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 |
|---|---|---|---|---|---|---|---|---|---|
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,336,875 | <p>maybe oneliner : </p>
<pre><code>s = map(lambda x : x*(x+1),list(range(1,20)))
</code></pre>
<p>basically <strong>map</strong> is core function used to make same operation on every element of table. first parameter is function which will be applied to every element. And If You want to remember generate another val... | 0 | 2016-09-05T19:51:25Z | [
"python"
] |
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,336,962 | <p>Ok, I am not quite sure if I understand your question correctly, since you talk about modulus 11, but also seem to use numbers from 2 up to and including 9.</p>
<p>But let's first start with writing the 1..20 as a list, that would be possible as follows:</p>
<pre><code>list(range(1,21)) (This is if you want to ... | 1 | 2016-09-05T19:58:33Z | [
"python"
] |
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,336,991 | <p>You don't have to worry about resetting the multiplier if you use <a href="https://docs.python.org/2/library/itertools.html#itertools.cycle" rel="nofollow"><code>itertools.cycle</code></a>:</p>
<pre><code>>>> itertools.cycle(range(2, 10))
2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5, ...
</code></pre>
<p>so you can... | 1 | 2016-09-05T20:00:32Z | [
"python"
] |
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,337,007 | <p>You can use the current index to determine the multiplier:</p>
<pre><code>>>> [(index % 8 + 2) * item for index, item in enumerate(range(1, 21))]
[2, 6, 12, 20, 30, 42, 56, 72, 18, 30, 44, 60, 78, 98, 120, 144, 34, 54, 76, 100]
#^ resets ^ resets ^
</code></pre... | 2 | 2016-09-05T20:01:38Z | [
"python"
] |
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,337,134 | <p>A lot of good answers here already, and in case you would like to use <code>numpy</code> (usually good for this sort of thing), here's an alternative:</p>
<pre><code>In [1]: import numpy as np
In [2]: a = np.arange(1, 21) # like range in numpy array
In [3]: a - 1 #Â calculation performs per element wise... so w... | 1 | 2016-09-05T20:13:31Z | [
"python"
] |
Multiply number list by range of numbers | 39,336,824 | <p>I'm trying to write code for a modulus 11 but I'm failing to make it more python-like.</p>
<p>As of now I'm using a weight and increasing it, checking when it reaches a number and then set it to it's original value.</p>
<p>Let's say I have a list of numbers
<code>1..20</code> and I'd like to multiply them by <code... | 4 | 2016-09-05T19:46:51Z | 39,337,222 | <p>You can use <a href="https://docs.python.org/2/library/itertools.html#itertools.starmap" rel="nofollow">starmap</a> and <a href="https://docs.python.org/2/library/itertools.html#itertools.cycle" rel="nofollow">cycle</a> from itertools.</p>
<p>First create a list of tuples to multiply together:</p>
<pre><code>>&... | 1 | 2016-09-05T20:20:41Z | [
"python"
] |
how to serve local static files in development when hosted in S3 | 39,336,973 | <p>I'm storing my static files in S3 according to this tutorial: <a href="https://www.caktusgroup.com/blog/2014/11/10/Using-Amazon-S3-to-store-your-Django-sites-static-and-media-files/" rel="nofollow">https://www.caktusgroup.com/blog/2014/11/10/Using-Amazon-S3-to-store-your-Django-sites-static-and-media-files/</a></p>... | 0 | 2016-09-05T19:59:18Z | 39,337,686 | <p>I set the following in my local_settings.py:</p>
<pre><code>STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage'
</code></pre>
<p>Then it looks for all static assets at localhost.</p>
| 0 | 2016-09-05T21:03:53Z | [
"javascript",
"python",
"django",
"amazon-s3",
"django-staticfiles"
] |
Getting queue where task came from | 39,336,983 | <p>I have a Celery application with 2 queues in which tasks of a given class (say, MyTask) are consumed round-robin. Some instances of MyTask are routed to the first queue, while other instances go to the second one.</p>
<p>Sometimes, a task needs to instantiate another object of MyTask and invoke <code>apply_async</c... | 1 | 2016-09-05T20:00:01Z | 39,355,161 | <p>See <code>delivery_info</code> on <a href="http://docs.celeryproject.org/en/latest/userguide/tasks.html#context" rel="nofollow">Task context</a>.</p>
| 1 | 2016-09-06T17:59:58Z | [
"python",
"celery"
] |
How to get the title of links in the html page using BeautifulSoup python? | 39,336,994 | <p>Consider the html :</p>
<pre><code><li><img alt="SangamUniversity-animated" class="newimg" src="images/new_animated.gif" /><a href="pdffiles/Special Exam_Aug_2016.pdf" target="_blank"> Student Notice </a></li>
<li><img alt="SangamUniversity-animated" class="newimg" src="images... | -1 | 2016-09-05T20:00:45Z | 39,337,147 | <p>Which python and BeautifulSoup do you use?
