title stringlengths 10 172 | question_id int64 469 40.1M | question_body stringlengths 22 48.2k | question_score int64 -44 5.52k | question_date stringlengths 20 20 | answer_id int64 497 40.1M | answer_body stringlengths 18 33.9k | answer_score int64 -38 8.38k | answer_date stringlengths 20 20 | tags list |
|---|---|---|---|---|---|---|---|---|---|
Cleaner method for finding the shortest distance between points in a python list? | 39,396,310 | <p>I have a list of tuples and an individual point in python e.g. [(1,2) , (2,5), (6,7), (9,3)] and (2,1) , and I want to figure out the fastest path possible created by all combinations of the individual point to the list of points.(Basically I want to find the most efficient way to get to all of the points starting f... | 2 | 2016-09-08T16:44:04Z | 39,396,555 | <p>Try to find all combination, then check the shortest distance.</p>
| -1 | 2016-09-08T17:00:05Z | [
"python",
"for-loop",
"while-loop",
"distance",
"heuristics"
] |
Cleaner method for finding the shortest distance between points in a python list? | 39,396,310 | <p>I have a list of tuples and an individual point in python e.g. [(1,2) , (2,5), (6,7), (9,3)] and (2,1) , and I want to figure out the fastest path possible created by all combinations of the individual point to the list of points.(Basically I want to find the most efficient way to get to all of the points starting f... | 2 | 2016-09-08T16:44:04Z | 39,396,903 | <p>Since you don't have so many point, you can easily use a solution that try every possibility.</p>
<p>Here is what you can do:</p>
<p>First get all combinations:</p>
<pre><code>>>> list_of_points = [(1,2) , (2,5), (6,7), (9,3)]
>>> list(itertools.permutations(list_of_points))
[((1, 2), (2, 5), (6... | 2 | 2016-09-08T17:23:58Z | [
"python",
"for-loop",
"while-loop",
"distance",
"heuristics"
] |
Cleaner method for finding the shortest distance between points in a python list? | 39,396,310 | <p>I have a list of tuples and an individual point in python e.g. [(1,2) , (2,5), (6,7), (9,3)] and (2,1) , and I want to figure out the fastest path possible created by all combinations of the individual point to the list of points.(Basically I want to find the most efficient way to get to all of the points starting f... | 2 | 2016-09-08T16:44:04Z | 39,397,687 | <p>If this is anything like the traveling salesman problem, then you want to check out the <a href="https://networkx.github.io/" rel="nofollow">NetworkX</a> python module. </p>
| 0 | 2016-09-08T18:17:43Z | [
"python",
"for-loop",
"while-loop",
"distance",
"heuristics"
] |
Making a Twitter clone in Django, having trouble with displaying the right user when displaying tweets | 39,396,328 | <p>I have user registration. Whenever I log in as a certain user, all the tweets are said to be tweeted by that user, even if it wasn't.</p>
<p><strong>forms.py</strong></p>
<pre><code>from django.contrib.auth.models import User
from django import forms
class UserForm(forms.ModelForm):
password = forms.CharField... | -1 | 2016-09-08T16:44:55Z | 39,396,363 | <p>In your template, you are showing the logged in user <code>{{user.username}}</code> instead of <code>{{howl.author.username}}</code></p>
| 0 | 2016-09-08T16:47:19Z | [
"python",
"django"
] |
Making a Twitter clone in Django, having trouble with displaying the right user when displaying tweets | 39,396,328 | <p>I have user registration. Whenever I log in as a certain user, all the tweets are said to be tweeted by that user, even if it wasn't.</p>
<p><strong>forms.py</strong></p>
<pre><code>from django.contrib.auth.models import User
from django import forms
class UserForm(forms.ModelForm):
password = forms.CharField... | -1 | 2016-09-08T16:44:55Z | 39,399,445 | <p>On my HowlCreate view, I didn't set the author to the howl. I only set the content. </p>
<pre><code>class HowlCreate(CreateView):
model = Howl
fields = ['content']
# This sets up the author
def form_valid(self, form):
instance = form.save(commit=False)
instance.author = self.reques... | 0 | 2016-09-08T20:14:34Z | [
"python",
"django"
] |
Kivy: get parent inside widget which is added in python | 39,396,372 | <p>How do I get the reference to a parent inside a widget that is not added by kvlang but in python.
Normally you would just call <code>self.parent</code> however that returns <code>Null</code> if the widget is added in python to the parent.</p>
<p>An example:</p>
<pre><code>import kivy
kivy.require('1.9.0') # replac... | 0 | 2016-09-08T16:47:38Z | 39,399,594 | <p>Widgets added with <code>add_widget</code> actually has a valid reference to their parent:</p>
<pre><code>from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
Builder.load_string('''
<ScreenTwo>
Label:
text: 'Hello, world'
''')
class... | 0 | 2016-09-08T20:24:25Z | [
"python",
"kivy"
] |
Is there a way to use the python -m mymod syntax from within the python interpreter? | 39,396,373 | <p>Many packages like unittest have an easy to use command line interface, e.g. the test discovery feature in unittest: <a href="https://docs.python.org/2/library/unittest.html#test-discovery" rel="nofollow">https://docs.python.org/2/library/unittest.html#test-discovery</a></p>
<p>However, to achieve the same from wit... | 0 | 2016-09-08T16:47:38Z | 39,401,172 | <p>You can use the <a href="https://docs.python.org/2/library/runpy.html#runpy.run_module" rel="nofollow"><code>runpy.run_module</code> function</a>:</p>
<pre><code>import runpy
import sys
sys.argv[1:] = ['arg1', 'arg2', 'arg3']
runpy.run_module('module.name', run_name='__main__', alter_sys=True)
</code></pre>
<p>Th... | 1 | 2016-09-08T22:34:11Z | [
"python"
] |
logging how to control the times in which flush to log file | 39,396,393 | <p>I've to use logging module and wonder if there is a way to log into existing log file , by appending my data to the existing file and more important if I can control the times I flush into the file.</p>
<p>Currently I need to be able to flush all the time to the file because, there are cases in which the script run... | 1 | 2016-09-08T16:48:44Z | 39,396,567 | <p>If you use <code>logging.FileHandler</code> and choose an existing log file, by default it will append to that file. The method that actually writes the log record is the <code>emit()</code> method on logging handlers. If you look at the source code for the <code>FileHandler</code>, it <code>flush</code>'s after <... | 1 | 2016-09-08T17:00:36Z | [
"python",
"python-2.7",
"logging",
"flush"
] |
Django refuses to accept my one-off default value for FloatField | 39,396,610 | <p>I have a class and I'm trying to add a new <code>FloatField</code> to it. Django wants a default value to populate existing rows (reasonable). However, it refuses to accept any value I give it.</p>
<pre><code>You are trying to add a non-nullable field 'FIELDNAME' to CLASS without a default; we can't do that (the da... | 1 | 2016-09-08T17:03:18Z | 39,396,672 | <p>You should select option 1 and then input your value</p>
<pre><code> 1) Provide a one-off default now (will be set on all existing rows with a null value for this column)
2) Quit, and let me add a default in models.py
1
</code></pre>
<p>After selecting 1. It would ask to provide your default value.</p>
<pre><co... | 1 | 2016-09-08T17:08:05Z | [
"python",
"django"
] |
Adding Lat Lon coordinates to separate columns (python/dataframe) | 39,396,678 | <p>I'm sure this is a simple thing to do but I am new to Python and cannot work it out!</p>
<p>I have a data frame with one column containing coordinates and I am wanting to remove the brackets and add the Lat/Lon values into separate columns.</p>
<p>Current dataframe:</p>
<pre><code>gridReference
(56.37769816725615... | -1 | 2016-09-08T17:08:18Z | 39,396,974 | <pre><code>>>> df = pd.DataFrame({'latlong': ['(12, 32)', '(43, 54)']})
>>> df
latlong
0 (12, 32)
1 (43, 54)
>>> split_data = df.latlong.str.strip(')').str.strip('(').str.split(', ')
>>> df['lat'] = split_data.apply(lambda x: x[0])
>>> df['long'] = split_data.apply(la... | 0 | 2016-09-08T17:29:10Z | [
"python",
"pandas",
"dataframe"
] |
Adding Lat Lon coordinates to separate columns (python/dataframe) | 39,396,678 | <p>I'm sure this is a simple thing to do but I am new to Python and cannot work it out!</p>
<p>I have a data frame with one column containing coordinates and I am wanting to remove the brackets and add the Lat/Lon values into separate columns.</p>
<p>Current dataframe:</p>
<pre><code>gridReference
(56.37769816725615... | -1 | 2016-09-08T17:08:18Z | 39,406,674 | <pre><code>df['gridReference'].str.strip('()') \
.str.split(', ', expand=True) \
.rename(columns={0:'Latitude', 1:'Longitude'})
Latitude Longitude
0 56.37769816725615 -4.325049868061924
1 56.3776981672561... | 1 | 2016-09-09T08:01:04Z | [
"python",
"pandas",
"dataframe"
] |
TypeError: list indices must be integers, not str. Know the issue, not the answer | 39,396,683 | <p>Unique situation, I know the problem, just dont know a solution. </p>
<pre><code>import string
timefile = open('lasttimemultiple.txt','r+')#opens the file that contains the last time run
lasttime = timefile.read()#reads the last time file
items= int(2)
splitlines = string.split(lasttime,'\n')
print splitli... | 0 | 2016-09-08T17:08:44Z | 39,396,800 | <p>You should show the actual traceback. If you had, you would have seen that the error is in this line:</p>
<pre><code>if splitlines[items][0:2] == PullType:
</code></pre>
<p>That's because <code>items</code> here has been redefined by the for loop in the line before. In a for loop in Python, the variable is not a c... | 0 | 2016-09-08T17:16:37Z | [
"python"
] |
Running tensorflow as daemon and piping all output to log file | 39,396,694 | <p>To run tensorflow model as daemon I use : </p>
<pre><code>nohup python translate.py --data_dir data &
</code></pre>
<p>This logs error messages to nohup.out but it does not capture Tensorflow stdout . This thread offers describes related : <a href="https://groups.google.com/a/tensorflow.org/forum/#!topic/discu... | 0 | 2016-09-08T17:09:42Z | 39,398,882 | <p>Why not try </p>
<pre><code>nohup python translate.py --data_dir data &> outputfile.txt
</code></pre>
<p>You can then suspend the file your self with kill -19 %1 to suspend the first job or whatever number its present as. Then kill -CONT %1 to restart it. </p>
<p>Other options:</p>
<ul>
<li>"disown" comma... | 0 | 2016-09-08T19:34:46Z | [
"python",
"linux",
"tensorflow"
] |
Class property inheritance when property is another class' property in python | 39,396,798 | <p>I have a class:</p>
<pre><code>class a():
def __init__(self):
self.x = ["a", "b"]
</code></pre>
<p>and another class:</p>
<pre><code>class b():
def __init__(self, r):
self.y = r
def chg(self, a):
self.y = a
</code></pre>
<p>I do:</p>
<pre><code>>>> m = a()
>>&g... | -1 | 2016-09-08T17:16:33Z | 39,396,863 | <p>Inheritance does not work this way in Python. However, I think your problem is mutability rather than inheritance itself. (You did not apply inheritance, I said these because you used it as a tag and in the title.)</p>
<p>Try it like this.</p>
<pre><code>class a():
