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 |
|---|---|---|---|---|---|---|---|---|---|
Python during runtime does not consider a number entered as a int or float | 39,497,067 | <p>I am a beginner and it might feel like a silly question. </p>
<p>I am trying to create a simple program,a temperature converter from Celsius to F*.</p>
<p>Which takes:</p>
<ol>
<li>'quit' for stopping program</li>
<li>int values for providing the correct result</li>
</ol>
<p>Problem: any text value entered by... | 0 | 2016-09-14T18:15:09Z | 39,497,230 | <p>You are using three nested while loops here for no obvious resons. When the user enters a wrong value, he gets transferred to the next while loop which never ends. This is a quick and dirty solution.</p>
<pre><code># Program to convert Celsius to Fahrenheit
import time
while True:
userinput= input(" 1 Enter ... | 0 | 2016-09-14T18:25:44Z | [
"python",
"input"
] |
Python during runtime does not consider a number entered as a int or float | 39,497,067 | <p>I am a beginner and it might feel like a silly question. </p>
<p>I am trying to create a simple program,a temperature converter from Celsius to F*.</p>
<p>Which takes:</p>
<ol>
<li>'quit' for stopping program</li>
<li>int values for providing the correct result</li>
</ol>
<p>Problem: any text value entered by... | 0 | 2016-09-14T18:15:09Z | 39,497,248 | <p>the problem is here:</p>
<pre><code>if type(userinput)!=str:
</code></pre>
<p>since input returns a string, userinput is always a string: Thus, the above snippet is always false.
you should try parsing it as a float like in <a href="http://stackoverflow.com/a/736050/5036612">this answer</a></p>
| 0 | 2016-09-14T18:26:38Z | [
"python",
"input"
] |
Python during runtime does not consider a number entered as a int or float | 39,497,067 | <p>I am a beginner and it might feel like a silly question. </p>
<p>I am trying to create a simple program,a temperature converter from Celsius to F*.</p>
<p>Which takes:</p>
<ol>
<li>'quit' for stopping program</li>
<li>int values for providing the correct result</li>
</ol>
<p>Problem: any text value entered by... | 0 | 2016-09-14T18:15:09Z | 39,497,259 | <p>Code after <strong><em>print('You cannot enter text, please use numbers')</em></strong> is not required. Due this code, it is stucked in infinite loop once you enter wrong input</p>
<p>Since input is asked in while loop, user input will be asked though the wrong input is given.</p>
<p><strong>Code (<em>Check comme... | 1 | 2016-09-14T18:27:09Z | [
"python",
"input"
] |
Python during runtime does not consider a number entered as a int or float | 39,497,067 | <p>I am a beginner and it might feel like a silly question. </p>
<p>I am trying to create a simple program,a temperature converter from Celsius to F*.</p>
<p>Which takes:</p>
<ol>
<li>'quit' for stopping program</li>
<li>int values for providing the correct result</li>
</ol>
<p>Problem: any text value entered by... | 0 | 2016-09-14T18:15:09Z | 39,497,298 | <p>In the 1 input, you cast it, in the second one, you never cast.</p>
<p>I also noticed, you never actually implemented the "quit" functionality for that loop. This should make your code a bit easier to read.</p>
<pre><code>def checkToClose(value):
if (value.lower() == 'quit')
quit()
while True:
userinput=... | 0 | 2016-09-14T18:29:12Z | [
"python",
"input"
] |
how to get partial text from a long tag using BeautifulSoup | 39,497,104 | <p>I have been studying a shopping website, and I want to extract the brandname and the product name from its html code like the following:</p>
<p><code><h1 class="product-name elim-suites">Chantecaille<span itemprop="name" >Limited Edition Protect the Lion Eye Palette</span></h1></code></p>
<... | 0 | 2016-09-14T18:18:21Z | 39,497,758 | <p>You can use <a href="https://www.crummy.com/software/BeautifulSoup/bs4/doc/#next-sibling-and-previous-sibling" rel="nofollow"><code>previous_sibling</code></a>, which gets the previous node that has the same parent (same level in the parse tree).</p>
<p>Also, instead of <code>findAll</code>, when you are searching ... | 0 | 2016-09-14T18:58:16Z | [
"python",
"parsing",
"beautifulsoup"
] |
how to get partial text from a long tag using BeautifulSoup | 39,497,104 | <p>I have been studying a shopping website, and I want to extract the brandname and the product name from its html code like the following:</p>
<p><code><h1 class="product-name elim-suites">Chantecaille<span itemprop="name" >Limited Edition Protect the Lion Eye Palette</span></h1></code></p>
<... | 0 | 2016-09-14T18:18:21Z | 39,498,119 | <p>You could use <em>get_text</em> and pass a character to separate the text or pull the text using <code>. h1.find(text=True, recursive=False)</code> on the <code>h1</code> and pull the text from the <em>span</em> directly:</p>
<pre><code>In [1]: h ="""<h1 class="product-name elim-suites">Chantecaille<span i... | 0 | 2016-09-14T19:21:53Z | [
"python",
"parsing",
"beautifulsoup"
] |
Get md5 from Owncloud with Webdav | 39,497,139 | <p>I'm using Webdav to synchronize files into my Owncloud. All working very fine. </p>
<p>But I need get MD5 from files in my result list. And i'm not having success in do this, and I not found nothing on owncloud's documentation. There are a way to receive the md5 file that's stored on owncloud?</p>
<p>I imagine it ... | 0 | 2016-09-14T18:20:33Z | 39,749,299 | <p>This is a method to get the hash. (I'm not sure this is the most correct way).</p>
<pre><code>\OC\Files\Filesystem::hash('md5',$path_to_file);
</code></pre>
<p>(ex. 8aed7f13a298b27cd2f9dba91eb0698a)</p>
| 1 | 2016-09-28T13:41:50Z | [
"python",
"webdav",
"owncloud"
] |
remove the default select in ForeignKey Field of django admin | 39,497,185 | <p>There are 150k entries in User model. When i am using it in django-admin without the raw_id_fields it is causing problem while loading all the entries as a select menu of foreign key. is there alternate way so that it could be loaded easily or could become searchable?</p>
<p>I have these models as of defined above ... | 0 | 2016-09-14T18:23:05Z | 39,522,788 | <p>you can use method formfield_for_foreignkey</p>
<p>something like this:</p>
<pre><code>class ProfileRecommendationAdmin(admin.ModelAdmin):
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == "user":
kwargs["queryset"] = User.objects.filter(is_superuser=True)
r... | 1 | 2016-09-16T02:03:06Z | [
"python",
"django",
"django-forms",
"django-admin"
] |
How to split an SSH address + path? | 39,497,199 | <p>A Python 3 function receives an SSH address like <code>[email protected]:/random/file/path</code>. I want to access this file with the <code>paramiko</code> lib, which needs the username, IP address, and file path separately.</p>
<p>How can I split this address into these 3 parts, knowing that the input will somet... | 1 | 2016-09-14T18:23:55Z | 39,500,132 | <h1>use</h1>
<p>not set(p).isdisjoint(set("0123456789$,")) where p is the SSH.</p>
| -2 | 2016-09-14T21:46:51Z | [
"python",
"python-3.x",
"parsing",
"ssh",
"ip-address"
] |
How to split an SSH address + path? | 39,497,199 | <p>A Python 3 function receives an SSH address like <code>[email protected]:/random/file/path</code>. I want to access this file with the <code>paramiko</code> lib, which needs the username, IP address, and file path separately.</p>
<p>How can I split this address into these 3 parts, knowing that the input will somet... | 1 | 2016-09-14T18:23:55Z | 39,504,811 | <p><code>str.partition</code> and <code>rpartition</code> will do what you want:</p>
<pre><code>def ssh_splitter(ssh_connect_string):
user_host, _, path = ssh_connect_string.partition(':')
user, _, host = user_host.rpartition('@')
return user, host, path
print(ssh_splitter('[email protected]:/random/file... | 2 | 2016-09-15T06:58:37Z | [
"python",
"python-3.x",
"parsing",
"ssh",
"ip-address"
] |
Django migrations - change model from Int to CharField and pre-populate from choice option | 39,497,266 | <p>In a model, I have an <code>IntegerField</code> that is mapped to a <code>CHOICES</code> tuple. The requirements for that field have changed to the point that updating the options in that tuple will require too frequent maintenance, so I've decided to alter it to a <code>CharField</code></p>
<p>Is there a way I ca... | 1 | 2016-09-14T18:27:34Z | 39,497,453 | <p>You've changed your Schema so you'll definitely need a Schema migration and Django will do that for you, with the <code>makemigrations</code> command.</p>
<p>But since you're also changing the type of a column, in which is filled with integers and now should be cast to characters, Django won't do that automatically... | 1 | 2016-09-14T18:38:27Z | [
"python",
"django",
"django-migrations"
] |
Django migrations - change model from Int to CharField and pre-populate from choice option | 39,497,266 | <p>In a model, I have an <code>IntegerField</code> that is mapped to a <code>CHOICES</code> tuple. The requirements for that field have changed to the point that updating the options in that tuple will require too frequent maintenance, so I've decided to alter it to a <code>CharField</code></p>
<p>Is there a way I ca... | 1 | 2016-09-14T18:27:34Z | 39,500,672 | <p>To make it more clear, you need 3 migrations.</p>
<ol>
<li>for Schema migration - adding a new field.</li>
<li>for Data migration - You can use the link below which is perfect example for data migration.</li>
<li>for Schema migration - deleting the old field.</li>
</ol>
<p>Here is the example I've followed before ... | 0 | 2016-09-14T22:36:06Z | [
"python",
"django",
"django-migrations"
] |
Python- can't connect to my IP | 39,497,282 | <p>I started learning about computer networks and I tried using sockets in Python.
With a little help from a youtube video, I made a very simple Chatting program between a Server and a Client.
When I tried to connect the client with 'localhost', it worked just the way I wanted. But when I tried using the IP address (th... | 0 | 2016-09-14T18:28:35Z | 39,497,515 | <p>You issue is likely related to the network. The IP you posted is what is called a routable IP, the IP exposed to the internet. It normally gets assigned to the WAN side of your ISP provided modem or a router. Machines like your PC will normally live on the LAN side of the network device and will likely be assigned a... | 0 | 2016-09-14T18:42:16Z | [
"python",
"sockets",
"networking",
"ip"
] |
Python - Function Calls involving Object Inheritance | 39,497,300 | <p>Suppose I have a parent class <code>foo</code> and an inheriting class <code>bar</code> defined as such:</p>
<pre><code>class foo(object):
def __init__(self, args):
for key in args.keys():
setattr(self, key, args[key])
self.subinit()
def subunit(self):
pass
...