In case of python2x and BS v. 3:</p>
<pre><code>from BeautifulSoup import BeautifulSoup
text = """<li><img alt="SangamUniversity-animated" class="newimg" src="images/new_animated.gif" /><a href="pdffiles/Special Exam_Aug_2016.pdf" target="_blank"> Studen... | 0 | 2016-09-05T20:14:33Z | [
"python",
"web-scraping",
"beautifulsoup",
"urllib2"
] |
How to get the title of links in the html page using BeautifulSoup python? | 39,336,994 | <p>Consider the html :</p>
<pre><code><li><img alt="SangamUniversity-animated" class="newimg" src="images/new_animated.gif" /><a href="pdffiles/Special Exam_Aug_2016.pdf" target="_blank"> Student Notice </a></li>
<li><img alt="SangamUniversity-animated" class="newimg" src="images... | -1 | 2016-09-05T20:00:45Z | 39,337,174 | <p>You don't need <code>urllib</code> if you already have the html...urllib is used to make a request to a web server which then returns the html, you can simply do this when you have the html</p>
<pre><code>>>> from bs4 import BeautifulSoup
>>> a = """<li><img alt="SangamUniversity-animated... | 0 | 2016-09-05T20:17:13Z | [
"python",
"web-scraping",
"beautifulsoup",
"urllib2"
] |
ElementTree Remove Element | 39,337,042 | <p>Python noob here. Wondering what's the cleanest and best way to <strong>remove</strong> all the "<code>profile</code>" tags with <code>updated</code> attribute value of <code>true</code>. </p>
<p>I have tried the following code but it's throwing: <strong>SyntaxError("cannot use absolute path on element")</strong></... | 1 | 2016-09-05T20:05:27Z | 39,337,426 | <p>If you are using <code>xml.etree.ElementTree</code>, you should use <a href="https://docs.python.org/2/library/xml.etree.elementtree.html#xml.etree.ElementTree.Element.remove" rel="nofollow"><code>remove()</code></a> method to remove a node, but this requires you to have the parent node reference. Hence, the solutio... | 0 | 2016-09-05T20:39:16Z | [
"python",
"xml",
"python-2.7",
"scripting",
"elementtree"
] |
Adding Acces-Control-Allow-Origin to app.yml | 39,337,067 | <p>I'm following these instructions from Google App Engine docs :</p>
<p><a href="https://cloud.google.com/appengine/docs/python/config/appref" rel="nofollow">https://cloud.google.com/appengine/docs/python/config/appref</a></p>
<p>If you search for CORS, you'll see the example I am trying to copy. </p>
<p>My app.yam... | 1 | 2016-09-05T20:07:04Z | 39,337,637 | <p>Unfortunately that's not valid <a href="http://yaml.org/" rel="nofollow">yaml</a>.</p>
<p>You have an indentation problem. Also you have to quote the <code>*</code>. Should be:</p>
<pre><code>handlers:
- url: /.*
script: main.app
http_headers:
Access-Control-Allow-Origin: "*"
</code></pre>
| 4 | 2016-09-05T20:59:23Z | [
"python",
"google-app-engine",
"cors"
] |
Quickly filter elements in Python array by minimum and maximum values | 39,337,082 | <p>I have a somewhat large <code>numpy</code> array of floats (<code>large_array</code>, ~2e7 elements). I need to generate a new array, filtering out all elements beyond certain minimum and maximum values.</p>
<p>I can do this with a simple:</p>
<pre><code>import numpy as np
large_array = np.random.uniform(0., 10000... | 3 | 2016-09-05T20:08:26Z | 39,337,132 | <p>try this:</p>
<pre><code>In [18]: large_array.shape
Out[18]: (20000000,)
In [26]: new = large_array[(large_array >= min_val) & (large_array <= max_val)]
In [27]: new
Out[27]: array([ 814.24315891, 1611.53346093, 624.31833231, ..., 1999.08383068, 2212.9825087 , 1786.08963269])
In [28]: new.shape
... | 1 | 2016-09-05T20:13:13Z | [
"python",
"arrays",
"numpy"
] |
Convert a string to JSON | 39,337,100 | <p>I would like to convert this string to a JSON dict:</p>
<pre><code>{u'Processes': [[u'root', u'3606', u'0.0', u'0.2', u'76768', u'16664', u'?', u'Ss', u'20:40', u'0:01', u'/usr/local/bin/python2 /usr/local/bin/gunicorn app:app -b 0.0.0.0:80 --log-file - --access-logfile - --workers 4 --keep-alive 0'], [u'root', u'4... | 2 | 2016-09-05T20:09:55Z | 39,337,138 | <p>Use <a href="https://docs.python.org/3.5/library/ast.html#ast.literal_eval" rel="nofollow"><code>ast.literal_eval</code></a> to convert string to valid Python object.</p>
<blockquote>
<p>Safely evaluate an expression node or a string containing a Python
literal or container display. The string or node provided ... | 2 | 2016-09-05T20:14:09Z | [
"python",
"json"
] |
Convert a string to JSON | 39,337,100 | <p>I would like to convert this string to a JSON dict:</p>
<pre><code>{u'Processes': [[u'root', u'3606', u'0.0', u'0.2', u'76768', u'16664', u'?', u'Ss', u'20:40', u'0:01', u'/usr/local/bin/python2 /usr/local/bin/gunicorn app:app -b 0.0.0.0:80 --log-file - --access-logfile - --workers 4 --keep-alive 0'], [u'root', u'4... | 2 | 2016-09-05T20:09:55Z | 39,337,257 | <p>Try this,</p>
<pre><code>import json
data = {u'Processes': [[u'root', u'3606', u'0.0', u'0.2', u'76768', u'16664', u'?', u'Ss', u'20:40', u'0:01', u'/usr/local/bin/python2 /usr/local/bin/gunicorn app:app -b 0.0.0.0:80 --log-file - --access-logfile - --workers 4 --keep-alive 0'], [u'root', u'4088', u'0.0', u'0.2', u... | 0 | 2016-09-05T20:24:52Z | [
"python",
"json"
] |
Testing if a pandas DataFrame exists | 39,337,115 | <p>In my code, I have several variables which can either contain a pandas DataFrame or nothing at all. Let's say I want to test and see if a certain DataFrame has been created yet or not. My first thought would be to test for it like this:</p>
<pre><code>if df1:
# do something
</code></pre>
<p>However, that cod... | 3 | 2016-09-05T20:11:45Z | 39,337,192 | <blockquote>
<p>In my code, I have several variables which can either contain a pandas DataFrame or nothing at all</p>
</blockquote>
<p>They Pythonic way of indicating "nothing" is via <code>None</code>, and for checking "not nothing" via</p>
<pre><code>if df1 is not None:
...