def __init__(self):
self.x = [5]
cla... | 2 | 2016-09-08T17:21:07Z | [
"python",
"class",
"inheritance",
"properties"
] |
Class property inheritance when property is another class' property in python | 39,396,798 | <p>I have a class:</p>
<pre><code>class a():
def __init__(self):
self.x = ["a", "b"]
</code></pre>
<p>and another class:</p>
<pre><code>class b():
def __init__(self, r):
self.y = r
def chg(self, a):
self.y = a
</code></pre>
<p>I do:</p>
<pre><code>>>> m = a()
>>&g... | -1 | 2016-09-08T17:16:33Z | 39,396,948 | <p>Oke so you need to do a little reading up on how memory works in python. What you do here:</p>
<pre><code>>>> n = b(m.x)
>>> n.y
5
</code></pre>
<p>Is asking for the value m.x en sending it to the constructor of n. The value of m.x is 5 at that moment so 5 is passed to the constructor which then ... | 1 | 2016-09-08T17:26:45Z | [
"python",
"class",
"inheritance",
"properties"
] |
no module named AppConfig | 39,396,929 | <p>I'm trying to run a server on my computer in Python/Django. In my installed_apps, I had a program called csvimport. It didn't work, so I had to install django-csvimport and I had to change it to csvimport.app.AppConfig in my installed-apps. However, I still get an importerror message saying "no module named AppConfi... | 1 | 2016-09-08T17:25:42Z | 39,396,993 | <p><code>AppConfig</code> is Django's base class for the configuration class of custom apps, not necessarily the name of the config class of the app. But you're almost there:</p>
<p><a href="https://github.com/edcrewe/django-csvimport/blob/master/csvimport/app.py#L5" rel="nofollow"><code>csvimport.app.CSVImportConf</c... | 0 | 2016-09-08T17:30:23Z | [
"python",
"django",
"python-2.7"
] |
SQLAlchemy - AttributeError: _reverse_property | 39,396,934 | <p>I'm having some trouble working and learning SQLALCHEMY and I think the issue is to do with my back_populates in relationships, but I've not been able to suss it out. Can you please point me in the right direction? </p>
<p>The tables are created successfully and everything seems to be in order until I try and creat... | 0 | 2016-09-08T17:25:53Z | 39,397,346 | <p>Relationship back_populates reference other relationships, not columns.</p>
<p>Revised code:</p>
<pre><code>from sqlalchemy import Column, ForeignKey, Integer, String, Boolean, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, sessionmaker
from sqlalchemy imp... | 0 | 2016-09-08T17:54:51Z | [
"python",
"python-3.x",
"sqlalchemy"
] |
compute mean of a column with python | 39,396,973 | <p>I have a dataframe df : </p>
<pre><code>TIMESTAMP equipement1 equipement2
2016-05-10 13:20:00 0.000000 0.000000
2016-05-10 14:40:00 0.400000 0.500000
2016-05-10 15:20:00 0.500000 0.500000
</code></pre>
<p>I would like to compute for each equipmeentx the ratio when timestamp in [TS_min, TS_max]
For example functio... | 0 | 2016-09-08T17:29:02Z | 39,397,189 | <p>Assuming TIMESTAMP is a datetime type, here is one way:</p>
<pre><code>df = df.set_index('TIMESTAMP')
r = df.ix['2016-05-10 14:40:00':'2016-05-10 15:20:00']
r/r.sum()
equipement1 equipement2
TIMESTAMP
2016-05-10 14:40:00 0.444444 0.5
2016-05-10 15:20:00 0.555556 0.5
... | 1 | 2016-09-08T17:43:53Z | [
"python",
"pandas"
] |
To how list group by values and values in that category | 39,396,984 | <p>I want my template to display my group by category as a header, and then all the values for that group by category under it. For example, my table looks like this:</p>
<pre><code>['John','Physics']
['Jim','Physics']
['Sam','Biology']
['Sarah','Biology']
</code></pre>
<p>And I want the template to output this:</p>
... | 0 | 2016-09-08T17:29:51Z | 39,397,062 | <p>The template (department.html) is the place where you're going to list all the student. You must have some similar to this:</p>
<pre><code>{% if students %}
{% for student in students %}
<p>{{ student.NAME_FIELD }}</p>
{{ student.DEPARTMENT_FIELD}}
{% endfor %}
{% else %}
No ... | 1 | 2016-09-08T17:34:57Z | [
"python",
"django",
"django-templates",
"django-views",
"django-1.10"
] |
How does Python Pandas process a list of tables? | 39,397,024 | <p>I have this simple clean_data function, which will round the numbers in the input data frame. The code works, but I am very puzzled why it works. Could anybody help me understand?</p>
<p>The part where I got confused is this. table_list is a new list of data frame, so after running the code, each item inside table_... | 1 | 2016-09-08T17:32:17Z | 39,397,480 | <p>Simplest way is to break down this code completely:</p>
<pre><code># List of 3 dataframes
table_list = [tablea, tableb, tablec]
# function that cleans 1 dataframe
# This will get applied to each dataframe in table_list
# when the python function map is used AFTER this function
def clean_data(df):
# for loop.
... | 0 | 2016-09-08T18:03:58Z | [
"python",
"pandas"
] |
How does Python Pandas process a list of tables? | 39,397,024 | <p>I have this simple clean_data function, which will round the numbers in the input data frame. The code works, but I am very puzzled why it works. Could anybody help me understand?</p>
<p>The part where I got confused is this. table_list is a new list of data frame, so after running the code, each item inside table_... | 1 | 2016-09-08T17:32:17Z | 39,400,652 | <p>In Python, a list of dataframes, or any complicated objects, is simply a list of references that will point to the underlying data frames. For example, the first element of table_list is a reference to tablea. Therefore, clean_data will go directly to the data frame, i.e., tablea, following the reference given by ta... | 0 | 2016-09-08T21:43:04Z | [
"python",
"pandas"
] |
Script works differently when ran from the terminal and ran from Python | 39,397,034 | <p>I have a short bash script <code>foo.sh</code></p>
<pre><code>#!/bin/bash
cat /dev/urandom | tr -dc 'a-z1-9' | fold -w 4 | head -n 1
</code></pre>
<p>When I run it directly from the shell, it runs fine, exiting when it is done</p>
<pre><code>$ ./foo.sh
m1un
$
</code></pre>
<p>but when I run it from Python</p>
... | 8 | 2016-09-08T17:32:50Z | 39,398,969 | <p>Adding the <code>trap -p</code> command to the bash script, stopping the hung python process and running <code>ps</code> shows what's going on:</p>
<pre><code>$ cat foo.sh
#!/bin/bash
trap -p
cat /dev/urandom | tr -dc 'a-z1-9' | fold -w 4 | head -n 1
$ python -c "import subprocess; subprocess.call(['./foo.sh'])"
... | 8 | 2016-09-08T19:40:06Z | [
"python",
"bash",
"subprocess",
"pipeline"
] |
Script works differently when ran from the terminal and ran from Python | 39,397,034 | <p>I have a short bash script <code>foo.sh</code></p>
<pre><code>#!/bin/bash
cat /dev/urandom | tr -dc 'a-z1-9' | fold -w 4 | head -n 1
</code></pre>
<p>When I run it directly from the shell, it runs fine, exiting when it is done</p>
<pre><code>$ ./foo.sh
m1un
$
</code></pre>
<p>but when I run it from Python</p>
... | 8 | 2016-09-08T17:32:50Z | 39,438,276 | <p>The problem with Python 2 handling <code>SIGPIPE</code> in a non-standard way (i.e., being ignored) is already coined in Leon's answer, and the fix is given in the link: set <code>SIGPIPE</code> to default (<code>SIG_DFL</code>) with, e.g.,</p>
<pre><code>import signal
signal.signal(signal.SIGPIPE,signal.SIG_DFL)
<... | 1 | 2016-09-11T16:32:25Z | [
"python",
"bash",
"subprocess",
"pipeline"
] |
Set test case files for travis | 39,397,160 | <p>I have this <a href="https://github.com/b5y/log2html" rel="nofollow">project</a> on GitHub which has test case files. I run tests locally via pytest and all passed. But travis does not pass these tests and outputs errors:</p>
<p><code>OSError: [Errno 2] No such file or directory: '/home/travis/build/b5y/log2html/te... | 0 | 2016-09-08T17:41:11Z | 39,397,468 | <p>Somehow your tests are being run from the log directory inside your build directory. Make sure that travis-ci is in the same directory when it runs tests as you are when you run tests. It may be helpful to include a <code>pwd</code> or <code>ls</code> in the <code>script:</code> section of your <code>.travis.yml</co... | 0 | 2016-09-08T18:03:13Z | [
"python",
"travis-ci",
"py.test"
] |
How to get selected attributes of an object in to a python list? | 39,397,332 | <p>How do I create a list with the selected attributes of an object in python ? Using list comprehensions.</p>
<p>E.g: </p>
<p>My object A has</p>
<pre><code>A.name
A.age
A.height
</code></pre>
<p>and many more attributes</p>
<p>How do I create a list <code>[name,age]</code></p>
<p>I can do it manually but it loo... | 0 | 2016-09-08T17:53:47Z | 39,397,350 | <p>What you're looking for is <a href="https://docs.python.org/2/library/operator.html#operator.attrgetter" rel="nofollow"><code>operator.attrgetter</code></a></p>
<pre><code>attrs = ['name', 'age']
l = list(operator.attrgetter(*attrs)(A))
</code></pre>
| 1 | 2016-09-08T17:55:16Z | [
"python",
"list",
"list-comprehension",
"python-2.x"
] |
How to get selected attributes of an object in to a python list? | 39,397,332 | <p>How do I create a list with the selected attributes of an object in python ? Using list comprehensions.</p>
<p>E.g: </p>
<p>My object A has</p>
<pre><code>A.name
A.age
A.height
</code></pre>
<p>and many more attributes</p>
<p>How do I create a list <code>[name,age]</code></p>
<p>I can do it manually but it loo... | 0 | 2016-09-08T17:53:47Z | 39,397,351 | <p>Why not just <code>[A.name, A.age]</code>? <code>list</code> literals are simple. <a href="https://docs.python.org/3/library/operator.html#operator.attrgetter">You could use <code>operator.attrgetter</code> if you need to do it a lot</a>, though it returns <code>tuple</code>s when fetching multiple attributes, not <... | 5 | 2016-09-08T17:55:22Z | [
"python",
"list",
"list-comprehension",
"python-2.x"
] |
How to get selected attributes of an object in to a python list? | 39,397,332 | <p>How do I create a list with the selected attributes of an object in python ? Using list comprehensions.</p>
<p>E.g: </p>
<p>My object A has</p>
<pre><code>A.name
A.age
A.height
</code></pre>
<p>and many more attributes</p>
<p>How do I create a list <code>[name,age]</code></p>
<p>I can do it manually but it loo... | 0 | 2016-09-08T17:53:47Z | 39,397,461 | <p>You can collect them going through all <code>A</code> class attributes and checking if they aren't method or built-in.</p>
<pre><code>import inspect
def collect_props():
for name in dir(A):
if not inspect.ismethod(getattr(A, name)) and\
not name.startswith('__'):
yield name
prin... | 0 | 2016-09-08T18:02:46Z | [
"python",
"list",
"list-comprehension",
"python-2.x"
] |
Creating new columns from unique values across rows in pandas | 39,397,389 | <p>I'm trying to use unique values in a pandas column to generate a new set of column. Here's an example <code>DataFrame</code>:</p>
<pre><code> meas1 meas2 side newindex
0 1 3 L 0
1 2 4 R 0
2 6 8 L 1
3 7 9 R 1
</code></p... | 0 | 2016-09-08T17:57:47Z | 39,397,657 | <p>Use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.pivot.html" rel="nofollow"><code>DataFrame.pivot</code></a>:</p>
<pre><code># Perform the pivot.