</code></pre>
... | 0 | 2016-09-14T18:29:17Z | 39,497,641 | <p>To answer my own question, I ran a test after adjusting the example a little:</p>
<pre><code>class foo(object):
def __init__(self, args):
for key in args.keys():
setattr(self, key, args[key])
self.subinit()
def subinit(self):
pass
</code></pre>
<hr>
<pre><code>class bar(foo):
... | 0 | 2016-09-14T18:51:12Z | [
"python",
"class",
"inheritance",
"scope",
"initialization"
] |
How to loop through a list of dictionary, and print out every key and value pair in Ansible | 39,497,351 | <p>I have an list of dictionary in Ansible config</p>
<pre><code>myList
- name: Bob
age: 25
- name: Alice
age: 18
address: USA
</code></pre>
<p>I write code as</p>
<pre><code>- name: loop through
debug: msg ="{{item.key}}:{{item.value}}"
with_items: "{{ myList }}"
</code></pre>
<p>I wa... | 2 | 2016-09-14T18:32:42Z | 39,497,784 | <p>Here is your text:
myList
- name: Bob
age: 25
- name: Alice
age: 18
address: USA</p>
<p>Here is the Answer:</p>
<blockquote>
<blockquote>
<blockquote>
<p>text='''myList
- name: Bob
age: 25
- name: Alice
age: 18
address: U... | 0 | 2016-09-14T18:59:44Z | [
"python",
"ansible"
] |
How to loop through a list of dictionary, and print out every key and value pair in Ansible | 39,497,351 | <p>I have an list of dictionary in Ansible config</p>
<pre><code>myList
- name: Bob
age: 25
- name: Alice
age: 18
address: USA
</code></pre>
<p>I write code as</p>
<pre><code>- name: loop through
debug: msg ="{{item.key}}:{{item.value}}"
with_items: "{{ myList }}"
</code></pre>
<p>I wa... | 2 | 2016-09-14T18:32:42Z | 39,498,994 | <pre><code>class Person(object):
def __init__(self, name, age, address):
self.name = name
self.age = age
self.address = address
def __str__(self):
# String Representation of your Data.
return "name:%s age:%d address:%s" % (self.name, self.age, self.address)
</code></pre>
<p>then you can have a... | 0 | 2016-09-14T20:19:52Z | [
"python",
"ansible"
] |
How to loop through a list of dictionary, and print out every key and value pair in Ansible | 39,497,351 | <p>I have an list of dictionary in Ansible config</p>
<pre><code>myList
- name: Bob
age: 25
- name: Alice
age: 18
address: USA
</code></pre>
<p>I write code as</p>
<pre><code>- name: loop through
debug: msg ="{{item.key}}:{{item.value}}"
with_items: "{{ myList }}"
</code></pre>
<p>I wa... | 2 | 2016-09-14T18:32:42Z | 39,500,368 | <p>If you want to loop through the list and parse every item separately:</p>
<pre><code>- debug: msg="{{ item | dictsort | map('join',':') | join(' ') }}"
with_items: "{{ myList }}"
</code></pre>
<p>Will print:</p>
<pre><code>"msg": "age:25 name:Bob"
"msg": "address:USA age:18 name:Alice"
</code></pre>
<p>If you ... | 3 | 2016-09-14T22:06:00Z | [
"python",
"ansible"
] |
How to loop through a list of dictionary, and print out every key and value pair in Ansible | 39,497,351 | <p>I have an list of dictionary in Ansible config</p>
<pre><code>myList
- name: Bob
age: 25
- name: Alice
age: 18
address: USA
</code></pre>
<p>I write code as</p>
<pre><code>- name: loop through
debug: msg ="{{item.key}}:{{item.value}}"
with_items: "{{ myList }}"
</code></pre>
<p>I wa... | 2 | 2016-09-14T18:32:42Z | 39,500,408 | <p>You can use a Jinja2 template:</p>
<pre><code>vars:
myList:
- name: Bob
age: 25
- name: Alice
age: 18
address: USA
tasks:
- debug: msg="{% for item in myList %}{% if not loop.first %} {% endif %}{% for key, value in item.items() %}{% if not loop.first %} {% endif %}{{ key }}:{{ value}}... | 0 | 2016-09-14T22:09:31Z | [
"python",
"ansible"
] |
Not all the links are triggering AJAX call, only the first one does in Python Flask Application | 39,497,363 | <p>I have strange issue with the AJAX that I have implemented for the 'like' and 'unlike' buttons in the python flask application. Below is the code for the .html and .js files.</p>
<p>.html</p>
<pre><code>{% for article in articles %}
{% if article._id in likes %}
<button data-toggle="tooltip" title="Unlike... | 0 | 2016-09-14T18:33:20Z | 39,648,574 | <p>Well, there are more than one html elements with the same id, so all events will fire only for first of them. </p>
<p>Just use classes in html: </p>
<pre><code>{% for article in articles %}
{% if article._id in likes %}
<button class="unlike-button" ...></button>
{% else %}
<... | 1 | 2016-09-22T20:44:41Z | [
"javascript",
"jquery",
"python",
"ajax"
] |
python regex matching between multiple lines and every other match | 39,497,375 | <p>So I've been playing around with this for a few days and here is what I am looking for and the regex I have now. I have a file in this format (there are some other fields but I have omitted those:</p>
<p>I just want to match the bold text </p>
<pre><code>ADDR 1 - XXXXXX ADDR 1 - **XXXXXX**
ADDR 2 - XXXXXX AD... | 2 | 2016-09-14T18:33:48Z | 39,497,633 | <p><strong>Code:</strong></p>
<pre><code>import re
str= """
ADDR 1 - XXXXXX ADDR 1 - ABCDEF
ADDR 2 - XXXXXX ADDR 2 - XXXXXX
ADDR 1 - XXXXXX ADDR 1 - UVWXYZ
ADDR 2 - XXXXXX ADDR 2 - XXXXXX
"""
m = re.findall(r".*ADDR\s+1\s+-\s+(.*)",str)
print m
</code></pre>
<p><strong>Output:</strong></p>
<pre><code>C:\Users\d... | 3 | 2016-09-14T18:50:37Z | [
"python",
"regex"
] |
python regex matching between multiple lines and every other match | 39,497,375 | <p>So I've been playing around with this for a few days and here is what I am looking for and the regex I have now. I have a file in this format (there are some other fields but I have omitted those:</p>
<p>I just want to match the bold text </p>
<pre><code>ADDR 1 - XXXXXX ADDR 1 - **XXXXXX**
ADDR 2 - XXXXXX AD... | 2 | 2016-09-14T18:33:48Z | 39,499,216 | <p>If wanting to capture every other instance of something then splitting or slicing the string is going to be <strong>much faster</strong> than using regex â the following demonstrates a very <em>basic</em> example:</p>
<p><strong><em>split()</em></strong> method:</p>
<pre><code>>>> [i.split('ADDR 1 - ')[... | 1 | 2016-09-14T20:33:58Z | [
"python",
"regex"
] |
ImageDraw.draw.line() : SystemError: new style getargs format but argument is not a tuple | 39,497,458 | <p>I saw multiple questions on this but was not able to find answer to my problem. Basically I just want to draw a line on an image taking the co-ordinates from a external file in python. And here goes my code :</p>
<pre><code>import Image, ImageDraw
import sys
import csv
im = Image.open("screen.png")
draw = ImageDraw... | 0 | 2016-09-14T18:38:37Z | 39,497,707 | <p>Looks like just few <code>int(...)</code> were missing?</p>
<pre><code>--- a.py.ORIG 2016-09-14 20:54:47.442291244 +0200
+++ a.py 2016-09-14 20:53:34.990627259 +0200
@@ -1,4 +1,4 @@
-import Image, ImageDraw
+from PIL import Image, ImageDraw
import sys
import csv
im = Image.open("screen.png")
@@ -8,13 +8,13 ... | 0 | 2016-09-14T18:55:17Z | [
"python"
] |
Get Subset of MultiIndex Pandas DataFrame with Single Index Boolean Indexer | 39,497,487 | <p>If I have this dataframe</p>
<pre><code>import pandas as pd
tuples_index = [(1,1990), (2,1999), (2,2002), (3,1992), (3,1994), (3,1996)]
index = pd.MultiIndex.from_tuples(tuples_index, names=['id', 'FirstYear'])
df = pd.DataFrame([2007, 2006, 2006, 2000, 2000, 2000], index=index, columns=['LastYear'] )
df
Out[2]:
... | 3 | 2016-09-14T18:40:27Z | 39,497,629 | <p>Use <code>groupby</code> and <code>transform</code> to build a mask</p>
<pre><code>df[df.groupby(level=0).transform(np.size).gt(1).values]
</code></pre>
<p><a href="http://i.stack.imgur.com/Zmwup.png" rel="nofollow"><img src="http://i.stack.imgur.com/Zmwup.png" alt="enter image description here"></a></p>
| 1 | 2016-09-14T18:50:05Z | [
"python",
"pandas"
] |
Angle between two vectors 3D? python | 39,497,496 | <p>I am new in python.
I have two vectors in 3d space, and I want to know the angle between two</p>
<p>I tried:</p>
<pre><code>vec1=[x1,y1,z1]
vec2=[x2,y2,z2]
angle=np.arccos(np.dot(vec1,vec2)/(np.linalg.norm(vec1)*np.linalg.norm(vec2)))
</code></pre>
<p>but when change the order, vec2,vec1 obtain the same angle a... | 1 | 2016-09-14T18:41:15Z | 39,497,577 | <p>The dot product is commutative, so you'll have to use a different metric. It doesn't care about the order.</p>
| 0 | 2016-09-14T18:46:49Z | [
"python",
"python-2.7",
"numpy",
"computational-geometry"
] |
Angle between two vectors 3D? python | 39,497,496 | <p>I am new in python.