</code></pre>
<p>I am not sure ho... | 3 | 2016-09-05T20:18:03Z | [
"python",
"pandas"
] |
Testing if a pandas DataFrame exists | 39,337,115 | <p>In my code, I have several variables which can either contain a pandas DataFrame or nothing at all. Let's say I want to test and see if a certain DataFrame has been created yet or not. My first thought would be to test for it like this:</p>
<pre><code>if df1:
# do something
</code></pre>
<p>However, that cod... | 3 | 2016-09-05T20:11:45Z | 39,338,381 | <p><strong><em>Option 1</em></strong> (my preferred option)</p>
<h3>This is @Ami Tavory's</h3>
<p><strong><em>Please select his answer if you like this approach</em></strong></p>
<p>It is very idiomatic python to initialize a variable with <code>None</code> then check for <code>None</code> prior to doing something w... | 3 | 2016-09-05T22:30:55Z | [
"python",
"pandas"
] |
How do i get each byte into a list | 39,337,208 | <p>I want to open a MIDI file and analyse each byte. But i am VERY unfamiliar with handeling bytes and bits. Midi's are written in hexadecimal if that does any difference.</p>
<p>What i want to do is put each byte into a list, and then make a for loop to check each one. How would i go about doing that?</p>
<p>I've co... | 1 | 2016-09-05T20:19:23Z | 39,337,451 | <p>just completed your code to scan the first 40 bytes of data. It prints the decimal value as well as the hex value using both C-like <code>%</code> formatting and more pythonic <code>format</code> method, which may be more understandable if format specification is in hex.</p>
<p>midi file has been downloaded <a href... | 1 | 2016-09-05T20:41:10Z | [
"python",
"list",
"python-3.x",
"byte",
"midi"
] |
How to access values of list inside list- Python | 39,337,263 | <p>I'm trying to make a game using pygame but I'm having problems with lists inside other lists.</p>
<p>inside the class of Enemy/Enemy 2 i have the following code:</p>
<pre><code>ei = [[Enemy(), Enemy()][Enemy2()]]
for wave in ei:
if self in wave:
print(ei.index(self))
</code></pre>
<p>The object is in... | 0 | 2016-09-05T20:25:21Z | 39,337,480 | <p>I tried to codify your question:</p>
<pre><code>ei = [[Enemy(), Enemy()][Enemy2()]]
for wave in ei:
if self In wave:
print(ei.index(self))
</code></pre>
<p>What do you mean by <code>[[Enemy(), Enemy()][Enemy2()]]</code>?
You are trying to get the <code>Enemy2()</code>th element of <code>[Enemy(), Enemy... | 0 | 2016-09-05T20:44:19Z | [
"python",
"list",
"nested-lists"
] |
How to access values of list inside list- Python | 39,337,263 | <p>I'm trying to make a game using pygame but I'm having problems with lists inside other lists.</p>
<p>inside the class of Enemy/Enemy 2 i have the following code:</p>
<pre><code>ei = [[Enemy(), Enemy()][Enemy2()]]
for wave in ei:
if self in wave:
print(ei.index(self))
</code></pre>
<p>The object is in... | 0 | 2016-09-05T20:25:21Z | 39,344,148 | <p>I am guessing, and there are several problems in your example. But maaaybe you want this:</p>
<pre><code>for index, wave in enumerate(ei):
if self in wave:
print(index)
</code></pre>
<p>See my comments or elaborate your question --as already recommended by other users, provide a MCVE and fix/explain th... | 0 | 2016-09-06T08:28:22Z | [
"python",
"list",
"nested-lists"
] |
Python 3.5.1 Formatting Floats Issue | 39,337,275 | <p>I am trying to create a app that compares loans with various interest rates for a programming assignment. I generally understand what I am doing and could complete the assignment but am running into an issue with the .format function. I'm trying to format floats so that they can be printed as results. Here is my cod... | 1 | 2016-09-05T20:26:10Z | 39,337,333 | <p>You can omit the numbering (and it'll be auto-numbered for you), but you still need to use the <code>:</code> colon to separate the identifier from the formatting specification:</p>
<pre><code>print("{:<20.6f}{:<20.6f}{:<20.6f}".format(interest_rate, monthly_payment, total_payment))
</code></pre>
<p>Witho... | 3 | 2016-09-05T20:31:46Z | [
"python",
"floating-point",
"python-3.5"
] |
tkinter won't update entry box with function | 39,337,348 | <p>Lately I've bean learning how to use the tkinter module in Python 3 to create a GUI. Unfortunately I've become stuck on an issue where my Entry widgets won't update. To understand the problem I wrote a short test case that populates an Entry widget with the string 'hello'.</p>
<pre><code>class SettingsWindow():
... | 1 | 2016-09-05T20:33:01Z | 39,337,468 | <p>The ttk widgets are particularly sensitive to the garbage collector. Make <code>start_time</code> an instance variable rather than a local variable.</p>
| 0 | 2016-09-05T20:42:58Z | [
"python",
"python-3.x",
"user-interface",
"tkinter"
] |
Python implementation of Mergesort for Linked list doesn't work | 39,337,414 | <p>I couldn't find a simple implementation of <code>Merge Sort</code> in Python for <code>Linked Lists</code> anywhere. Here's what I tried:</p>
<h3>Definition for singly-linked list:</h3>
<pre><code>class ListNode:
def __init__(self, x):
self.val = x
self.next = None
</code></pre>
<h3>Merge Sor... | 2 | 2016-09-05T20:38:17Z | 39,338,528 | <p>Try changing the lines in the mergeSort function to:</p>
<pre><code>leftHalf = mergeSortLinkedList(leftHalf)
rightHalf = mergeSortLinkedList(rightHalf)
</code></pre>
| 2 | 2016-09-05T22:51:04Z | [
"python",
"algorithm",
"sorting",
"linked-list",
"mergesort"
] |
Python implementation of Mergesort for Linked list doesn't work | 39,337,414 | <p>I couldn't find a simple implementation of <code>Merge Sort</code> in Python for <code>Linked Lists</code> anywhere. Here's what I tried:</p>
<h3>Definition for singly-linked list:</h3>
<pre><code>class ListNode:
def __init__(self, x):
self.val = x
self.next = None
</code></pre>
<h3>Merge Sor... | 2 | 2016-09-05T20:38:17Z | 39,339,667 | <p>You don't use the return values from the recursive call. The code should be:</p>
<pre><code>def mergeSortLinkedList(A):
if A is None or A.next is None:
return A
leftHalf, rightHalf = splitTheList(A)
left = mergeSortLinkedList(leftHalf)
right = mergeSortLinkedList(rightHalf)
return mer... | 1 | 2016-09-06T02:09:54Z | [
"python",
"algorithm",
"sorting",
"linked-list",
"mergesort"
] |
imports python3 in another folder | 39,337,460 | <p>When I run launch.py it fails and when I run main.py directly it works.