df = df.pivot(index='newindex', columns='side').rename_axis(None)
# Format the columns.
df.columns = df.columns.map('_'.join)
</code><... | 3 | 2016-09-08T18:15:26Z | [
"python",
"pandas",
"dataframe"
] |
Creating new columns from unique values across rows in pandas | 39,397,389 | <p>I'm trying to use unique values in a pandas column to generate a new set of column. Here's an example <code>DataFrame</code>:</p>
<pre><code> meas1 meas2 side newindex
0 1 3 L 0
1 2 4 R 0
2 6 8 L 1
3 7 9 R 1
</code></p... | 0 | 2016-09-08T17:57:47Z | 39,397,857 | <p>Another solution using <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.core.groupby.GroupBy.prod.html" rel="nofollow"><code>groupby.prod</code></a>:</p>
<pre><code>df = df.groupby(['side', 'newindex']).prod().unstack(level=0)
df.columns = ['_'.join(c[0::]) for c in df.columns]
meas1... | 1 | 2016-09-08T18:27:52Z | [
"python",
"pandas",
"dataframe"
] |
split in python return an excess blank character | 39,397,392 | <p>I have a file with some data that I read,split with <code>space</code>,<code>,</code> ,<code>\n</code> and take it in a matrix.
But my code return an excess blank character into my matrix. Can anybody help me find this bug? Thanks.
code:</p>
<pre><code>import re
lines = [re.split('[,\n ]',line) for line in open('li... | 0 | 2016-09-08T17:57:52Z | 39,397,427 | <p>lines read from a text file generally have a newline on the end (unless they're the last line in which case they might not). It's pretty common to see that newline stripped off (e.g. using <a href="https://docs.python.org/3/library/stdtypes.html#str.rstrip" rel="nofollow"><code>str.rstrip</code></a>):</p>
<pre><co... | 2 | 2016-09-08T18:00:33Z | [
"python",
"regex",
"split"
] |
How to get the needed varibales due to the condition? | 39,397,476 | <p>I have lists with values like this for example:</p>
<pre><code>values = [value_one, value_two, list_A[], list_B[], list_C[]]
</code></pre>
<p>... which are in a map (all these lists have the same structure as the example above, but with different values!):</p>
<pre><code>{
key_one: valuesA,
key_two: valuesB... | 0 | 2016-09-08T18:03:44Z | 39,397,900 | <p>If you can determine under different conditions which lists to be extracted before do_calculate, I suggest you use the positions of lists in the <code>data</code> tuple to extract them.</p>
<pre><code>def positions_of_list():
# conditions
return pos1, pos2
def calculate_process(map):
for key, data in m... | 0 | 2016-09-08T18:30:05Z | [
"python",
"python-2.7"
] |
Can I get a list (name - email) of fans who likes a public page using the facebook SDK and python? | 39,397,544 | <p>I was trying to get a list of fans who likes a public page.</p>
<p>If that is not possible a list of people who likes comments made in that public page.</p>
<p>This link make me thing that in fact it is possible:</p>
<p><a href="https://www.facebook.com/search/102381354573/likers?ref=about" rel="nofollow">https:/... | 0 | 2016-09-08T18:08:06Z | 39,401,286 | <p>No, there is no API to get a list of fans. You can only get a list of users who commented or liked something on your Page, but there is no way to get their email. It would be weird anyway, what would you want to do with the email? Without explicit approval of the user, you would not even be allowed to store the emai... | 2 | 2016-09-08T22:49:11Z | [
"python",
"json",
"facebook",
"facebook-graph-api",
"sdk"
] |
Django Admin add edit/create buttons to Parent | 39,397,545 | <p>I'm trying to add an add and edit link to my Django admin for the ForeignKey field category. I already have this on the schedule field, however this is handled by djcelery and i cannot figure out how they do this:</p>
<p><a href="http://i.stack.imgur.com/1DtMB.png" rel="nofollow"><img src="http://i.stack.imgur.com/... | 0 | 2016-09-08T18:08:07Z | 39,397,731 | <p>Facepalm! I got the desiredresult once i added a admin for categories:</p>
<pre><code>admin.site.register(Category)
</code></pre>
<p><a href="http://i.stack.imgur.com/J7dHK.png" rel="nofollow"><img src="http://i.stack.imgur.com/J7dHK.png" alt="enter image description here"></a></p>
<p>However, if any one know how... | 0 | 2016-09-08T18:20:15Z | [
"python",
"django",
"django-admin",
"celery",
"django-celery"
] |
Django Admin add edit/create buttons to Parent | 39,397,545 | <p>I'm trying to add an add and edit link to my Django admin for the ForeignKey field category. I already have this on the schedule field, however this is handled by djcelery and i cannot figure out how they do this:</p>
<p><a href="http://i.stack.imgur.com/1DtMB.png" rel="nofollow"><img src="http://i.stack.imgur.com/... | 0 | 2016-09-08T18:08:07Z | 39,407,684 | <p>I cannot comment because of low reputation. So adding as an answer. Returning an empty dict from get_model_perms excludes the model admin from index page, whilst still allowing you to edit instances directly. <a href="http://stackoverflow.com/questions/2431727/django-admin-hide-a-model/4871511#4871511">Here is the m... | 1 | 2016-09-09T08:59:24Z | [
"python",
"django",
"django-admin",
"celery",
"django-celery"
] |
ordered word perminuations in python | 39,397,626 | <p>So my question is simple, and half of it is already working.
I need help with generating ordered word-permutations. </p>
<p>My code:</p>
<pre><code>from os.path import isfile
from string import printable
def loadRuleSet(fileLocation):
rules = {}
assert isfile(fileLocation)
for x in open(fileLocation).... | -1 | 2016-09-08T18:13:47Z | 39,397,648 | <p>In your case you can use <code>permutations</code> function which could return all possible orderings, no repeated elements.</p>
<pre><code>from itertools import permutations
from operator import itemgetter
perm_one = sorted(set([''.join(x) for x in permutations('@aa')]))
perm_two = sorted(set([''.join(x) for x in... | 2 | 2016-09-08T18:14:46Z | [
"python",
"data-generation"
] |
identify global symbols in lambda expressions | 39,397,679 | <p>I need to get the list of names of all symbols which I must have available in order to evaluate or execute a piece of code. I tried to use <code>symtable</code> module but it seems that it does not handle properly lambdas and inner functions (<code>def</code>s inside other code). Consider this:</p>
<pre><code>impor... | 0 | 2016-09-08T18:17:16Z | 39,398,038 | <p>Without much ado... I need to look into child symbol tables. Recursion is the tool of choice:</p>
<pre><code>import symtable
def find_global_symbols(table):
symbols = set()
for t in table.get_children():
symbols |= find_global_symbols(t)
symbols |= set(s.get_name() for s in table.get_symbols() ... | 0 | 2016-09-08T18:38:43Z | [
"python",
"lambda"
] |
how to call def from another .py in different folder | 39,397,720 | <p>I have following structure:
utils_dir has generator.py file which has 3 defs.</p>
<p>I have test.py in inline_dir. And I am trying to use defs from generator.py in test.py. </p>
<p>inline_dir and utils_dir are in different folders.
How can I achieve it to use defs?</p>
<p>Tried with creating <code>_init_.py</code... | 2 | 2016-09-08T18:19:34Z | 39,398,291 | <p>It sounds like you're trying to execute a .py file in a subdirectory.</p>
<p>Assuming the following directory structure:</p>
<pre><code>.
âââ inline
â  âââ __init__.py
â  âââ main.py
âââ utils
âââ __init__.py
âââ generator.py
</code></pre>
<p>And your <code>ma... | 1 | 2016-09-08T18:55:08Z | [
"python"
] |
how to call def from another .py in different folder | 39,397,720 | <p>I have following structure:
utils_dir has generator.py file which has 3 defs.</p>
<p>I have test.py in inline_dir. And I am trying to use defs from generator.py in test.py. </p>
<p>inline_dir and utils_dir are in different folders.