I have two vectors in 3d space, and I want to know the angle between two</p>
<p>I tried:</p>
<pre><code>vec1=[x1,y1,z1]
vec2=[x2,y2,z2]
angle=np.arccos(np.dot(vec1,vec2)/(np.linalg.norm(vec1)*np.linalg.norm(vec2)))
</code></pre>
<p>but when change the order, vec2,vec1 obtain the same angle a... | 1 | 2016-09-14T18:41:15Z | 39,497,695 | <p>Since the dot product is <a href="https://en.wikipedia.org/wiki/Dot_product#Properties" rel="nofollow">commutative</a>, simply reversing the order you put the variables into the function will not work. </p>
<p>If your objective is to find the obtuse(larger) angle rather than the acute(smaller) one, subtract the val... | 0 | 2016-09-14T18:54:39Z | [
"python",
"python-2.7",
"numpy",
"computational-geometry"
] |
Angle between two vectors 3D? python | 39,497,496 | <p>I am new in python.
I have two vectors in 3d space, and I want to know the angle between two</p>
<p>I tried:</p>
<pre><code>vec1=[x1,y1,z1]
vec2=[x2,y2,z2]
angle=np.arccos(np.dot(vec1,vec2)/(np.linalg.norm(vec1)*np.linalg.norm(vec2)))
</code></pre>
<p>but when change the order, vec2,vec1 obtain the same angle a... | 1 | 2016-09-14T18:41:15Z | 39,528,809 | <p>What you are asking is impossible as the plane that contains the angle can be oriented two ways and nothing in the input data gives a clue about it.</p>
<p>All you can do is to compute the smallest angle between the vectors (or its complement to 360°), and swapping the vectors can't have an effect.</p>
<p>The dot... | 1 | 2016-09-16T10:06:00Z | [
"python",
"python-2.7",
"numpy",
"computational-geometry"
] |
Angle between two vectors 3D? python | 39,497,496 | <p>I am new in python.
I have two vectors in 3d space, and I want to know the angle between two</p>
<p>I tried:</p>
<pre><code>vec1=[x1,y1,z1]
vec2=[x2,y2,z2]
angle=np.arccos(np.dot(vec1,vec2)/(np.linalg.norm(vec1)*np.linalg.norm(vec2)))
</code></pre>
<p>but when change the order, vec2,vec1 obtain the same angle a... | 1 | 2016-09-14T18:41:15Z | 39,533,085 | <p>Use a function to help you choose which angle do you want. In the beggining of your code, write:</p>
<pre><code>def angle(v1, v2, acute):
# v1 is your firsr vector
# v2 is your second vector
angle = np.arccos(np.dot(v1, v2) / (np.linalg.norm(v1) * np.linalg.norm(v2)))
if (acute == True):
return angl... | 0 | 2016-09-16T13:46:40Z | [
"python",
"python-2.7",
"numpy",
"computational-geometry"
] |
is python dict.items() threadsafe? | 39,497,583 | <p>Python raises an exception if a dictionary changes its size during iteration using <code>iteritems()</code>.</p>
<p>I am hit by this problem since my program is <em>multithreaded</em> and there are cases that I need to iterate over the <code>dict</code> while another thread is adding keys into the <code>dict</code>... | 0 | 2016-09-14T18:47:24Z | 39,505,359 | <p>As the excellent comments noted:</p>
<ol>
<li><p>This is not thread safe.</p></li>
<li><p>You should really use a lock when doing such things.</p></li>
</ol>
<p>It is possible to see this in <a href="https://svn.python.org/projects/python/trunk/Objects/dictobject.c" rel="nofollow">the CPython source code, <code>di... | 0 | 2016-09-15T07:31:19Z | [
"python",
"multithreading",
"dictionary"
] |
can I have a global variable in python without declaring it as global? | 39,497,628 | <p>I want some sort of a global state that maintains the current number, as well as a function to generate the next number.</p>
<p>I can write a generator to give me the next number. </p>
<pre><code> def gen(self, n):
yield n
yield n + 1
</code></pre>
<p>but what is a clean way to maintain its state? I do no... | 0 | 2016-09-14T18:50:04Z | 39,497,973 | <p>If my understanding is correct, to eliminate the <code>global</code> counter you could create a closure for you variable and return a function that increments it. </p>
<p>The original function <code>counter</code> is called only once, consecutive calls simply increment the counter:</p>
<pre><code>def count(n):
... | 0 | 2016-09-14T19:11:12Z | [
"python",
"python-3.x",
"generator",
"counter"
] |
can I have a global variable in python without declaring it as global? | 39,497,628 | <p>I want some sort of a global state that maintains the current number, as well as a function to generate the next number.</p>
<p>I can write a generator to give me the next number. </p>
<pre><code> def gen(self, n):
yield n
yield n + 1
</code></pre>
<p>but what is a clean way to maintain its state? I do no... | 0 | 2016-09-14T18:50:04Z | 39,498,290 | <p>Or you can use the next(generator) function.</p>
<pre><code>def num_gen():
n=1
while n:
yield n
n += 1
</code></pre>
<p>Then</p>
<pre><code>>>my_gen = num_gen()
>>next(my_gen)
1
>>next(my_gen)
2
</code></pre>
<p>And so forth. Whenever a generator yields a value, the sta... | 0 | 2016-09-14T19:32:34Z | [
"python",
"python-3.x",
"generator",
"counter"
] |
can I have a global variable in python without declaring it as global? | 39,497,628 | <p>I want some sort of a global state that maintains the current number, as well as a function to generate the next number.</p>
<p>I can write a generator to give me the next number. </p>
<pre><code> def gen(self, n):
yield n
yield n + 1
</code></pre>
<p>but what is a clean way to maintain its state? I do no... | 0 | 2016-09-14T18:50:04Z | 39,498,527 | <p>If you want to maintain state across multiple instances of <code>Count</code>, then use a variable in the class scope, and reference it with the <code>Count.</code> prefix, like this:</p>
<pre><code>class Count:
curr = 0
def __init__(self, startWith = None):
if startWith is not None: Count.curr = s... | 0 | 2016-09-14T19:47:39Z | [
"python",
"python-3.x",
"generator",
"counter"
] |
How to close the chrome window that is opened by applying the code webbrowser.open? | 39,497,632 | <p>I imported webbrowser in the very beginning of this file. The whole code was like this in the below.</p>
<pre><code>import time
import webbrowser
break_times = 3
break_count = 0
print ("Program started at: " + time.ctime())
while break_count < break_times :
time.sleep(5)
webbrowser.open("https://www.... | 1 | 2016-09-14T18:50:36Z | 39,497,985 | <p>Try using <code>selenium</code>.</p>
<pre><code>import time
from selenium import webdriver
break_times = 3
break_count = 0
browser = webdriver.Firefox()
print("Program started at: " + time.ctime())
while break_count < break_times:
time.sleep(5)
browser.get("https://www.youtube.com/watch?v=m69d-KNi2Q0"... | 0 | 2016-09-14T19:12:01Z | [
"python",
"import"
] |
How to call class methods from different instantiations in parallel in Python 2.7? | 39,497,652 | <p>I have a class which contains functions that perform calculations. If I have several instances of these objects, how do I make the calculations to go in parallel?</p>
<pre><code>class SomeClass:
def __init__(self, arg):
....
def compute(self):
....
</code></pre>
<p>And then in a different script:</... | 1 | 2016-09-14T18:51:38Z | 39,498,744 | <p>On python2.7 you'll have to define a worker function that calls the compute method on the given argument, then you can use it with <code>pool.map()</code>:</p>
<pre><code>def call_compute(o):
return o.compute()
...