launch.py just imports and runs main.py. Why?</p>
<pre><code>âââ dir
â  âââ bla.py
â  âââ __init__.py
â  âââ main.py
âââ __init__.py
âââ launch.py
launch.py
---------
#!/usr/bin/env python... | 1 | 2016-09-05T20:41:58Z | 39,337,533 | <p>I believe I see the answer...
<br>
You have not defined main, perhaps try that. The reason why it works when called directly is because Python scripts are run in the order in which functions appear unless a specific function is called.</p>
<p>Try changing main.py to</p>
<pre><code>import bla
def mainfunction():
... | -1 | 2016-09-05T20:47:34Z | [
"python",
"import",
"module",
"folder"
] |
imports python3 in another folder | 39,337,460 | <p>When I run launch.py it fails and when I run main.py directly it works.
launch.py just imports and runs main.py. Why?</p>
<pre><code>âââ dir
â  âââ bla.py
â  âââ __init__.py
â  âââ main.py
âââ __init__.py
âââ launch.py
launch.py
---------
#!/usr/bin/env python... | 1 | 2016-09-05T20:41:58Z | 39,338,088 | <p>Using your layout and with the following files, we don't have problems.</p>
<h3>launch.py</h3>
<pre><code>#!/usr/bin/env python
# -*- coding: utf-8 -*-
from dir import main
if __name__ == "__main__":
main. main()
</code></pre>
<h3>main.py</h3>
<pre><code>#!/usr/bin/env python
# -*- coding: utf-8 -*-
try:
... | 1 | 2016-09-05T21:50:32Z | [
"python",
"import",
"module",
"folder"
] |
Using ROS message classes outside of ROS | 39,337,522 | <p>I have a ROS node written in Python that captures messages and writes them to disk (e.g. using <code>pickle</code>). I want to use these files later, in another Python script, outside of ROS, but I need to import the message classes.</p>
<p>Is that possible?</p>
<p>Thanks!</p>
| 1 | 2016-09-05T20:46:54Z | 39,611,619 | <p>Unfortunately I don't think it's possible to just import the message files outside of any ROS dependencies. For example, if you look inside one of the generated message class files:</p>
<pre><code>---/your_catkin_ws/devel/lib/python2.7/dist-packages/your_package/msg/_Message.py
</code></pre>
<p>You will see that i... | 1 | 2016-09-21T08:45:06Z | [
"python",
"ros"
] |
How to get 2 or more LinearRegionItem to overlap each other | 39,337,545 | <p>I have added 2 <code>LinearRegionItems</code> to a <code>pyqtgraph</code> plot. When I move the boundary of 1 over the other, the boundary never overlaps the other.</p>
<p>I would like to know how to allow overlapping. This is a functionality that I need, where I am selecting different regions of the data plot to b... | 1 | 2016-09-05T20:48:26Z | 39,413,892 | <p>Sorry, there was a bug in my code which was handling the case where a part of one LinearRegionItem overlapped with another LinearRegionItem.</p>
<p>Now I see that one linearRegionItem can lie on top of another one.</p>
<p>Consider this solved</p>
| 0 | 2016-09-09T14:26:10Z | [
"python",
"pyqtgraph"
] |
How to implement simple Monte Carlo function in pymc | 39,337,589 | <p>I'm trying to get my head around how to implement a Monte Carlo function in python using pymc to replicate a spreadsheet by Douglas Hubbard in his book <a href="http://www.howtomeasureanything.com/wp-content/uploads/2015/03/HTMA_3rd_Ch6.xlsx" rel="nofollow">How to Measure Anything</a></p>
<p>My attempt was:</p>
<p... | 1 | 2016-09-05T20:53:07Z | 39,347,046 | <p>Ah, it was a copy and paste error. </p>
<p>I'd called three distributions by the same name.</p>
<p>Here's the code that works.</p>
<pre><code>import numpy as np
import pandas as pd
from pymc import DiscreteUniform, Exponential, deterministic, Poisson, Uniform, Normal, Stochastic, MCMC, Model
%matplotlib inline
im... | 0 | 2016-09-06T10:42:10Z | [
"python",
"pymc"
] |
Python Error in Displaying Image | 39,337,619 | <p>On this Image</p>
<p><a href="http://i.stack.imgur.com/GLcQa.jpg" rel="nofollow"><img src="http://i.stack.imgur.com/GLcQa.jpg" alt="enter image description here"></a></p>
<p>I am trying to apply:</p>
<pre><code>from PIL import Image
img0 = PIL.Image.open('Entertainment.jpg')
img0 = np.float32(img0)
showarray(img0... | 1 | 2016-09-05T20:56:56Z | 39,337,768 | <p><code>Image</code> is a module that you imported </p>
<pre><code>from PIL import Image
</code></pre>
<p>You can't call it </p>
<pre><code>Image(data=f.getvalue())
</code></pre>
<p>There's a show method that may be useful </p>
<pre><code>img0 = PIL.Image.open('Entertainment.jpg')
img0.show()
</code></pre>
| 0 | 2016-09-05T21:14:40Z | [
"python",
"image",
"python-imaging-library"
] |
embedding resources in python scripts | 39,337,630 | <p>I'd like to figure out how to embed binary content in a python script. For instance, I don't want to have any external files around (images, sound, ... ), I want all this content living inside of my python scripts.</p>
<p>Little example to clarify, let's say I got this small snippet:</p>
<pre><code>from StringIO i... | 1 | 2016-09-05T20:58:45Z | 39,337,715 | <p>The best way to go about this is converting your picture into a python string, and have it in a separate file called something like <code>resources.py</code>, then you simply parse it.</p>