How can I achieve it to use defs?</p>
<p>Tried with creating <code>_init_.py</code... | 2 | 2016-09-08T18:19:34Z | 39,398,501 | <p>This is a kind of a python path problem. When you import, python will search current directory and default system path directory. Since utils_dir is not your current work directory (when import, you work in inline_dir), nor in default python search system path, that is why the import not work.</p>
<p>A simple way t... | 1 | 2016-09-08T19:09:31Z | [
"python"
] |
Is "python2" / "python3" safe on a script's shebang? | 39,397,745 | <p>Sometimes I see <code>#!/usr/bin/python2</code> and <code>#!/usr/bin/python3</code> as opposed to simply <code>#!/usr/bin/python</code>. I get the appeal of this approach, you get to explicitly say if you need Python 2 or 3 without doing some weird version checking.</p>
<p>Are these <code>python2</code> and <code>p... | 1 | 2016-09-08T18:21:02Z | 39,397,764 | <p>As a single point of reference -- I don't have a <code>python2</code> executable on my system:</p>
<pre><code>$ python2
-bash: python2: command not found
</code></pre>
<p>So I would definitely not consider this one to be portable. Obviously I could still run your script by selecting an executable explicitly:</p>
... | 1 | 2016-09-08T18:22:06Z | [
"python",
"scripting",
"portability",
"shebang"
] |
Python list manipulation based on indexing | 39,397,853 | <p>I have two lists:</p>
<p>The first list consists of all the titles of various publications where as the second list consists of all the author names.</p>
<pre><code>list B = ['Moe Terry M 2005 ', 'March James G and Johan P Olsen 2006 ', 'Kitschelt Herbert 2000 ', 'Bates Robert H 1981 ' , .......]
list A = ['"Link... | 0 | 2016-09-08T18:27:34Z | 39,398,006 | <p>Is this is what you are looking for?</p>
<pre><code>list B = ['Moe Terry M 2005 ', 'March James G and Johan P Olsen 2006 ', 'Kitschelt Herbert 2000 ', 'Bates Robert H 1981 ' , .......]
list A = ['"Linkages between Citizens and Politicians in Democratic Polities,"', '"Winners Take All: The Politics of Partial Refor... | 1 | 2016-09-08T18:36:49Z | [
"python",
"list"
] |
cannot downloads file using python socket programming | 39,397,878 | <p>i want to download a file from this url (<a href="http://justlearn.16mb.com/a.jpg" rel="nofollow">http://justlearn.16mb.com/a.jpg</a>) using python sockets only and i dont know how to do it as i am a novice in python.</p>
<p>Actually my main goal is to download files in half part using wifi connection and other hal... | 1 | 2016-09-08T18:28:49Z | 39,399,007 | <p>You might want to try something like this instead. I am unable to test it due to a proxy, but the example should help you in the right direction. Using sockets directly would make this unnecessarily difficult.</p>
<pre><code>#! /usr/bin/env python3
import http.client
def main():
connection = http.client.HTTPC... | 0 | 2016-09-08T19:42:41Z | [
"python",
"sockets",
"wifi",
"ethernet",
"download-manager"
] |
Replace multi line code using python | 39,397,883 | <p>I am trying to replace some lines in HTML file using python.</p>
<pre><code>#! /usr/local/bin/python
import os,sys,string,filecmp,shutil,stat,pwd,datetime,time,copy,glob,re,getpass,commands
sys.path.insert(0,os.path.join(os.environ['ADM_TOOLS'],'llib'))
import tooldets,CSrcPrj,comnfuncs,COraConnect
patchHtmlName =... | 1 | 2016-09-08T18:29:02Z | 39,399,451 | <p>Try this one</p>
<pre><code>import re
...
...
newJSCode = re.sub(r'.*%s'%contents1, contents2, contents, re.DOTALL)
</code></pre>
<p>This will replace contents1 with contents2 in contents. I'm not sure whether I undestood which one is to be replaced, but anyway if you want the opposite just change contents1 to co... | 0 | 2016-09-08T20:14:50Z | [
"python"
] |
Running a Regex loop in a Pandas Dataframe | 39,397,897 | <p>I currently have a date column that has some issues. I have attempted to fix the problem but cannot come to a conclusion.</p>
<p>Here is the data:</p>
<pre><code># Import data
df_views = pd.read_excel('PageViews.xlsx')
# Check data types
df_views.dtypes
Out[57]:
Date object
Customer ID int64
dtype: ... | 2 | 2016-09-08T18:29:58Z | 39,398,702 | <p>As <a href="http://stackoverflow.com/questions/39397897/running-a-regex-loop-in-a-pandas-dataframe/39398702#comment66122084_39397897">@BrenBam has already written in the comment</a> - try to avoid using loops. Pandas gives us tons of vectorized (read fast and efficient) methods:</p>
<pre><code>In [67]: df
Out[67]:
... | 1 | 2016-09-08T19:22:07Z | [
"python",
"regex",
"loops",
"pandas",
"numpy"
] |
Using third party Email system for Django Password Reset | 39,398,013 | <p>I have a Django App hosted on Google Compute Engine(which doesn't allow port 25/465/587 to send Emails). So, I integrated a third party Email system in the Django App. Third party Email system works find on Google Compute Engine too. </p>
<p>But when I use Django Reset Password, that email is still getting sent ove... | 1 | 2016-09-08T18:37:16Z | 39,398,101 | <p>There is something like <a href="https://docs.djangoproject.com/el/1.10/topics/email/#email-backends" rel="nofollow">Email backends</a></p>
<pre><code># settings.py
EMAIL_BACKEND = 'project.backends.mail.CustomEmailBackend'
# project/backends/mail.py
from django.core.mail.backends.base import BaseEmailBackend
clas... | 1 | 2016-09-08T18:43:09Z | [
"python",
"django",
"email",
"passwords",
"google-compute-engine"
] |
Referring to outer scope from python class | 39,398,019 | <p>I have a (simplified) module, something like this:</p>
<pre><code>import tkinter as tk
__outerVar = {<dict stuff>}
class Editor(tk.Frame):
...
def _insideFunction(self):
for p in __outerVar.keys():
<do stuff>
</code></pre>
<p>I'm getting a <code>NameError: name '_Editor__outer... | 1 | 2016-09-08T18:37:46Z | 39,398,068 | <p>You're seeing name mangling in effect. From the <a href="https://docs.python.org/2/tutorial/classes.html#tut-private" rel="nofollow">documentation</a>:</p>
<blockquote>
<p>Any identifier of the form <code>__spam</code> (at least two leading underscores, at most one trailing underscore) is textually replaced with... | 3 | 2016-09-08T18:41:00Z | [
"python",
"class",
"python-3.x",
"module",
"scope"
] |
Referring to outer scope from python class | 39,398,019 | <p>I have a (simplified) module, something like this:</p>
<pre><code>import tkinter as tk
__outerVar = {<dict stuff>}
class Editor(tk.Frame):
...
def _insideFunction(self):
for p in __outerVar.keys():
<do stuff>
</code></pre>
<p>I'm getting a <code>NameError: name '_Editor__outer... | 1 | 2016-09-08T18:37:46Z | 39,398,072 | <p>Python replaces any names preceded by a double underscore <code>__</code> in order to simulate 'private attributes'. In essence <code>__name</code> becomes <code>_classname__name</code>. This, called name mangling, happens only within classes as documented <a href="https://docs.python.org/3/tutorial/classes.html#pri... | 3 | 2016-09-08T18:41:12Z | [
"python",
"class",
"python-3.x",
"module",
"scope"
] |
Django BooleanField as a dropdown | 39,398,031 | <p>Is there a way to make a Django BooleanField a drop down in a form?</p>
<p>Right now it renders as a radio button. Is it possible to have a dropdown with options: 'Yes', 'No' ?</p>
<p>Currently my form definition for this field is:</p>
<pre><code>attending = forms.BooleanField(required=True)
</code></pre>
| 1 | 2016-09-08T18:38:18Z | 39,399,015 | <p>I believe a solution that can solve your problem is something along the lines of this:</p>
<pre><code>TRUE_FALSE_CHOICE = (
(True, "Yes"),
(False, "No")
}
boolfield = forms.ChoiceField(choices = TRUE_FALSE_CHOICES, label="Some Label",
initial='', widget=forms.Select(), requir... | 3 | 2016-09-08T19:43:11Z | [
"python",
"django"
] |
what is correct way of type hint a function that return only a specific set of values? | 39,398,138 | <p>I have a function that can only return <code>a</code>, <code>b</code> or <code>c</code> all of them are of type <code>T</code> but I want to make part of its signature this fact because of the special meaning they carry in the context of the function, how I do that?</p>
<p>currently I use this</p>
<pre><code>def f... | 1 | 2016-09-08T18:45:31Z | 39,398,193 | <p>If all are of the same exact type just <em>add that as the return type</em>:</p>
<pre><code>def func(...) -> T: # or int or whatever else
</code></pre>
<blockquote>
<p>I want to express in the signature that the function only return those specific values</p>
</blockquote>
<p>Type hints don't specify a name o... | 0 | 2016-09-08T18:48:56Z | [
"python",
"python-3.x",
"type-hinting"
] |
what is correct way of type hint a function that return only a specific set of values? | 39,398,138 | <p>I have a function that can only return <code>a</code>, <code>b</code> or <code>c</code> all of them are of type <code>T</code> but I want to make part of its signature this fact because of the special meaning they carry in the context of the function, how I do that?</p>
<p>currently I use this</p>
<pre><code>def f... | 1 | 2016-09-08T18:45:31Z | 39,398,431 | <p>You can't specify that your function returns only a subset of a type's values using type hinting alone. As the name implies, type hinting is all about <em>types</em> not values.</p>
<p>However, you can create a new <code>enum.Enum</code> subtype that only has the values you're going to return and use it in the func... | 5 | 2016-09-08T19:05:17Z | [
"python",
"python-3.x",
"type-hinting"
] |
Expert system (used for database access) vs. ORM | 39,398,181 | <p>I have recently discovered <a href="http://pyke.sourceforge.net" rel="nofollow">PyKE</a>, and noticed that one of the given examples of a potential use (actually, the use for which it was originally built) was to compile SELECT statements to query a database, and map the result to a dictionary. The author emphasizes... | 0 | 2016-09-08T18:47:40Z | 39,511,064 | <h3>To your first question</h3>