result = pool.map(call_compute, [g1, g2])
</code></pre>
<p>On python3 (tested on 3.5) it's possi... | 0 | 2016-09-14T20:01:45Z | [
"python",
"python-2.7",
"multiprocessing",
"python-multiprocessing"
] |
Multiple Inheritance With Same Method Names but Different Arguments Creates TypeError | 39,497,656 | <p>I have a four distinct classes. There is a main base/parent class, two main classes that inherit from this parent class, and another class that inherits from both of these main classes. If I have a method with the same name but a different number of arguments as a parent class, I get a TypeError.</p>
<pre><code># E... | 1 | 2016-09-14T18:51:50Z | 39,497,749 | <p>Consider this line:</p>
<pre><code>ChildTwo.method(self, arg)
</code></pre>
<p>You passed in <code>self</code> explicitly. <code>self</code> here is a reference to a <code>ChildThree</code> instance. Later, in the body of <code>ChildTwo.method</code>:</p>
<pre><code>if self.check(arg):
</code></pre>
<p>It's th... | 1 | 2016-09-14T18:57:44Z | [
"python",
"class",
"inheritance",
"typeerror"
] |
Multiple Inheritance With Same Method Names but Different Arguments Creates TypeError | 39,497,656 | <p>I have a four distinct classes. There is a main base/parent class, two main classes that inherit from this parent class, and another class that inherits from both of these main classes. If I have a method with the same name but a different number of arguments as a parent class, I get a TypeError.</p>
<pre><code># E... | 1 | 2016-09-14T18:51:50Z | 39,498,049 | <p>This type of inheritance is called <a href="https://en.wikipedia.org/wiki/Multiple_inheritance#The_diamond_problem" rel="nofollow">"The Diamond Problem"</a>. It is a topic for itself, so I'll explain on a simpler case:</p>
<pre><code>class C1(object):
def check(self, arg):
return 1
def method(self,... | 1 | 2016-09-14T19:16:25Z | [
"python",
"class",
"inheritance",
"typeerror"
] |
Python file path based on dates | 39,497,717 | <p>Creating a script that will automatically process the file path for that day, perform some actions, and then save to the same directory. </p>
<p>Folder structure is based on Date:</p>
<p><code>maindir</code> -> <code>year</code> -> <code>month</code> -> files for that month.</p>
<p>So far, my approach would be:</... | 0 | 2016-09-14T18:55:51Z | 39,499,003 | <p>Since the path contains only Year and Month, the directory would remain same for 30 consecutive days on average.</p>
<p>Hence it would be better to check if the directory already exists, before creating it.</p>
<pre><code>if not os.path.exists(directory):
os.makedirs(directory)
</code></pre>
| 1 | 2016-09-14T20:20:32Z | [
"python",
"windows"
] |
Understanding index out of range Python | 39,497,726 | <p>Hello thanks in advance.</p>
<p>i can get my code to work but i need help understanding what the problem is.</p>
<p>i am doing a test questions on codingbat and came across this one.</p>
<p>Return the number of times that the string "code" appears anywhere in the given string, accept any letter for the 'd', so "c... | -1 | 2016-09-14T18:56:11Z | 39,497,946 | <p>This is just a feature of slicing strings in Python. Notice that</p>
<pre><code>stringvar = 'aaacodebbb'
stringvar[10000:10001]
</code></pre>
<p>returns an empty string value and no error.</p>
<p>However, </p>
<pre><code>stringvar[10000]
</code></pre>
<p><em>will</em> return an error.</p>
<p>As explained in th... | 0 | 2016-09-14T19:09:47Z | [
"python"
] |
Understanding index out of range Python | 39,497,726 | <p>Hello thanks in advance.</p>
<p>i can get my code to work but i need help understanding what the problem is.</p>
<p>i am doing a test questions on codingbat and came across this one.</p>
<p>Return the number of times that the string "code" appears anywhere in the given string, accept any letter for the 'd', so "c... | -1 | 2016-09-14T18:56:11Z | 39,497,960 | <p>When you say <code>mystring[x:y]</code>, that is called <em>slicing</em>, which has built-in bounds checking.</p>
<p>But a plain list index such as <code>mystring[99]</code> does not have built-in bounds checking, so you get an <code>IndexError</code>.</p>
| 0 | 2016-09-14T19:10:33Z | [
"python"
] |
Unsupported operand type for - list and list | 39,497,815 | <p>I am using an older version of python which doesnt have support to subtract dict's.</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
</code></pre>
<p>Basically my code looks like this:</p>
<pre><code> for key in d1.keys():
if key in d2:
d3[key]=d1[key]-d2[key]... | -3 | 2016-09-14T19:01:32Z | 39,497,942 | <p>Try the following:</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
d3={}
for key in d1.keys():
if key in d2:
d3[key] = [str(int(d1[key][i]) - int(d2[key][i])) for i in xrange(len(d1[key]))]
print d3
</code></pre>
| 0 | 2016-09-14T19:09:30Z | [
"python",
"python-2.7"
] |
Unsupported operand type for - list and list | 39,497,815 | <p>I am using an older version of python which doesnt have support to subtract dict's.</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
</code></pre>
<p>Basically my code looks like this:</p>
<pre><code> for key in d1.keys():
if key in d2:
d3[key]=d1[key]-d2[key]... | -3 | 2016-09-14T19:01:32Z | 39,497,957 | <p>Get the first values from the list and cast them to <code>int</code>s.</p>
<pre><code>d1 = {'ab': ['3'], 'hij': ['1200']}
d2 = {'ab': ['1'], 'hij': ['600']}
d3 = {}
for key in d1.keys():
if key in d2:
d3[key] = int(d1[key][0]) - int(d2[key][0])
print d3
</code></pre>
<p>Output:</p>
<pre><code>{'hij'... | 0 | 2016-09-14T19:10:27Z | [
"python",
"python-2.7"
] |
Unsupported operand type for - list and list | 39,497,815 | <p>I am using an older version of python which doesnt have support to subtract dict's.</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
</code></pre>
<p>Basically my code looks like this:</p>
<pre><code> for key in d1.keys():
if key in d2:
d3[key]=d1[key]-d2[key]... | -3 | 2016-09-14T19:01:32Z | 39,498,077 | <p>You can't subtract lists like so. </p>
<p>You could instead use a <em>dictionary comprehensio</em>n and then <code>zip</code> the lists so you can then subtract their content:</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
d3 = {k: ['{}'.format(int(i) - int(j)) for i, j in zip(d... | 0 | 2016-09-14T19:18:23Z | [
"python",
"python-2.7"
] |
Unsupported operand type for - list and list | 39,497,815 | <p>I am using an older version of python which doesnt have support to subtract dict's.</p>
<pre><code>d1={'ab': ['3'], 'hij': ['1200']}
d2={'ab': ['1'], 'hij': ['600']}
</code></pre>
<p>Basically my code looks like this:</p>
<pre><code> for key in d1.keys():
if key in d2:
d3[key]=d1[key]-d2[key]... | -3 | 2016-09-14T19:01:32Z | 39,498,357 | <p>Have you tried looking at d1[key] and d2[key] to get an idea of what the error is about ? Well if not you should have, that's the first step of debugging code: looking where it failed and what was involved in the failure.</p>
<p>So the explaination of your problem is the following d1['ab'] is not a number, it is a ... | 0 | 2016-09-14T19:36:24Z | [
"python",
"python-2.7"
] |
Python running setup.py through cmd doesn't work? | 39,497,856 | <p>So I'm trying to install via cmd using a setup.py file..
<a href="http://i.stack.imgur.com/OrvUA.png" rel="nofollow"><img src="http://i.stack.imgur.com/OrvUA.png" alt=""></a></p>
<p>However, when I try to install it through CMD, this happens:
<a href="http://i.stack.imgur.com/90xNn.png" rel="nofollow"><img src="htt... | -2 | 2016-09-14T19:03:51Z | 39,497,900 | <p>The first way you were trying to install it is correct <code>python setup.py install</code>, however you need Python 2.x for this installer to work. You are in a Python 3.2 environment and it appears that this module has not been updated to work with Python3 at this time.</p>
<p><a href="http://ocemp.sourceforge.ne... | 1 | 2016-09-14T19:06:28Z | [
"python"
] |
Write a series of SQL queries to single csv in python | 39,497,887 | <p>Basically I want to create a single csv file from several SQL queries. What I have so far:</p>
<pre><code>import pyodbc
import csv
import itertools
conn = pyodbc.connect("user")
cur = conn.cursor()
sql_queries = ['query_1', 'query_2', 'query_3']
columns = []
rows = []
for query in sql_queries:
cur.execute(que... | 0 | 2016-09-14T19:05:45Z | 39,500,021 | <p>This answer is assuming that the variable <code>rows</code> contains a list of list of tuples like this <code>[[('xx', 'xx'), ('xx', 'xx'), ('xx', 'xx')], [('yy',), ('yy',)], [('zz',)]]</code> and that you're working with Python2</p>
<pre><code>from itertools import izip_longest
rows = [[('xx', 'xx'), ('xx', 'xx')... | 0 | 2016-09-14T21:37:56Z | [
"python",
"sql",
"csv"
] |
Xlsx Writer getting corrupted with Strings | 39,497,898 | <p>I am currently exporting a dataframe to an excel spreadsheet, but my one of my columns which has long strings with varying lengths cause the file to get corrupted. </p>
<pre><code>with pd.ExcelWriter('thing.xlsx'.format(path), engine='xlsxwriter',options={'strings_to_urls': False}) as writer:
</code></pre>
<p>Here... | 1 | 2016-09-14T19:06:23Z | 39,536,829 | <p>as @jmcnamara remarked my issue was that one of my strings was not encoded in UTF-8, but after encoding all the strings the excel file ceased to be corrupted</p>
| 1 | 2016-09-16T17:10:36Z | [
"python",
"pandas",
"dataframe",
"xlsxwriter"
] |
Find how many words start with certain letter in a list | 39,497,934 | <p>I am trying to output the total of how many words start with a letter <code>'a'</code> in a list from a separate text file. I'm looking for an output such as this. </p>
<pre><code>35 words start with a letter 'a'.
</code></pre>
<p>However, i'm outputting all the words that start with an <code>'a'</code> instead of... | 0 | 2016-09-14T19:09:10Z | 39,498,053 | <p>You could replace this with a <code>sum</code> call in which you feed <code>1</code> for every word in <code>wordList</code> that starts with <code>a</code>:</p>
<pre><code>print(sum(1 for w in wordList if w.startswith('a')), 'start with the letter "a"')
</code></pre>
<p>This can be further trimmed down if you use... | 3 | 2016-09-14T19:16:46Z | [
"python",
"list",
"python-3.x"
] |
Find how many words start with certain letter in a list | 39,497,934 | <p>I am trying to output the total of how many words start with a letter <code>'a'</code> in a list from a separate text file. I'm looking for an output such as this. </p>
<pre><code>35 words start with a letter 'a'.
</code></pre>
<p>However, i'm outputting all the words that start with an <code>'a'</code> instead of... | 0 | 2016-09-14T19:09:10Z | 39,498,130 | <p>You are using the <code>a_words</code> as the value of the word in each iteration and missing a counter. If we change the for loop to have <code>words</code> as the value and reserved <code>a_words</code> for the counter, we can increment the counter each time the criteria is passed. You could change <code>a_words</... | 2 | 2016-09-14T19:22:34Z | [
"python",
"list",
"python-3.x"
] |
Find how many words start with certain letter in a list | 39,497,934 | <p>I am trying to output the total of how many words start with a letter <code>'a'</code> in a list from a separate text file. I'm looking for an output such as this. </p>
<pre><code>35 words start with a letter 'a'.
</code></pre>
<p>However, i'm outputting all the words that start with an <code>'a'</code> instead of... | 0 | 2016-09-14T19:09:10Z | 39,498,319 | <p><code>sum(generator)</code> is a way to go, but for completeness sake, you may want to do it with list comprehension (maybe if it's slightly more readable or you want to do something with words starting with <em>a</em> etc.).</p>
<pre><code>words_starting_with_a = [word for word in word_list if word.startswith('a')... | 1 | 2016-09-14T19:34:21Z | [
"python",
"list",
"python-3.x"
] |
Find how many words start with certain letter in a list | 39,497,934 | <p>I am trying to output the total of how many words start with a letter <code>'a'</code> in a list from a separate text file. I'm looking for an output such as this. </p>
<pre><code>35 words start with a letter 'a'.