<p>If you are looking to embed the whole thing inside a single binary, then you're looking at something like <a href="http://py... | 3 | 2016-09-05T21:08:16Z | [
"python",
"embedded-resource"
] |
embedding resources in python scripts | 39,337,630 | <p>I'd like to figure out how to embed binary content in a python script. For instance, I don't want to have any external files around (images, sound, ... ), I want all this content living inside of my python scripts.</p>
<p>Little example to clarify, let's say I got this small snippet:</p>
<pre><code>from StringIO i... | 1 | 2016-09-05T20:58:45Z | 39,350,365 | <p>You might find the following class rather useful for embedding resources in your program. To use it, call the <code>package</code> method with paths to the files that you want to embed. The class will print out a <code>DATA</code> attribute that should be used to replace the one already found in the class. If you wa... | 1 | 2016-09-06T13:34:10Z | [
"python",
"embedded-resource"
] |
Sorting function in Pandas, returns messy data | 39,337,648 | <p>I am trying to sort data in a CSV file using sort function in Pandas using the following code. I have 229 rows in original file. But the output of sorting is 245 rows, because some of the data in a field were printed in the next row and some of the rows do not have any value. </p>
<pre><code>sample=pd.read_csv("s... | 4 | 2016-09-05T21:00:44Z | 39,338,666 | <p>You could try to remove the newlines in your problem column.</p>
<pre><code>sample=pd.read_csv("sample.csv" , encoding='latin-1', skipinitialspace=True)
sample["problem_column"] = (sample["problem_column"].
apply(lambda x: " ".join([word for word in x.split()])
... | 2 | 2016-09-05T23:12:49Z | [
"python",
"sorting",
"pandas"
] |
C function to Python (different results) | 39,337,652 | <p>I am trying to port this snippet of code to python from C. The outputs are different even though it's the same code.</p>
<p>This is the C version of the code which works:</p>
<pre><code>int main(void)
{
uint8_t pac[] = {0x033,0x55,0x22,0x65,0x76};
uint8_t len = 5;
uint8_t chan = 0x64;
btLeWhiten(pac, len, chan);... | 3 | 2016-09-05T21:01:11Z | 39,337,731 | <p>In C you are writing data from 0 to len-1 but in Python you are writing data from -1 to len-2. Remove the -1 from this line:</p>
<pre><code>data[len - idx -1 ] ^= m
</code></pre>
<p>like this</p>
<pre><code>data[len - idx] ^= m
</code></pre>
<p>you also need to put this line outside the if:</p>
<pre><code>white... | 1 | 2016-09-05T21:10:19Z | [
"python",
"bit-manipulation",
"lfsr"
] |
C function to Python (different results) | 39,337,652 | <p>I am trying to port this snippet of code to python from C. The outputs are different even though it's the same code.</p>
<p>This is the C version of the code which works:</p>
<pre><code>int main(void)
{
uint8_t pac[] = {0x033,0x55,0x22,0x65,0x76};
uint8_t len = 5;
uint8_t chan = 0x64;
btLeWhiten(pac, len, chan);... | 3 | 2016-09-05T21:01:11Z | 39,337,750 | <p><code>whitenCoeff <<= 1</code> in C becomes 0 after a while because it is a 8-bit data.</p>
<p>In python, there's no such limit, so you have to write:</p>
<pre><code>whitenCoeff = (whitenCoeff<<1) & 0xFF
</code></pre>
<p>to mask higher bits out.</p>
<p>(don't forget to check vz0 remark on array b... | 1 | 2016-09-05T21:12:31Z | [
"python",
"bit-manipulation",
"lfsr"
] |
C function to Python (different results) | 39,337,652 | <p>I am trying to port this snippet of code to python from C. The outputs are different even though it's the same code.</p>
<p>This is the C version of the code which works:</p>
<pre><code>int main(void)
{
uint8_t pac[] = {0x033,0x55,0x22,0x65,0x76};
uint8_t len = 5;
uint8_t chan = 0x64;
btLeWhiten(pac, len, chan);... | 3 | 2016-09-05T21:01:11Z | 39,337,824 | <p>You've got a few more problems.</p>
<ol>
<li><code>whitenCoeff <<= 1;</code> is outside of the <code>if</code> block in your C code, but it's inside of the <code>if</code> block in your Python code.</li>
<li><code>data[len - idx -1 ] ^= m</code> wasn't translated correctly, it works backwards from the C code.... | 1 | 2016-09-05T21:20:42Z | [
"python",
"bit-manipulation",
"lfsr"
] |
C function to Python (different results) | 39,337,652 | <p>I am trying to port this snippet of code to python from C. The outputs are different even though it's the same code.</p>
<p>This is the C version of the code which works:</p>
<pre><code>int main(void)
{
uint8_t pac[] = {0x033,0x55,0x22,0x65,0x76};
uint8_t len = 5;
uint8_t chan = 0x64;
btLeWhiten(pac, len, chan);... | 3 | 2016-09-05T21:01:11Z | 39,370,028 | <p>I solved it by anding the python code with 0xFF. That keeps the variable from increasing beyond 8 bits.</p>
| 0 | 2016-09-07T12:30:52Z | [
"python",
"bit-manipulation",
"lfsr"
] |
Tensorflow slim train and validate inception model | 39,337,691 | <p>I'm trying to fine tune inception models, and validate it with test data. But all the examples given at tensorflow slime web page only either fine-tuning or testing, there is not any example that doing both at same graph and session. </p>
<p>Basically I want to this. </p>
<pre><code>with tf.Graph().as_default():