<p>An ORM is a layer between your logic and data that maps one to the other. Relational DBs often don't store data the way your objects use that data, so ORMs aim to abstract away the mental gymnastics needed to write the SQL to transform the data from one representation to another. (im... | 2 | 2016-09-15T12:29:22Z | [
"python",
"orm",
"language-agnostic",
"expert-system",
"pyke"
] |
What is the equivalent function in Biopython for BioPerl's Bio::DB::Fasta? | 39,398,183 | <p>I'm translating a Perl code to a Python code using BioPython.</p>
<p>I got something like:</p>
<pre><code>my $db = Bio::DB::Fasta->new($path,$options)
</code></pre>
<p>and I'm looking for a similar function in Biopython. Is there anything like this?</p>
| 0 | 2016-09-08T18:47:53Z | 39,400,180 | <p>You can find the IO for FASTA files at <a href="http://biopython.org/DIST/docs/api/Bio.SeqIO-module.html" rel="nofollow">http://biopython.org/DIST/docs/api/Bio.SeqIO-module.html</a></p>
<p>About the indexing, I think Biopython doesn't handle '.fai' files like Bio::DB:Fasta. You can have a dictionary (like a perl ha... | 1 | 2016-09-08T21:04:19Z | [
"python",
"perl",
"biopython",
"bioperl"
] |
Create unique MultiIndex from Non-unique Index Python Pandas | 39,398,251 | <p>I have a pandas DataFrame with a non-unique index:</p>
<pre><code>index = [1,1,1,1,2,2,2,3]
df = pd.DataFrame(data = {'col1': [1,3,7,6,2,4,3,4]}, index=index)
df
Out[12]:
col1
1 1
1 3
1 7
1 6
2 2
2 4
2 3
3 4
</code></pre>
<p>I'd like to turn this into unique MultiIndex and pre... | 2 | 2016-09-08T18:53:06Z | 39,398,424 | <p>You can do a <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.core.groupby.GroupBy.cumcount.html" rel="nofollow"><code>groupby.cumcount</code></a> on the index, and then append it as a new level to the index using <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.se... | 2 | 2016-09-08T19:04:25Z | [
"python",
"pandas"
] |
How to remove/hide total sum in tree view in odoo? | 39,398,260 | <p>I have odoo tree view in which there are some warehouse stock values displaying in columns. And its calculating total sum of these warehouse values in the bottom. I want to remove total sum in the bottom in tree view, how i can do that? you can see my tree view code i applied sum="false", total="false" but its not w... | 1 | 2016-09-08T18:53:23Z | 39,398,430 | <p>If you just want to go to Settings/User Technical -> Interface -> Views you can edit the view like this. Just remove the sum tag entirely from the rows you wish not to be totalled.</p>
<pre><code><tree string="Warehouse Product" editable="bottom" create="false" edit="false" delete="false">
<field name="... | 3 | 2016-09-08T19:05:07Z | [
"python",
"xml",
"openerp",
"views",
"odoo-8"
] |
How to remove/hide total sum in tree view in odoo? | 39,398,260 | <p>I have odoo tree view in which there are some warehouse stock values displaying in columns. And its calculating total sum of these warehouse values in the bottom. I want to remove total sum in the bottom in tree view, how i can do that? you can see my tree view code i applied sum="false", total="false" but its not w... | 1 | 2016-09-08T18:53:23Z | 39,398,447 | <p>Just get rid of the sum attribute(s)</p>
<pre><code><tree string="Warehouse Product" editable="bottom" create="false" edit="false" delete="false">
<field name="warehouse_id"/>
<field name="qty" />
<field name="incoming_qty" />
<field name="outgoing_qty" />
... | 1 | 2016-09-08T19:05:47Z | [
"python",
"xml",
"openerp",
"views",
"odoo-8"
] |
How to remove/hide total sum in tree view in odoo? | 39,398,260 | <p>I have odoo tree view in which there are some warehouse stock values displaying in columns. And its calculating total sum of these warehouse values in the bottom. I want to remove total sum in the bottom in tree view, how i can do that? you can see my tree view code i applied sum="false", total="false" but its not w... | 1 | 2016-09-08T18:53:23Z | 39,398,489 | <p>Its done, i just remove sum="" from every field and it remove bottom line of total sum, here is my updated code</p>
<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code><tr... | 0 | 2016-09-08T19:08:50Z | [
"python",
"xml",
"openerp",
"views",
"odoo-8"
] |
How to resolve memory issue of pandas while reading big csv files | 39,398,283 | <p>I have a 100GB csv file with millions of rows. I need to read, say, 10,000 rows at a time in pandas dataframe and write that to the SQL server in chunks. </p>
<p>I used chunksize as well as iteartor as suggested on <a href="http://pandas-docs.github.io/pandas-docs-travis/io.html#iterating-through-files-chunk-by-chu... | 2 | 2016-09-08T18:54:36Z | 39,399,220 | <p>Demo:</p>
<pre><code>for chunk in pd.read_csv(filename, chunksize=10**5):
chunk.to_sql('table_name', conn, if_exists='append')
</code></pre>
<p>where <code>conn</code> is a SQLAlchemy engine (created by <code>sqlalchemy.create_engine(...)</code>)</p>
| 1 | 2016-09-08T19:57:44Z | [
"python",
"csv",
"pandas",
"dataframe",
"iterator"
] |
How to write python code that finishes a read from stdin even though the read buffer isn't full | 39,398,297 | <p>Python question:</p>
<pre><code>$ python -V
Python 2.4.3
</code></pre>
<p>Searched for the answer to this and maybe didn't know what search to use.</p>
<p>Basically the question is simple.
I have perl code like this and it works perfect.</p>
<pre><code>while ($count)
{
$count = sysread(STDIN,$data,2000);
... | 1 | 2016-09-08T18:55:31Z | 39,400,253 | <p>Non-blocking mode can be enabled for stdin like shown below. I added some sleep there to prevent CPU hogging.</p>
<pre><code>#!/usr/bin/env python
import os
import sys
import time
import fcntl
# Set stdin to non-blocking mode
flags = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
fcntl.fcntl(sys.stdin.fileno(), f... | 0 | 2016-09-08T21:10:12Z | [
"python",
"stdin"
] |
How to write python code that finishes a read from stdin even though the read buffer isn't full | 39,398,297 | <p>Python question:</p>
<pre><code>$ python -V
Python 2.4.3
</code></pre>
<p>Searched for the answer to this and maybe didn't know what search to use.</p>
<p>Basically the question is simple.
I have perl code like this and it works perfect.</p>
<pre><code>while ($count)
{
$count = sysread(STDIN,$data,2000);
... | 1 | 2016-09-08T18:55:31Z | 39,459,742 | <p>I think I figured out the best way. Unless someone can figure out how to make read behave like C and sysread in perl.
I make it non-blocking like above, but use a select to wait until data is available. Combining both, I get what I want. Wait until data is available and read the available data without blocking. Yea!... | 1 | 2016-09-12T22:33:16Z | [
"python",
"stdin"
] |
How to write python code that finishes a read from stdin even though the read buffer isn't full | 39,398,297 | <p>Python question:</p>
<pre><code>$ python -V
Python 2.4.3
</code></pre>
<p>Searched for the answer to this and maybe didn't know what search to use.</p>
<p>Basically the question is simple.
I have perl code like this and it works perfect.</p>
<pre><code>while ($count)
{
$count = sysread(STDIN,$data,2000);
... | 1 | 2016-09-08T18:55:31Z | 39,461,317 | <p>In the event you are able to use Python 3 instead:</p>
<pre><code>while True:
buf = sys.stdin.buffer.raw.read(10)
if buf::
print("Read", len(buf))
</code></pre>
<p>Then:</p>
<pre><code>while (( 1 ))
do
echo Sending ab 1>&2
echo -n ab
sleep 1
done | ./go.py
</code></pre>
<p>give... | 0 | 2016-09-13T02:17:47Z | [
"python",
"stdin"
] |
How does asyncio.sleep work with negative values? | 39,398,312 | <p>I decided to implement sleep sort (<a href="https://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort" rel="nofollow">https://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort</a>) using Python's <code>asyncio</code> when I made a strange discovery: it works with negative values (and returns immediately with 0)!</... | 4 | 2016-09-08T18:56:37Z | 39,399,052 | <p>If you take a look at the asyncio source, <code>sleep</code> <a href="https://github.com/python/cpython/blob/ce83a8c892ff17dc5eaba2420854d82589b269cd/Lib/asyncio/tasks.py#L505-L507" rel="nofollow">special cases 0</a> and returns immediately.</p>
<pre><code>if delay == 0:
yield
return result
</code></pre>
<... | 4 | 2016-09-08T19:45:52Z | [
"python",
"sorting",
"sleep",
"python-asyncio"
] |
How does asyncio.sleep work with negative values? | 39,398,312 | <p>I decided to implement sleep sort (<a href="https://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort" rel="nofollow">https://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort</a>) using Python's <code>asyncio</code> when I made a strange discovery: it works with negative values (and returns immediately with 0)!</... | 4 | 2016-09-08T18:56:37Z | 39,399,607 | <p>Well, looking at the <a href="https://hg.python.org/cpython/file/3.5/Lib/asyncio/tasks.py#l503" rel="nofollow">source</a>:</p>
<ul>
<li><code>delay == 0</code> is special-cased to return immediately, it doesn't even try to sleep.</li>
<li>Non-zero delay calls <code>events.get_event_loop()</code>. Since there are no... | 2 | 2016-09-08T20:25:02Z | [
"python",
"sorting",
"sleep",
"python-asyncio"
] |
Using Pycharm virtualenv with preexisting files | 39,398,318 | <p>I was sent a bunch of Python files that have various custom dependencies inside nested folders. I used to run the main file from Terminal by first navigating to the main folder, then running <code>python main.py</code>. This worked until I needed to update some modules and ran into permissions problems.</p>
<p>So I... | 2 | 2016-09-08T18:56:47Z | 39,409,962 | <p>In PyCharm, do File -> Open and point at the directory. It will turn that directory into a "project" (meaning, it will create a .idea subdirectory). Depending on how you named your virtualenv, it will likely detect the virtualenv and assign it the project's interpreter.</p>
| 1 | 2016-09-09T10:54:19Z | [
"python",
"pycharm",
"virtualenv"
] |