</code></pre>
<p>However, i'm outputting all the words that start with an <code>'a'</code> instead of... | 0 | 2016-09-14T19:09:10Z | 39,498,404 | <p>Simple alternative solution using <code>re.findall</code> function(without splitting text and <code>for</code> loop):</p>
<pre><code>import re
...
words = wordsFile.read()
...
total = len(re.findall(r'\ba\w+?\b', words))
print('Total number of words that start with a letter "a" : ', total)
</code></pre>
| 0 | 2016-09-14T19:39:31Z | [
"python",
"list",
"python-3.x"
] |
Where's the logic that returns an instance of a subclass of OSError exception class? | 39,498,031 | <p>I've been hunting for something that could be relatively stupid to some people, but to me very interesting! :-)</p>
<p>Input and output errors have been merged with <code>OSError</code> in Python 3.3, so there's a change in the exception class hierarchy. One interesting feature about the builtin class <code>OSError... | 7 | 2016-09-14T19:14:54Z | 39,498,441 | <p>You can't change the behavior of <code>OSError</code> from Python because it's not implemented in Python.</p>
<p>For classes implemented in Python, you can write <code>__new__</code> so it only returns a subclass if it's being called on the base class. Then the behavior won't be inherited.</p>
<pre><code>class MyC... | 0 | 2016-09-14T19:41:22Z | [
"python"
] |
Where's the logic that returns an instance of a subclass of OSError exception class? | 39,498,031 | <p>I've been hunting for something that could be relatively stupid to some people, but to me very interesting! :-)</p>
<p>Input and output errors have been merged with <code>OSError</code> in Python 3.3, so there's a change in the exception class hierarchy. One interesting feature about the builtin class <code>OSError... | 7 | 2016-09-14T19:14:54Z | 39,500,064 | <p>You're correct that <code>errnomap</code> is the variable that holds the mapping from errno values to <code>OSError</code> subclasses, but unfortunately it's not exported outside the <code>exceptions.c</code> source file, so there's no portable way to modify it.</p>
<hr>
<p>It <em>is</em> possible to access it usi... | 5 | 2016-09-14T21:42:12Z | [
"python"
] |
Simple python telnet client/server example doesn't work | 39,498,117 | <p>I'm trying to create mockup telnet server (for some functional testing of existing code). Right now I only modified server welcome message and I was trying to read this message using client code, but it read method fails on timeout with no additional info. But with pudb debugger enabled it works most of the time...<... | 0 | 2016-09-14T19:21:52Z | 40,003,240 | <p>Be sure there is actually connecting going on. To do that put edit your code to add <strong>tn.set_debuglevel(100)</strong> into your script to look like this:</p>
<pre><code>import telnetlib
HOST = '127.0.0.1'
PORT = 8023
# from pudb import set_trace; set_trace()
tn = telnetlib.Telnet(HOST, PORT)
tn.set_debugleve... | 0 | 2016-10-12T16:04:23Z | [
"python",
"telnetlib"
] |
How do I use a while loop to add a variable every time it loops? | 39,498,152 | <p>I'm writing a program that tells the user to input the amount of rooms that a property has, and then a while loop finds out the width and length of each room. I feel like I need the while loop to create two extra variables to store the width and length every time it iterates, however I can not figure out how.
here i... | 0 | 2016-09-14T19:24:04Z | 39,498,363 | <p>Thinking you want the length and breadth to be saved by the room number, I would do something like this:</p>
<pre><code>rooms = {}
print("Please answer the questions to find the floor size.")
rooms = int(input("How many rooms has the property got?:\n"))
for room_num in range(1, rooms+1):
length = int(input("... | 0 | 2016-09-14T19:37:00Z | [
"python",
"variables",
"while-loop"
] |
How do I use a while loop to add a variable every time it loops? | 39,498,152 | <p>I'm writing a program that tells the user to input the amount of rooms that a property has, and then a while loop finds out the width and length of each room. I feel like I need the while loop to create two extra variables to store the width and length every time it iterates, however I can not figure out how.
here i... | 0 | 2016-09-14T19:24:04Z | 39,498,447 | <p>I'd recommend going for a <code>Room</code> class. Then you can define an <code>area</code> method on it. </p>
<pre><code>class Room():
def __init__(self, w, l):
self.width = w
self.length = l
def area(self):
return self.width * self.length
</code></pre>
<p>Then, for your input, st... | 0 | 2016-09-14T19:41:49Z | [
"python",
"variables",
"while-loop"
] |
How do I use a while loop to add a variable every time it loops? | 39,498,152 | <p>I'm writing a program that tells the user to input the amount of rooms that a property has, and then a while loop finds out the width and length of each room. I feel like I need the while loop to create two extra variables to store the width and length every time it iterates, however I can not figure out how.
here i... | 0 | 2016-09-14T19:24:04Z | 39,498,590 | <p>I'd do it this way.</p>
<pre><code>rooms_total = int(input('How many rooms?'))
rooms_info = list()
for i in range(rooms_total):
length = int(input('Length for room #{}?'.format(i)))
width = int(input('Width for room #{}?'.format(i)))
rooms_info.append({'length': length, 'width': width})
space = sum([x... | 0 | 2016-09-14T19:51:22Z | [
"python",
"variables",
"while-loop"
] |
How do I use a while loop to add a variable every time it loops? | 39,498,152 | <p>I'm writing a program that tells the user to input the amount of rooms that a property has, and then a while loop finds out the width and length of each room. I feel like I need the while loop to create two extra variables to store the width and length every time it iterates, however I can not figure out how.
here i... | 0 | 2016-09-14T19:24:04Z | 39,498,592 | <p>From your question it seems like this is what you want:</p>
<pre><code> print("Please answer the questions to find the floor size.")
numberOfRooms = int(input("How many rooms has the property got?: "))
currentRoomNumber = 0
roomLengths = list()
while currentRoomNumber < numberOfRooms:
... | 1 | 2016-09-14T19:51:26Z | [
"python",
"variables",
"while-loop"
] |
Python 2.7.9 Getting error:TypeError: argument must be 9-item sequence, not datetime.datetime | 39,498,169 | <p>This is occurring on the following code line:</p>
<p><code>epoch_time = int(time.mktime(time.strptime( time.strftime( "%Y-%m-%d %H:%M:%S", status.sensorBGLTimestamp ), '%Y-%m-%d %H:%M:%S').timetuple()) - time.timezone )</code></p>
<p>Anyone able to help with why?</p>
| 0 | 2016-09-14T19:25:12Z | 39,498,265 | <p>If you are trying to simply get the epoch time, you should use</p>
<pre><code>import calendar
import time
calendar.timegm(time.gmtime())
</code></pre>
<p><strong>Returns:</strong>
<code>1473881423</code></p>
| 0 | 2016-09-14T19:31:12Z | [
"python",
"datetime",
"time"
] |
Append to each dictionary within a list | 39,498,211 | <p>I have a list of dictionary objects:</p>
<pre><code>[{u'ID': 46757,
u'currentenddate': u'09/30/2016',
u'name': u'Project A',
u'projstartdate': u'05/01/2016'},
{u'ID': 46625,
u'currentenddate': u'07/15/2016',
u'name': u'Project B',
u'projstartdate': u'05/02/2016'},
{u'ID': 47100,
u'currentenddate': u... | 2 | 2016-09-14T19:27:33Z | 39,498,414 | <p>Something like this could do the trick.</p>
<pre><code>result = [dict(data, client_id='') for data in list_of_dicts]
</code></pre>
| 1 | 2016-09-14T19:40:05Z | [
"python",
"list",
"dictionary"
] |
Append to each dictionary within a list | 39,498,211 | <p>I have a list of dictionary objects:</p>
<pre><code>[{u'ID': 46757,
u'currentenddate': u'09/30/2016',
u'name': u'Project A',
u'projstartdate': u'05/01/2016'},
{u'ID': 46625,
u'currentenddate': u'07/15/2016',
u'name': u'Project B',
u'projstartdate': u'05/02/2016'},
{u'ID': 47100,
u'currentenddate': u... | 2 | 2016-09-14T19:27:33Z | 39,498,476 | <p>A <strong>Python 3.5</strong> solution showcasing the new dict <em>unpacking</em>. </p>
<pre><code>[{**dict_element, **{u'client_id':u'12398'}} for dict_element in your_list]
</code></pre>
<p>Check <a href="https://www.python.org/dev/peps/pep-0448/" rel="nofollow">this</a>.</p>
<p><strong>Demo</strong></p>
<pre>... | -1 | 2016-09-14T19:44:12Z | [
"python",
"list",
"dictionary"
] |
I don't understand this python build synax "python3 setup.py build" | 39,498,250 | <p>Can someone please explain this build syntax here?</p>
<pre><code>python3 setup.py build
sudo python3 setup.py install
</code></pre>
<p>Source: <a href="http://askubuntu.com/a/406410/327339">http://askubuntu.com/a/406410/327339</a></p>
<p>I just used the instructions at the source above to install pygame in pytho... | 1 | 2016-09-14T19:30:29Z | 39,498,563 | <p>From my use of Python in the terminal, this command tells Python 'python3', so whatever version of Python 3.x your system is running, 'setup.py' is the Python script you're running and 'build' and 'install' are part of the distutils module to make it easier to install modules.</p>
| 0 | 2016-09-14T19:49:47Z | [
"python",
"python-3.x",
"build",
"install"
] |
Înitialising dictionary like class | 39,498,302 | <pre><code>class fileInfo(dict):
def __init__(self, name, typ, size = 1):
self = {}
self["name"] = name
self["type"] = typ
self["size"] = size
def __getitem__(self, key):
if key == "name":
return dict.__getitem__(self, "name")+ "." + dict.__getitem__(self, "t... | 2 | 2016-09-14T19:33:15Z | 39,498,333 | <p>This line doesn't do what you think it does:</p>
<pre><code> self = {}
</code></pre>
<p>That line creates a new object of type <code>dict</code>, and binds the local name <code>self</code> to it. This is wholly unrelated to the previous value of <code>self</code>, which is lost. And, since <code>self</code> is ... | 2 | 2016-09-14T19:35:18Z | [
"python",
"dictionary",
"initialization"
] |
Înitialising dictionary like class | 39,498,302 | <pre><code>class fileInfo(dict):
def __init__(self, name, typ, size = 1):
self = {}
self["name"] = name
self["type"] = typ
self["size"] = size
def __getitem__(self, key):
if key == "name":