... | 0 | 2016-09-05T21:04:18Z | 39,358,463 | <p>Does calling train with number_of_steps=10 and then using the evaluation code work?</p>
| -1 | 2016-09-06T21:58:45Z | [
"python",
"neural-network",
"tensorflow",
"deep-learning",
"conv-neural-network"
] |
What is the default value that Python chooses when adding two variables? | 39,337,729 | <p>Suppose we have the following context: </p>
<pre><code>x = 3
y = 4
z = x + y
</code></pre>
<p>Will <code>z</code> be an <code>int</code> or <code>float</code>, etc? I am well aware that floating numbers do end with <code>.something</code>, however its unclear to me whether Python will favour the floating point... | 1 | 2016-09-05T21:10:12Z | 39,337,755 | <p>When <em>mixing</em> types, you'll always get the 'wider' type, where a complex number is wider than float, which in turn is wider than an integer. When both values are the same type (so <em>not</em> mixing types), you will just get that one type as the result.</p>
<p>From the <a href="https://docs.python.org/2/lib... | 3 | 2016-09-05T21:13:11Z | [
"python",
"python-3.x",
"types"
] |
What is the default value that Python chooses when adding two variables? | 39,337,729 | <p>Suppose we have the following context: </p>
<pre><code>x = 3
y = 4
z = x + y
</code></pre>
<p>Will <code>z</code> be an <code>int</code> or <code>float</code>, etc? I am well aware that floating numbers do end with <code>.something</code>, however its unclear to me whether Python will favour the floating point... | 1 | 2016-09-05T21:10:12Z | 39,337,860 | <p>For example:</p>
<pre><code>>>> type(3 + 4)
<class 'int'>
>>> type(3.0 + 4)
<class 'float'>
>>> type(3.0 + 4.0)
<class 'float'>
</code></pre>
<p>If the difference between a float or integer is important to your application, explicitly convert the user input into a float... | 1 | 2016-09-05T21:25:19Z | [
"python",
"python-3.x",
"types"
] |
What is the default value that Python chooses when adding two variables? | 39,337,729 | <p>Suppose we have the following context: </p>
<pre><code>x = 3
y = 4
z = x + y
</code></pre>
<p>Will <code>z</code> be an <code>int</code> or <code>float</code>, etc? I am well aware that floating numbers do end with <code>.something</code>, however its unclear to me whether Python will favour the floating point... | 1 | 2016-09-05T21:10:12Z | 39,338,116 | <p>The <em>mixing</em> rules Martijn described are a good way to think about built in numeric types. More broadly, any object can support arithmetic operators such as <code>+</code> and <code>*</code> as long as the methods are implemented. With objects <code>a</code> and <code>b</code> when you apply an arithmetic ope... | 0 | 2016-09-05T21:54:09Z | [
"python",
"python-3.x",
"types"
] |
What is the default value that Python chooses when adding two variables? | 39,337,729 | <p>Suppose we have the following context: </p>
<pre><code>x = 3
y = 4
z = x + y
</code></pre>
<p>Will <code>z</code> be an <code>int</code> or <code>float</code>, etc? I am well aware that floating numbers do end with <code>.something</code>, however its unclear to me whether Python will favour the floating point... | 1 | 2016-09-05T21:10:12Z | 39,338,265 | <p>This is easy to test. By default, if you perform arithmetic on two integers, Python will store the result as an integer. You can see that here.</p>
<pre><code>>>> x = 1
>>> y = 2
>>> z = x + y
>>> type(z)
<class 'int'>
</code></pre>
<p>The type function will tell you what ... | 1 | 2016-09-05T22:16:04Z | [
"python",
"python-3.x",
"types"
] |
Distance beetween lists in Python 3 | 39,337,736 | <p>Python 3.4</p>
<p>I have many lists, like that:</p>
<pre><code>A=[(1,2),(3,4),..]
...
N=[(10,2),(3,4),...]
</code></pre>
<p>I want to merge the lists, if exist minimum distance (between their points) < 10.</p>
<p>measure is <code>sqrt((x1-x2)^2+(y1-y2)^2)</code></p>
<p>For example we have list with 3 matrix:... | 0 | 2016-09-05T21:11:07Z | 39,337,944 | <p>I suggest you look at some form of <a href="https://en.wikipedia.org/wiki/Cluster_analysis" rel="nofollow">cluster analysis</a></p>
| 0 | 2016-09-05T21:34:42Z | [
"python",
"python-3.x"
] |
Why Python scope my variable outside my function? | 39,337,756 | <p>i start with Python. I like to try new language. So i've got a "simple" problem about scope and Python.</p>
<p>Here is a recursive function</p>
<pre><code>def foo(myarray)
if myarray == False:
myarray = [[0] * 5 for _ in range(5)]
myarray[0][0] = 1
"some code ..."
foo(myarray)
myarray = False
foo(m... | -6 | 2016-09-05T21:13:26Z | 39,337,818 | <p>Disregarding the myriad of syntax errors, your <code>myarray</code> variable seems to be declared globally and that's why it has global scope?</p>
| 2 | 2016-09-05T21:20:04Z | [
"python",
"python-3.x"
] |
Python UDF for Pig in Azure Data Factory On demand HDInsight cluster | 39,337,791 | <p>How to include python UDF for pig when using Azure data factory and azure blob to store the pig script?</p>
| 0 | 2016-09-05T21:16:47Z | 39,651,902 | <p>@abu,</p>
<p>I recommend you can refer to the official document to konw how to use Pig and Python On Azure HDinsight.