How Would I Go About Making My Python Scoring System Work? | 39,398,378 | <p>I've been learning through an online course and I was trying to come up with ideas for things I could create to "test" myself as it were so I came up with a rock paper scissors game. It was working well so I decided to try and add a way of keeping track of your score vs the computer. Didn't go so well.</p>
<p>Here'... | 1 | 2016-09-08T19:01:36Z | 39,398,484 | <p>At least one problem is this: your main has if...if...elif...else. The second if probably needs to be an elif. Tip: When you have a flow-of-control problem, put print statements inside each control branch, printing out the control variable and everything else that might possibly be relevant. This tells you which bra... | 0 | 2016-09-08T19:08:33Z | [
"python"
] |
How Would I Go About Making My Python Scoring System Work? | 39,398,378 | <p>I've been learning through an online course and I was trying to come up with ideas for things I could create to "test" myself as it were so I came up with a rock paper scissors game. It was working well so I decided to try and add a way of keeping track of your score vs the computer. Didn't go so well.</p>
<p>Here'... | 1 | 2016-09-08T19:01:36Z | 39,398,597 | <pre><code>from random import randint
class newgame():
ai_score = 0
user_score = 0
def __init__(self):
self.ai_score = 0
self.user_score = 0
def playgame(self):
print('New Game')
try:
while(1):
ai_guess = str(randint(1,3))
p... | 2 | 2016-09-08T19:15:23Z | [
"python"
] |
How Would I Go About Making My Python Scoring System Work? | 39,398,378 | <p>I've been learning through an online course and I was trying to come up with ideas for things I could create to "test" myself as it were so I came up with a rock paper scissors game. It was working well so I decided to try and add a way of keeping track of your score vs the computer. Didn't go so well.</p>
<p>Here'... | 1 | 2016-09-08T19:01:36Z | 39,398,654 | <p>It seems that the variable <code>option</code> is not '1', right ? Well, that's because the function <code>input</code> does not return a character string, but an <code>integer</code>. You can see this by adding a little trace in this program.</p>
<pre><code>print (option, type (option))
</code></pre>
<p>after a ... | 1 | 2016-09-08T19:18:54Z | [
"python"
] |
Find group of strings that are anagrams | 39,398,444 | <p>This question refers to <a href="http://www.lintcode.com/en/problem/anagrams/" rel="nofollow">this problem on lintcode</a>. I have a working solution, but it takes too long for the huge testcase. I am wondering how can it be improved? Maybe I can decrease the number of comparisons I make in the outer loop.</p>
<pr... | 4 | 2016-09-08T19:05:43Z | 39,398,607 | <p>Why not this? </p>
<pre><code>str1 = "cafe"
str2 = "face"
def isanagram(s1,s2):
return all(sorted(list(str1)) == sorted(list(str2)))
if isanagram(str1, str2):
print "Woo"
</code></pre>
| 0 | 2016-09-08T19:15:46Z | [
"python",
"string",
"anagram"
] |
Find group of strings that are anagrams | 39,398,444 | <p>This question refers to <a href="http://www.lintcode.com/en/problem/anagrams/" rel="nofollow">this problem on lintcode</a>. I have a working solution, but it takes too long for the huge testcase. I am wondering how can it be improved? Maybe I can decrease the number of comparisons I make in the outer loop.</p>
<pr... | 4 | 2016-09-08T19:05:43Z | 39,398,637 | <p>Skip strings you already placed in the set. Don't test them again.</p>
<pre><code># @param strs: A list of strings
# @return: A list of strings
def anagrams(self, strs):
# write your code here
ret=set()
for i in range(0,len(strs)):
for j in range(i+1,len(strs)):
# If both anagrams e... | 3 | 2016-09-08T19:17:46Z | [
"python",
"string",
"anagram"
] |
Find group of strings that are anagrams | 39,398,444 | <p>This question refers to <a href="http://www.lintcode.com/en/problem/anagrams/" rel="nofollow">this problem on lintcode</a>. I have a working solution, but it takes too long for the huge testcase. I am wondering how can it be improved? Maybe I can decrease the number of comparisons I make in the outer loop.</p>
<pr... | 4 | 2016-09-08T19:05:43Z | 39,398,767 | <p>As an addition to @Mike's great answer, here is a nice Pythonic way to do it:</p>
<pre><code>import collections
class Solution:
# @param strs: A list of strings
# @return: A list of strings
def anagrams(self, strs):
patterns = Solution.find_anagram_words(strs)
return [word for word in ... | 1 | 2016-09-08T19:27:36Z | [
"python",
"string",
"anagram"
] |
Find group of strings that are anagrams | 39,398,444 | <p>This question refers to <a href="http://www.lintcode.com/en/problem/anagrams/" rel="nofollow">this problem on lintcode</a>. I have a working solution, but it takes too long for the huge testcase. I am wondering how can it be improved? Maybe I can decrease the number of comparisons I make in the outer loop.</p>
<pr... | 4 | 2016-09-08T19:05:43Z | 39,398,876 | <p>Instead of comparing all pairs of strings, you can just create a dictionary (or <a href="https://docs.python.org/3/library/collections.html#collections.defaultdict" rel="nofollow"><code>collections.defaultdict</code></a>) mapping each of the letter-counts to the words having those counts. For getting the letter-coun... | 2 | 2016-09-08T19:34:32Z | [
"python",
"string",
"anagram"
] |
Find group of strings that are anagrams | 39,398,444 | <p>This question refers to <a href="http://www.lintcode.com/en/problem/anagrams/" rel="nofollow">this problem on lintcode</a>. I have a working solution, but it takes too long for the huge testcase. I am wondering how can it be improved? Maybe I can decrease the number of comparisons I make in the outer loop.</p>
<pr... | 4 | 2016-09-08T19:05:43Z | 39,399,047 | <p>Your solution is slow because you're not taking advantage of python's data structures. </p>
<p>Here's a solution that collects results in a dict:</p>
<pre><code>class Solution:
def anagrams(self, strs):
d = {}
for word in strs:
key = tuple(sorted(word))
try:
... | 1 | 2016-09-08T19:45:28Z | [
"python",
"string",
"anagram"
] |
Grouping of items based on criteria | 39,398,539 | <p>I have a list of items:</p>
<pre><code>ShelvesToPack = [{'ShelfLength': 2278.0, 'ShelfWidth': 356.0, 'ShelfArea': 759152.0, 'ItemNames': 1},
{'ShelfLength': 1220.0, 'ShelfWidth': 610.0, 'ShelfArea': 372100.0, 'ItemNames': 2},
{'ShelfLength': 2310.0, 'ShelfWidth': 762.0, 'ShelfArea': 1760220.0, 'ItemNames': 3},
{'Sh... | 0 | 2016-09-08T19:11:43Z | 39,398,866 | <p>Here is a simplified version of your code:</p>
<pre><code>data = [{'ShelfLength': 2278.0, 'ShelfWidth': 356.0, 'ShelfArea': 759152.0, 'ItemNames': 1},
{'ShelfLength': 1220.0, 'ShelfWidth': 610.0, 'ShelfArea': 372100.0, 'ItemNames': 2},
{'ShelfLength': 2310.0, 'ShelfWidth': 762.0, 'ShelfArea': 1760220.0, '... | 0 | 2016-09-08T19:33:51Z | [
"python",
"python-3.x"
] |
Grouping of items based on criteria | 39,398,539 | <p>I have a list of items:</p>
<pre><code>ShelvesToPack = [{'ShelfLength': 2278.0, 'ShelfWidth': 356.0, 'ShelfArea': 759152.0, 'ItemNames': 1},
{'ShelfLength': 1220.0, 'ShelfWidth': 610.0, 'ShelfArea': 372100.0, 'ItemNames': 2},
{'ShelfLength': 2310.0, 'ShelfWidth': 762.0, 'ShelfArea': 1760220.0, 'ItemNames': 3},
{'Sh... | 0 | 2016-09-08T19:11:43Z | 39,401,609 | <p>Here's something that appears to work correctly. Since the order of shelves in a combination doesn't matter, it simply does things using a brute-force approach that checks every possible combination of the shelves. Because there may be a very large number of them to process, it's important to write code which is fai... | 0 | 2016-09-08T23:28:01Z | [
"python",
"python-3.x"
] |
Python: Get javascript file from href tag of html | 39,398,592 | <p>Consider a website similar to this one:</p>
<p><a href="http://a810-bisweb.nyc.gov/bisweb/COsByLocationServlet?requestid=1&allbin=3055311" rel="nofollow">http://a810-bisweb.nyc.gov/bisweb/COsByLocationServlet?requestid=1&allbin=3055311</a></p>
<p>As one can see, the website contains links to pdf files refe... | 1 | 2016-09-08T19:14:59Z | 39,399,333 | <p>I downloaded few files and compared direct link with its name and all elements required in link you have in filename</p>
<p>Filename:</p>
<pre><code>form_cofo_pdf_view_B000114563.PDF
</code></pre>
<p>Direct link:</p>
<pre><code>http://a810-bisweb.nyc.gov/bisweb/CofoDocumentContentServlet
?passjobnumber=null
&... | 0 | 2016-09-08T20:05:08Z | [
"javascript",
"python",
"html",
"web",
"web-scraping"
] |
In pycharm can I run every file for django? | 39,398,625 | <p>I'm new to Django. My localhost site is running fine. Since I am using pycharm it is easy to run any file. I decided to run each file in my django project, and came across several errors, such as this one in my views.py:</p>
<pre><code>django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TAB... | 1 | 2016-09-08T19:17:06Z | 39,399,060 | <p>You cannot run each file present in your django project individual.</p>
<p>No matter those are file with <code>.py</code> extension. They depend on the django framework to get the project running.</p>
<p>The reason you might be seeing that error is because you might be using the attributes present in the <code>set... | 0 | 2016-09-08T19:46:16Z | [
"python",
"django",
"pycharm"
] |
In pycharm can I run every file for django? | 39,398,625 | <p>I'm new to Django. My localhost site is running fine. Since I am using pycharm it is easy to run any file. I decided to run each file in my django project, and came across several errors, such as this one in my views.py:</p>
<pre><code>django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TAB... | 1 | 2016-09-08T19:17:06Z | 39,604,322 | <p><strong>You can run</strong> any individual <strong>python file</strong> in a Django Project with Django, but keep in mind that the settings for Django must be supplied. This is not a good practise to run individual file with Django but for debugging purposes you may use it (<em>for example. to test a parser that yo... | 0 | 2016-09-20T21:54:42Z | [
"python",
"django",
"pycharm"
] |