return dict.__getitem__(self, "name")+ "." + dict.__getitem__(self, "t... | 2 | 2016-09-14T19:33:15Z | 39,498,430 | <p>The <code>__init__</code> method of any class is called once you create an instance of the class. You can't call it manually to instantiate the class, but use the class name.</p>
<p>Also, you are not really initializing a class that inherits it's methods and properties from <code>dict</code>. You need to use <a hre... | 0 | 2016-09-14T19:40:56Z | [
"python",
"dictionary",
"initialization"
] |
How to use pymongo command updateUser | 39,498,500 | <p>How do i use pymongo command updateUser ?</p>
<p>I've tried the following commands but with no success:</p>
<pre><code>db.command({'updateUser': 'my_user','update':{'$set':{"pwd":"my_pwd"}}})
</code></pre>
<p>And </p>
<pre><code>db.command('updateUser', {"updateUser":"my_user","pwd":"my_pwd"})
</code></pre>
<p>... | 1 | 2016-09-14T19:45:35Z | 39,503,243 | <p>The python code is executing the MongoDB command "updateUser" on the database side. The command being executed in your code doesn't match the syntax shown in the <a href="https://docs.mongodb.com/manual/reference/command/updateUser/" rel="nofollow">updateUser documentation</a>.</p>
<p>Try the following: </p>
<pre>... | 0 | 2016-09-15T04:40:57Z | [
"python",
"linux",
"mongodb",
"pymongo-3.x"
] |
How can I create a new file containing a list with a single line of code? | 39,498,525 | <p>I know this is probably very easy to do, but I am very new to coding. I can accomplish this in more than one line, but for my assignment it needs to be done in one line.</p>
<p>This is what I have, which raises an error that I don't understand.</p>
<pre><code>trees = open('trees.txt', 'w').write["Tree1", "Tree2", ... | 1 | 2016-09-14T19:47:31Z | 39,498,613 | <p>Just apply <code>write</code> on the file handle. To get proper text and not python list representation, you have to join the list into multiline text (if it's what you want!).</p>
<p>Your fixed code (not the best there is, though):</p>
<pre><code>open('trees.txt', 'w').write("\n".join(["Tree1", "Tree2", "Tree3"])... | 2 | 2016-09-14T19:53:03Z | [
"python",
"list"
] |
PyCharm Error Loading Package List | 39,498,602 | <p>I just downloaded PyCharm the other day and wanted to download a few packages. I'm using Windows 10 with PyCharm 2016.2.2 and python 3.5.2. When I go to the available packages screen it continually states:</p>
<blockquote>
<p>Error loading package list:pypi.python.org</p>
</blockquote>
<p>I was just trying to do... | 1 | 2016-09-14T19:52:28Z | 39,498,957 | <p>This was an issue this past summer: <a href="https://intellij-support.jetbrains.com/hc/en-us/community/posts/207207469-PyCharm-interpreter-can-t-find-new-packages" rel="nofollow">https://intellij-support.jetbrains.com/hc/en-us/community/posts/207207469-PyCharm-interpreter-can-t-find-new-packages</a></p>
<p>Have you... | 0 | 2016-09-14T20:17:40Z | [
"python",
"pycharm",
"pypi"
] |
PyCharm Error Loading Package List | 39,498,602 | <p>I just downloaded PyCharm the other day and wanted to download a few packages. I'm using Windows 10 with PyCharm 2016.2.2 and python 3.5.2. When I go to the available packages screen it continually states:</p>
<blockquote>
<p>Error loading package list:pypi.python.org</p>
</blockquote>
<p>I was just trying to do... | 1 | 2016-09-14T19:52:28Z | 39,499,006 | <p>You should update to PyCharm 2016.2.3</p>
<p><code>Help -> Check for Updates...</code></p>
| 0 | 2016-09-14T20:20:50Z | [
"python",
"pycharm",
"pypi"
] |
Drop null rows with dtype object from a DataFrame with Pandas | 39,498,689 | <p>I have a DataFrame that looks like this:</p>
<pre><code>Oper ST result
T2 9:24:09 NaN
T3 9:25:10 Fail
T4 9:25:36 Pass
T5 9:25:36 NaN
</code></pre>
<p>I want to drop the NaN rows from the 'result' column. All columns are dtype object:</p>
<pre><code>df.dtypes
Oper object
ST object
result object
<... | 2 | 2016-09-14T19:57:56Z | 39,498,743 | <p><code>dropna</code> does not work in-place: you have to assign the result to the dataframe itself or it will be lost:</p>
<pre><code> df = df.dropna(subset=['result'])
</code></pre>
| 2 | 2016-09-14T20:01:38Z | [
"python",
"pandas"
] |
Passing arguments to Python from Shell Script | 39,498,702 | <p>I wrote a small shell script that looks like:</p>
<pre><code>cd models/syntaxnet
var1=$(jq --raw-output '.["avl_text"]' | syntaxnet/demo.sh)
echo $var1
python /home/sree/python_code1.py $var1
</code></pre>
<p>My <code>python_code1.py</code> looks like:</p>
<p>import sys</p>
<pre><code>data = sys.argv[1]
print "I... | 1 | 2016-09-14T19:58:40Z | 39,498,877 | <p>If there is space in between argument and argument is not in quotes, then python consider as two different arguments.</p>
<p>That's why the output of print data in the python code is just 1.</p>
<p>Check the below output.</p>
<pre><code>[root@dsp-centos ~]# python dsp.py Dinesh Pundkar
In python code
Dinesh
[root... | 1 | 2016-09-14T20:10:48Z | [
"python",
"shell",
"arguments"
] |
Passing arguments to Python from Shell Script | 39,498,702 | <p>I wrote a small shell script that looks like:</p>
<pre><code>cd models/syntaxnet
var1=$(jq --raw-output '.["avl_text"]' | syntaxnet/demo.sh)
echo $var1
python /home/sree/python_code1.py $var1
</code></pre>
<p>My <code>python_code1.py</code> looks like:</p>
<p>import sys</p>
<pre><code>data = sys.argv[1]
print "I... | 1 | 2016-09-14T19:58:40Z | 39,498,894 | <p>Use Join and list slicing</p>
<pre><code>import sys
data = ' '.join(sys.argv[1:])
print "In python code"
print data
print type(data)
</code></pre>
| 1 | 2016-09-14T20:12:57Z | [
"python",
"shell",
"arguments"
] |
Compute the running max for a dataframe in pandas | 39,498,729 | <p>Given:</p>
<pre class="lang-py prettyprint-override"><code>d = {
'High': [954,
953,
952,
955,
956,
952,
951,
950,
]
}
df = pandas.DataFrame(d)
</code></pre>
<p>I want to add another column which is the max at... | 3 | 2016-09-14T20:01:06Z | 39,498,794 | <p>Use <code>cummax</code></p>
<pre><code>df.High.cummax()
0 954
1 954
2 954
3 955
4 956
5 956
6 956
7 956
Name: High, dtype: int64
</code></pre>
<hr>
<pre><code>df['Max'] = df.High.cummax()
df
</code></pre>
<p><a href="http://i.stack.imgur.com/IfnS4.png" rel="nofollow"><img src="http://i.s... | 4 | 2016-09-14T20:04:42Z | [
"python",
"pandas"
] |
Computed static property in python | 39,498,891 | <p>Is it possible to have a static property on a class that would be computed as a one off. The idea would be to be able to do it like so:</p>
<pre><code>class Foo:
static_prop = Foo.one_off_static_method()
@staticmethod
def one_off_static_method():
return 'bar'
</code></pre>
<p>I thought of usin... | 3 | 2016-09-14T20:12:23Z | 39,498,950 | <p>Until the class is actually created, <code>one_off_static_method</code> is just a regular function. It needs to be defined before you attempt to call it, since you want to call it while the <code>class</code> statement is being executed. Once you are done with it, you can simply delete it.</p>
<pre><code>class Foo:... | 1 | 2016-09-14T20:16:57Z | [
"python",
"static-methods"
] |
Computed static property in python | 39,498,891 | <p>Is it possible to have a static property on a class that would be computed as a one off. The idea would be to be able to do it like so:</p>
<pre><code>class Foo:
static_prop = Foo.one_off_static_method()
@staticmethod
def one_off_static_method():
return 'bar'
</code></pre>
<p>I thought of usin... | 3 | 2016-09-14T20:12:23Z | 39,499,163 | <p>If you want it computed at class definition time, see <a href="http://stackoverflow.com/a/39498950/674039">chepner's answer</a> - although I would recommend just to use a module level function instead.</p>
<p>If you want it lazily evaluated, then you might be interested in a <a href="https://pypi.python.org/pypi/ca... | 2 | 2016-09-14T20:30:42Z | [
"python",
"static-methods"
] |
Computed static property in python | 39,498,891 | <p>Is it possible to have a static property on a class that would be computed as a one off. The idea would be to be able to do it like so:</p>
<pre><code>class Foo:
static_prop = Foo.one_off_static_method()
@staticmethod
def one_off_static_method():
return 'bar'
</code></pre>
<p>I thought of usin... | 3 | 2016-09-14T20:12:23Z | 39,499,304 | <p>Here you go, I made a small descriptor for you :-)</p>
<p>Upon accessing the attribute, it will be computed and cached.</p>
<pre><code>class CachedStaticProperty:
"""Works like @property and @staticmethod combined"""
def __init__(self, func):
self.func = func
def __get__(self, inst, owner):
... | 0 | 2016-09-14T20:39:32Z | [
"python",
"static-methods"
] |
Unable to subset Pandas dataframe | 39,498,923 | <p>I have the following data in a data frame named <code>in_file</code>:</p>
<pre><code>Client Value_01 Value_02 Date
ABC 100 500 2016-09-01T
ABC 14 90 2016-09-02T
DEF 95 1000 2016-09-01T
DEF 200 600 2016-09-02T
GHI 75 19 2016-09-... | 2 | 2016-09-14T20:15:26Z | 39,499,047 | <p>including <code>isin()</code>:</p>
<pre><code>In [28]: in_file.loc[(in_file.Date == '2016-09-01T') & in_file.Client.isin(['ABC', 'DEF'])].sort_values('Value_01', ascending=False)
Out[28]:
Client Value_01 Value_02 Date
0 ABC 100 500 2016-09-01T
2 DEF 95 1000 2016-09-01... | 2 | 2016-09-14T20:22:52Z | [
"python",
"pandas",
"subset"
] |
Unable to subset Pandas dataframe | 39,498,923 | <p>I have the following data in a data frame named <code>in_file</code>:</p>
<pre><code>Client Value_01 Value_02 Date
ABC 100 500 2016-09-01T
ABC 14 90 2016-09-02T
DEF 95 1000 2016-09-01T
DEF 200 600 2016-09-02T
GHI 75 19 2016-09-... | 2 | 2016-09-14T20:15:26Z | 39,499,119 | <p>You have two conflicting conditions for your second subset dataframe</p>
<p><code>(in_file.Client == 'ABC')</code> & <code>(in_file.Client == 'DEF')</code></p>
<p>Can never both be true at the same time. </p>
<p>What you seem to be looking for is 'or' logic not '&' logic. So </p>
<p><code>df_02 = in_file... | 0 | 2016-09-14T20:27:41Z | [
"python",
"pandas",
"subset"
] |
Unable to subset Pandas dataframe | 39,498,923 | <p>I have the following data in a data frame named <code>in_file</code>:</p>
<pre><code>Client Value_01 Value_02 Date
ABC 100 500 2016-09-01T
ABC 14 90 2016-09-02T
DEF 95 1000 2016-09-01T
DEF 200 600 2016-09-02T
GHI 75 19 2016-09-... | 2 | 2016-09-14T20:15:26Z | 39,499,133 | <p><strong><em>Caveat</em></strong> This is not the best solution!!!<br>