<a href="https://azure.microsoft.com/en-in/documentation/articles/hdinsight-python/" rel="nofollow">https://azure.microsoft.com/en-in/documentation/articles/hdinsight-python/</a>
If you store your p... | 0 | 2016-09-23T03:02:17Z | [
"python",
"azure",
"apache-pig",
"hdinsight",
"azure-data-factory"
] |
Rabbitmq one queue multiple consumers | 39,337,821 | <p>I've multiple consumers which are polling on the same queue, and checking the queue every X seconds, basically after X seconds it could be that at least two consumers can launch <code>basic.get</code> at the very same time. </p>
<p>Question are:<br>
1.If at least two consumers at the same time can get the same mes... | 1 | 2016-09-05T21:20:17Z | 39,340,382 | <blockquote>
<p>1.If at least two consumers at the same time can get the same message?</p>
</blockquote>
<p>no - a single message will only be delivered to a single consumer.</p>
<p>Because of that, your scenario #2 doesn't come into play at all. </p>
<p>You'll never have 2 consumers working on the same message, u... | 2 | 2016-09-06T03:51:29Z | [
"python",
"python-2.7",
"rabbitmq",
"pika"
] |
bytes casted to int by a list constructor | 39,337,840 | <p>I want to read <em>n</em> bytes a binary file and store each byte in a list. However, when I do so, each byte is casted into an <code>int</code>.</p>
<p>First I create a random file.</p>
<pre><code>$ head -c 16 > random.file
</code></pre>
<p>Then I try to read it:</p>
<pre class="lang-py prettyprint-override"... | 2 | 2016-09-05T21:22:46Z | 39,338,141 | <p>Any single byte you access in a list of bytes is just a single int value:</p>
<pre><code>>>> b"foo"[0]
102
</code></pre>
<p>If you want to create a new list that consists of lists of bytes with the length 1, you'll have to do that explicitly:</p>
<pre><code>>>> c = b"foo"
>>> l = []
>... | 1 | 2016-09-05T21:57:16Z | [
"python",
"types",
"casting"
] |
Python iterating from the middle of a cycle to before the start | 39,337,849 | <p>I've been working on programming a board game to practice python. I use a cycle to do turn order like this:</p>
<pre><code>turncycle = [0,1,2,3]
for turnindex in cycle(turncycle):
#.
#...turn stuff
#...turnindex is used for active player
#.
</code></pre>
<p>What I want to do is given a turn index s... | 0 | 2016-09-05T21:23:29Z | 39,337,913 | <p>What about something like this?</p>
<pre><code>def next_cycle(lst):
return turncycle[1:] + turncycle[:1]
turncycle = [0, 1, 2, 3]
for turnindex in range(len(turncycle)):
turncycle = next_cycle(turncycle)
print turncycle
</code></pre>
| 1 | 2016-09-05T21:31:22Z | [
"python",
"list",
"iteration",
"cycle"
] |
Python iterating from the middle of a cycle to before the start | 39,337,849 | <p>I've been working on programming a board game to practice python. I use a cycle to do turn order like this:</p>
<pre><code>turncycle = [0,1,2,3]
for turnindex in cycle(turncycle):
#.
#...turn stuff
#...turnindex is used for active player
#.
</code></pre>
<p>What I want to do is given a turn index s... | 0 | 2016-09-05T21:23:29Z | 39,338,299 | <p>Cobbled together something from the <a href="https://docs.python.org/2.7/library/itertools.html#recipes" rel="nofollow">itertools recipes</a></p>
<pre><code>import itertools
a = [0,1,2,3,4,5,6,7]
def consume(iterator, n):
"Advance the iterator n-steps ahead. If n is none, consume entirely."
# Use functions ... | 1 | 2016-09-05T22:20:06Z | [
"python",
"list",
"iteration",
"cycle"
] |
How to Detect an Empty Value | 39,337,888 | <p>I'm currently making a Python script for account creation. My script is as follows:</p>
<pre><code>import csv
nms = []
with open('nms.txt', newline='') as inputfile:
for row in csv.reader(inputfile):
nms.append(row)
counter = 0
## End of tings
while True:
print ("Please enter your us... | 1 | 2016-09-05T21:28:27Z | 39,337,936 | <p>I'm not sure I see the need for the counter variable, but you can check if an item exists in an iterable object with <code>in</code></p>
<pre><code>if usernm in nms:
# user already exists
</code></pre>
<blockquote>
<p>I've tried to stop the program checking if the username is equal to a blank value</p>
</bl... | 0 | 2016-09-05T21:33:46Z | [
"python",
"input",
null,
"value"
] |
python copy files with time stamp | 39,337,896 | <p>I would like to copy file with date time stamp. the below code is not working on windows. I am new to python so please help me. </p>
<pre><code>import shutil
import datetime
shutil.copyfile('C:\\Users\\Documents\\error.log','C:\\Users\\Documents\datetime.now().strftime("%Y%m%d-%H%M%S").log')
</code></pre>
| 2 | 2016-09-05T21:29:39Z | 39,337,988 | <p>In your code, you have the code enclosed in the string. You need to run the code out of the string, and combine it with the string. A solution would be</p>
<pre><code>import shutil
import datetime
shutil.copyfile('C:\\Users\\Documents\\error.log','C:\\Users\\Documents\' + datetime.now().strftime("%Y%m%d-%H%M%S") + ... | 1 | 2016-09-05T21:39:26Z | [
"python",
"shutil",
"copyfile"
] |
Accessing <li> element with no class id using Beautiful soup | 39,337,909 | <p>I am trying to scrape the companies in the li in the ul table under final result. The source code looks like this</p>
<p>import string
import re
import urllib2
import datetime
import bs4
from bs4 import BeautifulSoup</p>
<p>class AJSpider(object):</p>
<pre><code>def __init__(self):
print ("initisizing")