Pandas groupby datatime index, possible bug | 39,398,821 | <p>I have a Pandas DataFrame with a column that is a tz-aware TimeStamp and I tried to groupby(level=0).first(). I get an incorrect result. Am I missing something or is it a pandas bug?</p>
<pre><code>x = pd.DataFrame(index = [1,1,2,2,2], data = pd.date_range("7:00", "9:00", freq="30min", tz = 'US/Eastern'))
In [58]:... | 3 | 2016-09-08T19:31:01Z | 39,408,751 | <p>I don't believe that it is a bug. If you go through the <a href="http://pytz.sourceforge.net/" rel="nofollow"><code>pytz</code></a> docs, it is clearly indicated that for timezone US/Eastern, there is no way to specify before / after the end-of-daylight-saving-time transition. </p>
<p>In such cases, sticking with U... | 1 | 2016-09-09T09:51:54Z | [
"python",
"pandas",
"timestamp"
] |
Pandas groupby datatime index, possible bug | 39,398,821 | <p>I have a Pandas DataFrame with a column that is a tz-aware TimeStamp and I tried to groupby(level=0).first(). I get an incorrect result. Am I missing something or is it a pandas bug?</p>
<pre><code>x = pd.DataFrame(index = [1,1,2,2,2], data = pd.date_range("7:00", "9:00", freq="30min", tz = 'US/Eastern'))
In [58]:... | 3 | 2016-09-08T19:31:01Z | 39,411,972 | <p>This is actually a pandas bug reported here:</p>
<p><a href="https://github.com/pydata/pandas/issues/10668" rel="nofollow">https://github.com/pydata/pandas/issues/10668</a></p>
| 0 | 2016-09-09T12:47:21Z | [
"python",
"pandas",
"timestamp"
] |
Permute list of lists with mixed elements (np.random.permutation() fails with ValueError) | 39,398,877 | <p>I'm trying to permute a list composed of sublists with mixed-type elements:</p>
<pre><code>import numpy as np
a0 = ['122', 877.503017, 955.471176, [21.701201, 1.315585]]
a1 = ['176', 1134.076908, 1125.504758, [19.436181, 0.9987899]]
a2 = ['177', 1038.686843, 1018.987868, [19.539959, 1.183997]]
a3 = ['178', 878.999... | 2 | 2016-09-08T19:34:35Z | 39,398,973 | <p>You need to convert your list to numpy arrays with with type <code>object()</code>, so that <code>random.permutation()</code> can interpret the lists as numpy types rather than sequence:</p>
<pre><code>>>> a = [np.array(i, dtype='object') for i in a]
>>>
>>> np.random.permutation(a)
arra... | 1 | 2016-09-08T19:40:22Z | [
"python",
"numpy",
"permutation"
] |
Permute list of lists with mixed elements (np.random.permutation() fails with ValueError) | 39,398,877 | <p>I'm trying to permute a list composed of sublists with mixed-type elements:</p>
<pre><code>import numpy as np
a0 = ['122', 877.503017, 955.471176, [21.701201, 1.315585]]
a1 = ['176', 1134.076908, 1125.504758, [19.436181, 0.9987899]]
a2 = ['177', 1038.686843, 1018.987868, [19.539959, 1.183997]]
a3 = ['178', 878.999... | 2 | 2016-09-08T19:34:35Z | 39,399,013 | <p>What about using <a href="http://docs.scipy.org/doc/numpy/reference/generated/numpy.random.shuffle.html" rel="nofollow">np.random.shuffle</a>?</p>
<pre><code># if you want the result in another list, otherwise just apply shuffle to a
b = a[:]
# shuffle the elements
np.random.shuffle(b)
# see the result of the shuff... | 2 | 2016-09-08T19:43:02Z | [
"python",
"numpy",
"permutation"
] |
Permute list of lists with mixed elements (np.random.permutation() fails with ValueError) | 39,398,877 | <p>I'm trying to permute a list composed of sublists with mixed-type elements:</p>
<pre><code>import numpy as np
a0 = ['122', 877.503017, 955.471176, [21.701201, 1.315585]]
a1 = ['176', 1134.076908, 1125.504758, [19.436181, 0.9987899]]
a2 = ['177', 1038.686843, 1018.987868, [19.539959, 1.183997]]
a3 = ['178', 878.999... | 2 | 2016-09-08T19:34:35Z | 39,399,107 | <p>random.shuffle() changes the list in place.</p>
<p>Python API methods that alter a structure in-place generally return None.</p>
<p>Please try <code>random.sample(a,len(a))</code></p>
<p>The code would look like:</p>
<pre><code>a = a[:]
b = random.sample(a,len(a))
</code></pre>
| 0 | 2016-09-08T19:50:12Z | [
"python",
"numpy",
"permutation"
] |
Permute list of lists with mixed elements (np.random.permutation() fails with ValueError) | 39,398,877 | <p>I'm trying to permute a list composed of sublists with mixed-type elements:</p>
<pre><code>import numpy as np
a0 = ['122', 877.503017, 955.471176, [21.701201, 1.315585]]
a1 = ['176', 1134.076908, 1125.504758, [19.436181, 0.9987899]]
a2 = ['177', 1038.686843, 1018.987868, [19.539959, 1.183997]]
a3 = ['178', 878.999... | 2 | 2016-09-08T19:34:35Z | 39,399,202 | <p>If you just want to create a random permutation of <code>a = [a0, a1, a2, a3]</code>, might I suggest permuting the indices instead?</p>
<pre><code>>>> random_indices = np.random.permutation(np.arange(len(a)))
>>> a_perm = [a[i] for i in random_indices]
... # Or just use the indices as you see fit... | 2 | 2016-09-08T19:56:21Z | [
"python",
"numpy",
"permutation"
] |
Difficulty accessing multi-dimensional array from JSON data | 39,398,913 | <p>Here is the JSON data in question:</p>
<pre><code>{
"result_index": 0,
"results": [
{
"alternatives": [
{
"confidence": 0.994,
"transcript": "thunderstorms could produce large hail isolated tornadoes and heavy rain "
}
],
"final": true
}
]
</code><... | 0 | 2016-09-08T19:36:19Z | 39,398,950 | <p>Your <code>results</code> and <code>alternatives</code> are not objects; but arrays of objects.</p>
<pre><code>print(parsed['results'][0]['alternatives'][0]['transcript'])
</code></pre>
| 1 | 2016-09-08T19:38:38Z | [
"python",
"json"
] |
Error setting dtypes of an array | 39,398,933 | <p>I was attempting to make a 1x5 numpy array with the following code</p>
<pre><code>testArray = np.array([19010913, "Hershey", "Bar", "Birthday", 12.34])
</code></pre>
<p>but encountered the unwanted result that</p>
<pre><code>testArray.dtype
dtype("<U8")
</code></pre>
<p>I want each column to be a specific dat... | 2 | 2016-09-08T19:37:36Z | 39,399,470 | <p>First off, I am not sure if <code>f10</code> is something known. </p>
<p>Note that structured arrays need to be defined as "list of tuples". Try the following:</p>
<pre><code>testArray = np.array([(19010913, "Hershey", "Bar", "Birthday", 12.34)],
dtype=[('f0','<i8'),('f1','<U64'),('f2','<U64'),('f3','<... | 1 | 2016-09-08T20:15:31Z | [
"python",
"arrays",
"numpy"
] |
How to preprocess and load a "big data" tsv file into a python dataframe? | 39,398,986 | <p>I am currently trying to import the following large tab-delimited file into a dataframe-like structure within Python---naturally I am using <code>pandas</code> dataframe, though I am open to other options. </p>
<p>This file is several GB in size, and is not a standard <code>tsv</code> file---it is broken, i.e. the ... | 2 | 2016-09-08T19:41:31Z | 39,399,727 | <pre><code>$ cat > pandas.awk
BEGIN {
PROCINFO["sorted_in"]="@ind_str_asc" # traversal order for for(i in a)
}
NR==1 { # the header cols is in the beginning of data file
# FORGET THIS: header cols from another file replace NR==1 with NR==FNR and see * below
split($0,a," ... | 4 | 2016-09-08T20:33:00Z | [
"python",
"pandas",
"awk",
"sed",
"dataframe"
] |
How to preprocess and load a "big data" tsv file into a python dataframe? | 39,398,986 | <p>I am currently trying to import the following large tab-delimited file into a dataframe-like structure within Python---naturally I am using <code>pandas</code> dataframe, though I am open to other options. </p>
<p>This file is several GB in size, and is not a standard <code>tsv</code> file---it is broken, i.e. the ... | 2 | 2016-09-08T19:41:31Z | 39,516,975 | <p>Another version which takes a separate column file as parameter or uses the first record. Run either way:</p>
<pre><code>awk -f pandas2.awk pandas.txt # first record as header
awk -f pandas2.awk cols.txt pandas.txt # first record from cols.txt
awk -v cols="cols.txt" -f pandas2.awk pandas.txt # read cols from cols.t... | 3 | 2016-09-15T17:24:51Z | [
"python",
"pandas",
"awk",
"sed",
"dataframe"
] |
How to preprocess and load a "big data" tsv file into a python dataframe? | 39,398,986 | <p>I am currently trying to import the following large tab-delimited file into a dataframe-like structure within Python---naturally I am using <code>pandas</code> dataframe, though I am open to other options. </p>
<p>This file is several GB in size, and is not a standard <code>tsv</code> file---it is broken, i.e. the ... | 2 | 2016-09-08T19:41:31Z | 39,523,179 | <p>You can do this more cleanly completely in Pandas.</p>
<p>Suppose you have two independent data frames with only one overlapping column:</p>
<pre><code>>>> df1
A B
0 1 2
>>> df2
B C
1 3 4
</code></pre>
<p>You can use <a href="http://pandas.pydata.org/pandas-docs/stable/merging.html#c... | 1 | 2016-09-16T03:04:31Z | [
"python",
"pandas",
"awk",
"sed",
"dataframe"
] |
My loss with fit_generator is 0.0000e+00 (using Keras) | 39,399,029 | <p>I am trying to use Keras on a âlargeâ dataset for my GPU. To do so, I make use of fit_generator, the problem is that my loss is 0.0000e+00 every time.</p>
<p>My print class and generator function:</p>
<pre><code>class printbatch(callbacks.Callback):
def on_batch_end(self, batch, logs={}):
if batch%... | 0 | 2016-09-08T19:44:15Z | 39,437,121 | <p>I solved this issue. The problem was that in '.theanorc' I had float16: this is not enough, so I changed it to float64 and now it works. </p>
<p>This is my '.theanorc' at the moment:</p>
<pre><code>[global]
device = gpu
floatX = float64
optimizer_including=cudnn
[lib]
cnmem=0.90
[blas]
ldflags = -L/usr/local/lib... | 0 | 2016-09-11T14:31:29Z | [
"python",
"deep-learning",
"keras",
"autoencoder"
] |
Python3 script not showing same result as MySQL engine for same query | 39,399,033 | <p>My python3 script is not generating the same result as MySQL. My query returns those rows whose value have changed over the week.</p>
<p>Python script:</p>
<pre><code>query = "SELECT cw.opportunityid, cw.probability, pw.probability, cw.stage, pw.stage, cw.amount, pw.amount, " \
"cw.closedate, pw.closedate " \