I only want to point out what you were doing wrong.<br>
@MaxU has the best answer</p>
<p>define <code>cond2</code></p>
<pre><code>cond2 = (in_file.Date == '2016-09-01T') & \
(in_file.Client == 'ABC') & \
(in_file.Client =... | 0 | 2016-09-14T20:28:45Z | [
"python",
"pandas",
"subset"
] |
Join all PostgreSQL tables and make a Python dictionary | 39,498,948 | <p>I need to join <strong>all</strong> PostgreSQL tables and convert them in a Python dictionary. There are 72 tables in the database. The total number of columns is greater than <strong>1600</strong>. </p>
<p>I wrote a simple Python script that joins several tables but fails to join all of them due to <a href="https:... | 5 | 2016-09-14T20:16:56Z | 39,499,237 | <p>I'm not certain this will help, but you can try <code>pd.concat</code></p>
<pre><code>raw_dict = pd.concat([d.set_index('USER_ID') for d in df_arr], axis=1)
</code></pre>
<p>Or, to get a bit more disctinction</p>
<pre><code>raw_dict = pd.concat([d.set_index('USER_ID') for d in df_arr], axis=1, keys=sql_tables)
</... | 0 | 2016-09-14T20:35:05Z | [
"python",
"database",
"postgresql",
"pandas",
"elasticsearch"
] |
Join all PostgreSQL tables and make a Python dictionary | 39,498,948 | <p>I need to join <strong>all</strong> PostgreSQL tables and convert them in a Python dictionary. There are 72 tables in the database. The total number of columns is greater than <strong>1600</strong>. </p>
<p>I wrote a simple Python script that joins several tables but fails to join all of them due to <a href="https:... | 5 | 2016-09-14T20:16:56Z | 39,499,314 | <p>Why don't you create a postgres function instead of script?</p>
<p>Here are some advises that could help you to avoid the memory error:</p>
<ul>
<li>You can use <strong>WITH</strong> clause which makes better use of your memory.</li>
<li>You can create some physical tables for storing the information of
different ... | 1 | 2016-09-14T20:40:07Z | [
"python",
"database",
"postgresql",
"pandas",
"elasticsearch"
] |
Date and Time Python (Stuck) | 39,499,079 | <p>I am Python beginner. I have a question about Date and time code:</p>
<pre><code>import datetime
date = datetime.date.today()
print(date.strftime('date is %d%b,%Y'))
</code></pre>
<p>Now I want to print the date of my own choice. How can I do it? </p>
<p>For example, if today's date is (15 sep 2016) and I want to... | 1 | 2016-09-14T20:24:51Z | 39,499,117 | <p>You may do it like so:</p>
<pre><code>>>> from datetime import date
>>> date(year=1998, month=10, day=23)
datetime.date(1998, 10, 23)
>>> _.strftime('date is %d %b,%Y')
'date is 23 Oct,1998'
</code></pre>
<p>As per <a href="https://docs.python.org/3/library/datetime.html#datetime.date" r... | 1 | 2016-09-14T20:27:39Z | [
"python"
] |
Date and Time Python (Stuck) | 39,499,079 | <p>I am Python beginner. I have a question about Date and time code:</p>
<pre><code>import datetime
date = datetime.date.today()
print(date.strftime('date is %d%b,%Y'))
</code></pre>
<p>Now I want to print the date of my own choice. How can I do it? </p>
<p>For example, if today's date is (15 sep 2016) and I want to... | 1 | 2016-09-14T20:24:51Z | 39,499,156 | <p>You can initialize date using datetime constructor.</p>
<pre><code>>>>import datetime
>>>d = datetime.datetime(1998,10,23)
>>>print(d.strftime('date is %d %b,%Y'))
</code></pre>
| 0 | 2016-09-14T20:30:27Z | [
"python"
] |
Date and Time Python (Stuck) | 39,499,079 | <p>I am Python beginner. I have a question about Date and time code:</p>
<pre><code>import datetime
date = datetime.date.today()
print(date.strftime('date is %d%b,%Y'))
</code></pre>
<p>Now I want to print the date of my own choice. How can I do it? </p>
<p>For example, if today's date is (15 sep 2016) and I want to... | 1 | 2016-09-14T20:24:51Z | 39,499,203 | <p>If you needed to take a string value as input you can use</p>
<pre><code>from dateutil import parser
datestring = "23 Oct 1998"
customDate = parser.parse(datestring)
print(customDate.strftime('date is %d%b,%y'))
</code></pre>
| 0 | 2016-09-14T20:33:10Z | [
"python"
] |
plotly - changing the line styles | 39,499,173 | <p>I am trying to plot multiple yet related things on a plotly graph. </p>
<p>I want to differentiate and relate the lines at the same time. To make myself more clearer, I am plotting ROC characteristics of the classifiers that I trained. I want a particular classifier of the same color but different line styles for t... | 0 | 2016-09-14T20:31:34Z | 39,499,306 | <p>It is because the plotly, plots the data based on the mode which you ask it to do. If you say <code>mode=markers</code> it is going to plot just the markers. If you say <code>mode=lines</code> it is going the join all the points in the data and plot it as lines.</p>
<p>Please see this page <a href="https://plot.ly/... | 0 | 2016-09-14T20:39:32Z | [
"python",
"plot",
"plotly",
"roc"
] |
numpy.genfromtxt- ValueError- Line # (got n columns instead of m) | 39,499,231 | <p>So, I've been writing up code to read in a dataset from a file and separate it out for analysis. </p>
<p>The data in question is read from a .dat file, and looks like this:</p>
<pre><code>14 HO2 O3 OH O2 O2
15 HO2 HO2 H2O2 O2
16 H2O2 OH ... | 3 | 2016-09-14T20:34:50Z | 39,500,178 | <p>Looks like you've already read <code>genfromtxt</code> about missing values. Does it say anything about the use of delimiters?</p>
<p>I think it can handle missing values with lines like</p>
<pre><code>'one, 1, 234.4, , ,'
'two, 3, , 4, 5'
</code></pre>
<p>but when the delimiter is the default 'white-space' it c... | 2 | 2016-09-14T21:49:48Z | [
"python",
"numpy",
"genfromtxt"
] |
numpy.genfromtxt- ValueError- Line # (got n columns instead of m) | 39,499,231 | <p>So, I've been writing up code to read in a dataset from a file and separate it out for analysis. </p>
<p>The data in question is read from a .dat file, and looks like this:</p>
<pre><code>14 HO2 O3 OH O2 O2
15 HO2 HO2 H2O2 O2
16 H2O2 OH ... | 3 | 2016-09-14T20:34:50Z | 39,502,405 | <p>It looks like your data is nicely aligned in fields of exactly 10 characters. If that is always the case, you can tell <code>genfromtxt</code> the field widths to use by specifying the sequence of field widths in the <code>delimiter</code> argument.</p>
<p>Here's an example.</p>
<p>First, your data file:</p>
<pr... | 0 | 2016-09-15T02:45:33Z | [
"python",
"numpy",
"genfromtxt"
] |
Write to a file with sudo privileges in Python | 39,499,233 | <p>The following code throws an error if it's run by a non-root user for a file owned by root, even when the non-root user has sudo privileges:</p>
<pre><code>try:
f = open(filename, "w+")
except IOError:
sys.stderr.write('Error: Failed to open file %s' % (filename))
f.write(response + "\n" + new_line)
f.close()
<... | 5 | 2016-09-14T20:34:54Z | 39,499,327 | <p>Your script is limited to the permissions it is run with as you cannot change users without already having root privileges.</p>
<p>As Rob said, the only way to do this without changing your file permissions is to run with <code>sudo</code>.</p>
<pre><code>sudo python ./your_file.py
</code></pre>
| 0 | 2016-09-14T20:41:07Z | [
"python",
"file-writing",
"ioerror"
] |
Write to a file with sudo privileges in Python | 39,499,233 | <p>The following code throws an error if it's run by a non-root user for a file owned by root, even when the non-root user has sudo privileges:</p>
<pre><code>try:
f = open(filename, "w+")
except IOError:
sys.stderr.write('Error: Failed to open file %s' % (filename))
f.write(response + "\n" + new_line)
f.close()
<... | 5 | 2016-09-14T20:34:54Z | 39,499,692 | <p>You have a few options:</p>
<ul>
<li>Run your script as root or with sudo</li>
<li>Set the setuid bit and have root own the script (although on many systems this won't work with scripts, and then the script will be callable by anyone)</li>
<li>Detect that you're not running as root (<code>os.geteuid() != 0</code>),... | 1 | 2016-09-14T21:10:53Z | [
"python",
"file-writing",
"ioerror"
] |
Write to a file with sudo privileges in Python | 39,499,233 | <p>The following code throws an error if it's run by a non-root user for a file owned by root, even when the non-root user has sudo privileges:</p>
<pre><code>try:
f = open(filename, "w+")
except IOError:
sys.stderr.write('Error: Failed to open file %s' % (filename))
f.write(response + "\n" + new_line)
f.close()
<... | 5 | 2016-09-14T20:34:54Z | 39,499,718 | <p>Having possibility to using <code>sudo</code> don't give you any privileges if you don't actually use it. So as other guys suggested you probably should just start your program with use of <code>sudo</code>. But if you don't like this idea (I don't see any reason for that) you can do other trick.</p>
<p>Your script... | 0 | 2016-09-14T21:12:43Z | [
"python",
"file-writing",
"ioerror"
] |
what is the wrong with my Dividing Sequences code | 39,499,275 | <p>I am trying to code this problem: </p>
<blockquote>
<p>This problem is about sequences of positive integers a1,a2,...,aN. A
subsequence of a sequence is anything obtained by dropping some of the
elements. For example, 3,7,11,3 is a subsequence of
6,3,11,5,7,4,3,11,5,3 , but 3,3,7 is not a subsequence of
6... | 0 | 2016-09-14T20:37:37Z | 39,499,582 | <p>As <code>j < i</code>, you need to check whether <code>a[j]</code> is a divider of <code>a[i]</code>, not vice versa. So this means you need to put this condition (and <em>only</em> this one, not combined with the inverse):</p>
<pre><code> if (ar[i]%ar[j]==0):
</code></pre>
<p>With this change the output... | 3 | 2016-09-14T21:01:14Z | [
"python",
"algorithm"
] |
what is the wrong with my Dividing Sequences code | 39,499,275 | <p>I am trying to code this problem: </p>
<blockquote>
<p>This problem is about sequences of positive integers a1,a2,...,aN. A
subsequence of a sequence is anything obtained by dropping some of the
elements. For example, 3,7,11,3 is a subsequence of
6,3,11,5,7,4,3,11,5,3 , but 3,3,7 is not a subsequence of
6... | 0 | 2016-09-14T20:37:37Z | 39,500,806 | <p>For the graph theory solution I alluded to in a comment:</p>
<pre><code>class Node(object):
def __init__(self, x):
self.x = x
self.children = []
def add_child(self, child_x):