... | 0 | 2016-09-08T19:44:27Z | 39,399,465 | <p>A Python dictionary consists of unique key value pairs, so one key can just appear once in a dictionary. As your raw SQL query returns two distinct values from the same column in a single row, the second occurrence of the column overwrites the first in the dictionary. However, you can easily fix this by specifying a... | 1 | 2016-09-08T20:15:29Z | [
"python",
"mysql",
"sql",
"python-3.x"
] |
Django bulk_create a list of lists | 39,399,049 | <p>As the title indicates, is there a way to bulk_create list of lists. Like right now I bulk_create it like - </p>
<pre><code>for i in range(len(x))
arr1 = []
for m in range(len(y)):
arr1.append(DataModel(foundation=foundation, date=dates[m], price=price[m]))
DataModel.objects.bulk_create(arr1)
</code>... | 0 | 2016-09-08T19:45:32Z | 39,399,177 | <p>Append your object to <code>arr</code>, not <code>arr1</code>.<br>
Or you can make flat list before <code>bulk_create</code>:</p>
<pre><code>import itertools
arr = list(itertools.chain(*arr))
</code></pre>
| 0 | 2016-09-08T19:54:59Z | [
"python",
"django"
] |
Django bulk_create a list of lists | 39,399,049 | <p>As the title indicates, is there a way to bulk_create list of lists. Like right now I bulk_create it like - </p>
<pre><code>for i in range(len(x))
arr1 = []
for m in range(len(y)):
arr1.append(DataModel(foundation=foundation, date=dates[m], price=price[m]))
DataModel.objects.bulk_create(arr1)
</code>... | 0 | 2016-09-08T19:45:32Z | 39,399,222 | <p>Try this....</p>
<pre><code>arr = []
for i in range(len(x))
arr1 = []
for m in range(len(y)):
arr1.append(DataModel(foundation=foundation, date=dates[m], price=price[m]))
#instead of appending the list, add list together to make one
arr = arr + arr1
DataModel.objects.bulk_create(arr)
</code></pre>
... | 0 | 2016-09-08T19:57:49Z | [
"python",
"django"
] |
strip left and right in php | 39,399,069 | <p>I am converting the following python into php</p>
<p>the aim is to remove scores from a string like "Liverpool 1 v 0 Everton"</p>
<pre><code>home, away = event_data.get("desc").split(' v ')
# remove scores from event desc
if home.rsplit(' ', 1)[1].isdigit() and away.split(' ', 1)[0].isdigit():
event_name = ho... | 2 | 2016-09-08T19:46:53Z | 39,399,183 | <p>Using <code>preg_repalce</code> in PHP you can replace digits around <code>" v "</code>:</p>
<pre><code>$str = "Liverpool 1 v 0 Everton";
$event_name = preg_replace('/\h+\d+\h+v\h+\d+\h+/', ' v ', $str);
echo $event_name . "\n";
//=> Liverpool v Everton
</code></pre>
| 2 | 2016-09-08T19:55:19Z | [
"php",
"python",
"regex"
] |
Python+Selenium, can't click the 'button' wrapped by span | 39,399,266 | <p>I am new to selenium here. I am trying to use selenium to click a 'more' button to expand the review section everytime after refreshing the page. </p>
<p>The website is TripAdvisor. The logic of <code>more</code> button is, as long as you click on the first <code>more</code> button, it will automatically expand all... | 1 | 2016-09-08T20:00:31Z | 39,399,403 | <p>Try using an <a href="http://selenium-python.readthedocs.io/api.html#module-selenium.webdriver.common.action_chains" rel="nofollow"><code>ActionChains</code></a>:</p>
<pre><code>from selenium.webdriver.common.action_chains import ActionChains
# Your existing code here
# Minus the `button.click()` line
ActionChains(... | 0 | 2016-09-08T20:11:07Z | [
"python",
"selenium",
"onclick",
"css-selectors",
"webdriver"
] |
Python+Selenium, can't click the 'button' wrapped by span | 39,399,266 | <p>I am new to selenium here. I am trying to use selenium to click a 'more' button to expand the review section everytime after refreshing the page. </p>
<p>The website is TripAdvisor. The logic of <code>more</code> button is, as long as you click on the first <code>more</code> button, it will automatically expand all... | 1 | 2016-09-08T20:00:31Z | 39,399,507 | <blockquote>
<p>WebDriverException: Message: Element is not clickable at point (318.5, 7.100006103515625). Other element would receive the click....</p>
</blockquote>
<p>This error to be occur when element is not in the view port and selenium couldn't click due to some other overlay element on it. In this case you s... | 1 | 2016-09-08T20:18:25Z | [
"python",
"selenium",
"onclick",
"css-selectors",
"webdriver"
] |
Converting stdout stream to html (add <br> on linebreaks) | 39,399,281 | <p>I'm trying to take some console output text and render it through django/js in a modal on my site. When printing the console output the line breaks work fine, but when rendered on the site it shows them all as one line. I tried replacing all the \n with <code><br></code> but it didn't seem to have any effect. ... | 0 | 2016-09-08T20:01:48Z | 39,401,918 | <p>Simple mistake, I should have been passing the HTML, not the text. Also, adding pre tags to the text is much simpler than replacing all \n</p>
<pre><code>input_modal.find('.modal-body').html('Analysis complete'+response.console_output)
</code></pre>
| 0 | 2016-09-09T00:09:03Z | [
"javascript",
"python",
"html",
"django"
] |
Why is it considered bad practice to hardcode the name of a class inside that class's methods? | 39,399,372 | <p>In python, why is it a bad thing to do something like this:</p>
<pre><code>class Circle:
pi = 3.14159 # class variable
def __init__(self, r = 1):
self.radius = r
def area(self):
return Circle.pi * squared(self.radius)
def squared(base): return pow(base, 2)
</code></pre>
<p>The area method could be d... | 4 | 2016-09-08T20:08:46Z | 39,399,506 | <p>Because in case you subclass the class it will no longer refer to the class, but its parent. In your case it really doesn't make a difference, but in many cases it does:</p>
<pre><code>class Rectangle(object):
name = "Rectangle"
def print_name(self):
print(self.__class__.name) # or print(type(self).... | 4 | 2016-09-08T20:18:24Z | [
"python",
"oop"
] |
Why is it considered bad practice to hardcode the name of a class inside that class's methods? | 39,399,372 | <p>In python, why is it a bad thing to do something like this:</p>
<pre><code>class Circle:
pi = 3.14159 # class variable
def __init__(self, r = 1):
self.radius = r
def area(self):
return Circle.pi * squared(self.radius)
def squared(base): return pow(base, 2)
</code></pre>
<p>The area method could be d... | 4 | 2016-09-08T20:08:46Z | 39,399,604 | <p>I can name here two reasons </p>
<p>Inheritance</p>
<pre><code>class WeirdCircle(Circle):
pi = 4
c = WeirdCircle()
print(c.area())
# returning 4 with self.__class__.pi
# and 3.14159 with Circle.pi
</code></pre>
<p>When you want to rename the class, there is only one spot to modify. </p>
| 2 | 2016-09-08T20:24:51Z | [
"python",
"oop"
] |
Why is it considered bad practice to hardcode the name of a class inside that class's methods? | 39,399,372 | <p>In python, why is it a bad thing to do something like this:</p>
<pre><code>class Circle:
pi = 3.14159 # class variable
def __init__(self, r = 1):
self.radius = r
def area(self):
return Circle.pi * squared(self.radius)
def squared(base): return pow(base, 2)
</code></pre>
<p>The area method could be d... | 4 | 2016-09-08T20:08:46Z | 39,399,877 | <blockquote>
<p>Why is it considered bad practice to hardcode the name of a class inside that class's methods?</p>
</blockquote>
<p><strong>It's not.</strong> I don't know why you think it is.</p>
<p>There are plenty of good reasons to hardcode the name of a class inside its methods. For example, using <code>super<... | 2 | 2016-09-08T20:41:29Z | [
"python",
"oop"
] |
Why is it considered bad practice to hardcode the name of a class inside that class's methods? | 39,399,372 | <p>In python, why is it a bad thing to do something like this:</p>
<pre><code>class Circle:
pi = 3.14159 # class variable
def __init__(self, r = 1):
self.radius = r
def area(self):
return Circle.pi * squared(self.radius)
def squared(base): return pow(base, 2)
</code></pre>
<p>The area method could be d... | 4 | 2016-09-08T20:08:46Z | 39,399,961 | <p>Zen of python says keep your code as simple as possible to make it readable. Why to get into using the class name or super. If you just use self then it will refer the relevant class and print its relevant variable. Refer below code.</p>
<pre><code>class Rectangle(object):
self.name = "Rectangle"
def print_... | 0 | 2016-09-08T20:48:01Z | [
"python",
"oop"
] |
Fabric runs bash script that ask for sudo password - How to send this password | 39,399,393 | <p>I want to use fabric to deploy some application on remote machines. For this, I use fabric to retrieve a bash script from a VCS (bitbucket or github) and execute it. However, the first step of my script is to add the current user to the sudoers, so I am requested for a password.</p>
<p>Is it possible to send this p... | 0 | 2016-09-08T20:10:22Z | 39,437,636 | <p>Use fabric's "<strong>sudo</strong>" function instead of "<strong>run</strong>" function. Script won't prompt for password since it will be running with sudo privilege.</p>
<pre><code>def deploy():
env.hosts = ['192.168.100.160']
source_folder = '/home/username/src'
branch = 'dev'
puts('Pulling changes ... | 1 | 2016-09-11T15:23:47Z | [
"python",
"bash",
"fabric"
] |
Prime Sieve/pairs in a range | 39,399,396 | <p>I am trying to write a prime sieve generator that I convert to a list for printing and then print the primes in a given range. I'm pretty sure my number of pairs is correct but for some reason I am getting some extra values in my list of primes that aren't prime. (I caught this right away because my last value in th... | 0 | 2016-09-08T20:10:37Z | 39,399,682 | <p>your sieve function is incorrect. You mark all numbers as not prime, starting by "2".
You need to start by the next multiple of the prime which is <code>prime*prime</code></p>
<p>Hence, you have to start at <code>i*i</code> not <code>i</code> (I used <code>i*2</code> which works but is redundant because already cov... | 0 | 2016-09-08T20:29:56Z | [
"python",
"primes",
"sieve-of-eratosthenes",
"sieve"
] |
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