# Not actually used here, but a useful alternate constructor!
new = self.__class__(child_x)
... | 0 | 2016-09-14T22:50:33Z | [
"python",
"algorithm"
] |
what is the wrong with my Dividing Sequences code | 39,499,275 | <p>I am trying to code this problem: </p>
<blockquote>
<p>This problem is about sequences of positive integers a1,a2,...,aN. A
subsequence of a sequence is anything obtained by dropping some of the
elements. For example, 3,7,11,3 is a subsequence of
6,3,11,5,7,4,3,11,5,3 , but 3,3,7 is not a subsequence of
6... | 0 | 2016-09-14T20:37:37Z | 39,532,670 | <p>This solves your problem without using any recursion :) </p>
<pre><code>n = int(input())
ar = []
bestvals = []
best_stored = []
for x in range(n):
ar.append(int(input()))
best_stored.append(0)
best_stored[0] = 1
for i in range(n):
maxval = 1
for j in range(i):
if ar[i] % ar[j] == 0:
maxval = max... | 0 | 2016-09-16T13:26:02Z | [
"python",
"algorithm"
] |
Is it good to change the Python antigravity library | 39,499,348 | <p>I came across Python's antigravity library recently and got information about it from <a href="http://python-history.blogspot.com/2010/06/import-antigravity.html" rel="nofollow">this</a> post. I then tried <code>import antigravity</code> in the interpreter: it opened the URL of the xkcd comic as expected but did not... | 0 | 2016-09-14T20:42:31Z | 39,499,535 | <p>Report it to the Python issue tracker. Its purpose is to get questions like "will there be problems with backward compatibility" into the view of the people best capable of making that determination. Even if they reject the change, the issue will be documented, in case a later review reverses that decision.</p>
| 3 | 2016-09-14T20:57:46Z | [
"python"
] |
How to connect a QPushButton to a function | 39,499,349 | <p>I want to create a simple program with a PyQt GUI. For this I used Qt Designer, and I made a window with a push-button named <code>OpenImage</code>. Moreover, I have a file named <em>rony.py</em> that has a function <code>show</code>. So I want that when the user clicks the button, the image will appear.</p>
<p>Thi... | 0 | 2016-09-14T20:42:42Z | 39,499,989 | <p>You have to reference the name of your script when calling a function from it. It works as a library:</p>
<pre><code>OpenImage.connect(rony.show())
</code></pre>
| 0 | 2016-09-14T21:35:41Z | [
"python",
"pyqt",
"signals-slots",
"qpushbutton"
] |
PyCharm import MySQL | 39,499,387 | <p>I am trying </p>
<pre><code>import MySQLdb as mdb
</code></pre>
<p>on PyCharm and get the error:</p>
<pre><code>ImportError: No module named MySQLdb
</code></pre>
<p>From the PyCharm-preference, cannot find MySQLdb to import.
pymysql was successfully installed on PyCharm though.
Suggestions ? Thank you very muc... | 0 | 2016-09-14T20:46:15Z | 39,499,681 | <p>You can use <code>pymysql</code> installing through PyCharm instead of MySQLdb. It's a drop-in replacement for it.</p>
<p><strong>Documentation:</strong> <a href="https://github.com/PyMySQL/PyMySQL" rel="nofollow">https://github.com/PyMySQL/PyMySQL</a></p>
| 2 | 2016-09-14T21:09:40Z | [
"python",
"mysql",
"python-2.7",
"pycharm",
"mysql-python"
] |
How can I find dict keys for matching values in two dicts? | 39,499,409 | <p>I have two dictionaries mapping IDs to values. For simplicity, lets say those are the dictionaries:</p>
<pre><code>d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
</code></pre>
<p>As named, the dictionaries are not symmetrical.
I would like to get a dictionary of <em>keys</e... | 1 | 2016-09-14T20:47:55Z | 39,499,478 | <pre><code>from collections import defaultdict
from pprint import pprint
d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
d_result = defaultdict(list)
{d_result[a].append(b) for a in d_source for b in d_target if d_source[a] == d_target[b]}
pprint(d_result)
</code></pre>
<p><... | 1 | 2016-09-14T20:53:19Z | [
"python",
"dictionary",
"optimization"
] |
How can I find dict keys for matching values in two dicts? | 39,499,409 | <p>I have two dictionaries mapping IDs to values. For simplicity, lets say those are the dictionaries:</p>
<pre><code>d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
</code></pre>
<p>As named, the dictionaries are not symmetrical.
I would like to get a dictionary of <em>keys</e... | 1 | 2016-09-14T20:47:55Z | 39,499,490 | <p>It is up to you to determine the <em>best</em> solution. Here is <em>a</em> solution:</p>
<pre><code>def dicts_to_tuples(*dicts):
result = {}
for d in dicts:
for k,v in d.items():
result.setdefault(v, []).append(k)
return [tuple(v) for v in result.values() if len(v) > 1]
d1 = {'a... | 0 | 2016-09-14T20:54:09Z | [
"python",
"dictionary",
"optimization"
] |
How can I find dict keys for matching values in two dicts? | 39,499,409 | <p>I have two dictionaries mapping IDs to values. For simplicity, lets say those are the dictionaries:</p>
<pre><code>d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
</code></pre>
<p>As named, the dictionaries are not symmetrical.
I would like to get a dictionary of <em>keys</e... | 1 | 2016-09-14T20:47:55Z | 39,499,499 | <p>Here is another solution. There are a lot of ways to do this</p>
<pre><code>for key1 in d1:
for key2 in d2:
if d1[key1] == d2[key2]:
stuff
</code></pre>
<p>Note that you can use any name for key1 and key2.</p>
| 1 | 2016-09-14T20:55:02Z | [
"python",
"dictionary",
"optimization"
] |
How can I find dict keys for matching values in two dicts? | 39,499,409 | <p>I have two dictionaries mapping IDs to values. For simplicity, lets say those are the dictionaries:</p>
<pre><code>d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
</code></pre>
<p>As named, the dictionaries are not symmetrical.
I would like to get a dictionary of <em>keys</e... | 1 | 2016-09-14T20:47:55Z | 39,499,834 | <p>All answers have <code>O(n^2)</code> efficiency which isn't very good so I thought of answering myself.</p>
<p>I use <code>2(source_len) + 2(dict_count)(dict_len)</code> memory and I have <code>O(2n)</code> efficiency which is the best you can get here I believe.</p>
<p>Here you go:</p>
<pre><code>from collection... | 2 | 2016-09-14T21:22:34Z | [
"python",
"dictionary",
"optimization"
] |
How can I find dict keys for matching values in two dicts? | 39,499,409 | <p>I have two dictionaries mapping IDs to values. For simplicity, lets say those are the dictionaries:</p>
<pre><code>d_source = {'a': 1, 'b': 2, 'c': 3, '3': 3}
d_target = {'A': 1, 'B': 2, 'C': 3, '1': 1}
</code></pre>
<p>As named, the dictionaries are not symmetrical.
I would like to get a dictionary of <em>keys</e... | 1 | 2016-09-14T20:47:55Z | 39,500,376 | <p>This maybe "cheating" in some regards, although if you are looking for the matching values of the keys regardless of the case sensitivity then you might be able to do:</p>
<pre><code>import sets
aa = {'a': 1, 'b': 2, 'c':3}
bb = {'A': 1, 'B': 2, 'd': 3}
bbl = {k.lower():v for k,v in bb.items()}
result = {k:k.upp... | 1 | 2016-09-14T22:06:31Z | [
"python",
"dictionary",
"optimization"
] |
Package only binary compiled .so files of a python library compiled with Cython | 39,499,453 | <p>I have a package named <code>mypack</code> which inside has a module <code>mymod.py</code>, and
the <code>__init__.py</code>.
For some reason that is not in debate, I need to package this module compiled
(nor .py or .pyc files are allowed). That is, the <code>__init__.py</code> is the only
source file allowed in t... | 2 | 2016-09-14T20:51:12Z | 39,640,762 | <p>This was exactly the sort of problem <a href="http://lucumr.pocoo.org/2014/1/27/python-on-wheels/" rel="nofollow"><strong>the Python wheels format</strong></a> â <a href="https://www.python.org/dev/peps/pep-0427/" rel="nofollow">described in PEP 427</a> â was developed to address.</p>
<p>Wheels are a replacemen... | 1 | 2016-09-22T13:41:44Z | [
"python",
"cython",
"setuptools",
"distutils",
"setup.py"
] |
Tkinter Threading causing UI freeze | 39,499,468 | <p>I've searched this site (and others) up and down but I can't seem to find the right solution.</p>
<p>I have a client program that connects to a server and automatically sends a message every few seconds, as well as on user command. I'm using multiple threads for this.
Enter Tkinter: Once I hit the 'Connect' button... | 0 | 2016-09-14T20:52:20Z | 39,501,945 | <p>You pass the result of <code>eventsim.con_thread(IP,Port)</code> to <code>Thread(...)</code> function, so it will wait until the execution of <code>eventsim.con_thread(...)</code> completes. Try changing:</p>
<pre><code>def connect(self, IP, Port):
ConnectionThread = Thread(eventsim.con_thread(IP,Port))
Co... | 1 | 2016-09-15T01:32:01Z | [
"python",
"multithreading",
"tkinter"
] |
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