s... | 4 | 2016-09-05T21:30:48Z | 39,337,929 | <p>Find the <code>h3</code> element <em>by text</em> and get the <a href="https://www.crummy.com/software/BeautifulSoup/bs4/doc/#find-next-siblings-and-find-next-sibling" rel="nofollow">following <code>ul</code> list</a>:</p>
<pre><code>ul = soup.find("h3", text="Final Result").find_next_sibling("ul")
for li in ul.fin... | 3 | 2016-09-05T21:33:07Z | [
"python",
"html",
"beautifulsoup",
"html-lists"
] |
Django. Customize action for model | 39,338,058 | <p>I need to edit the "Add Object" action in the admin. It needs to redirect the user to a custom cause the logic required for adding objects is too complex to be managed in the admin. So, how do I make this possible? i.e:</p>
<p><a href="http://i.stack.imgur.com/ChoP7.jpg" rel="nofollow"><img src="http://i.stack.imgu... | 0 | 2016-09-05T21:47:27Z | 39,338,221 | <p>Override <code>change_list_template</code> html, the block <code>object-tools-items</code>. It's where add button is placed.</p>
<pre><code>class MyModelAdmin(admin.ModelAdmin):
change_list_template = 'change_list.html'
</code></pre>
<p>In your <code>change_list.html</code></p>
<pre><code>{% extends "admin/ch... | 1 | 2016-09-05T22:10:24Z | [
"python",
"django",
"django-admin"
] |
How to reference Django application url in admin index template | 39,338,080 | <p>I'm currently making changes to the admin/index.html template and I need to reference the url in my application using the name space 'hello' in a href tag for a link, but I'm having trouble doing at the admin level. The name of my application is clean and the url pattern in urls.py file is below.</p>
<pre><code>ur... | 0 | 2016-09-05T21:49:29Z | 39,338,374 | <p>You can simply use:</p>
<pre><code><div>
<h3>Hello World</h3>
<a href="{% url 'hello' %}">Test</a>
</div>
</code></pre>
<p>Django provides the ability to "reverse" URLs (i.e. provided the name of the URL, and arguments if necessary, the actual URL is generated) in order ... | 2 | 2016-09-05T22:29:44Z | [
"python",
"html",
"django"
] |
Kivy Checkbox restrict click | 39,338,204 | <p>I am trying to create a checkbox in my float layout area. I am getting the checkbox to generate but every time I click it goes from True to False even if it not on the box. Could someone provide some insight?</p>
<p>My code:</p>
<pre><code>from kivy.app import App
from kivy.lang import Builder
from kivy.uix.checkb... | 0 | 2016-09-05T22:07:50Z | 39,339,591 | <p>Try placing the CheckBox in a Widget and it works. I mean:</p>
<pre><code>FloatLayout:
Widget:
CheckBox:
pos_hint: {"x":0.2, "y":0.2}
on_release: True
TextInput:
id: a
font_size: 25
password: True
pos_hint: {"x":0.5, "y":0.5}
size_hint:... | 0 | 2016-09-06T01:57:53Z | [
"python",
"python-2.7",
"checkbox",
"kivy",
"kivy-language"
] |
How can I print out the correct response based on input? | 39,338,238 | <p>I'm new to Python and I have a very simple problem that I'd like explained to me. I'm making a text adventure game and I'd like to be able to call another function inside a function so my code is organized better. </p>
<p>This is what I have that's working:</p>
<pre><code>def displayIntro():
print("You come to... | -1 | 2016-09-05T22:12:09Z | 39,338,254 | <p>You're not passing the return value of <code>choosePath()</code> to <code>checkPath()</code>. It should be:</p>
<pre><code>path = choosePath()
checkPath(path)
</code></pre>
<p>Or as a one-liner:</p>
<pre><code>checkPath(choosePath())
</code></pre>
| 2 | 2016-09-05T22:15:04Z | [
"python"
] |
How can I print out the correct response based on input? | 39,338,238 | <p>I'm new to Python and I have a very simple problem that I'd like explained to me. I'm making a text adventure game and I'd like to be able to call another function inside a function so my code is organized better. </p>
<p>This is what I have that's working:</p>
<pre><code>def displayIntro():
print("You come to... | -1 | 2016-09-05T22:12:09Z | 39,338,261 | <p>You have to pass the return value of <code>choosePath</code> to <code>checkPath</code>.</p>
<pre><code>checkPath(choosePath())
</code></pre>
<p><code>checkPath</code> takes a parameter, so you need to supply a value. That value is the return value of <code>choosePath</code>, either "LEFT" or "RIGHT". Once you pass... | 1 | 2016-09-05T22:15:39Z | [
"python"
] |
Forbidden (CSRF token missing or incorrect.) Django + AngularJs | 39,338,369 | <p>When I try to render to my second page in my django framework I get following error. I think that there is something wrong with my url page and views.py but can't figure it out, nothing gives a step forward..</p>
<pre><code>Forbidden (CSRF token missing or incorrect.): /renderbonds
[06/Sep/2016 00:21:55] "POST /ren... | 0 | 2016-09-05T22:29:30Z | 39,338,383 | <p>The issue is not with your urls or your views, but with your template. Try adding <code>{% csrf_token %}</code> nested under your <code><form></form></code> tags in your template. </p>
<pre><code><form action="{% url 'renderbonds'%}" method="post" >
<input type="submit" value="calculate bon... | 2 | 2016-09-05T22:31:08Z | [
"python",
"angularjs",
"django"
] |
Python crash course 8-10 | 39,338,405 | <p>I'm currently reading Python Crash Course by Eric Matthes and doing some of the problem sets. One of them is giving me some difficulty and I was hoping someone could help me with it. </p>
<blockquote>
<p>8-9. Magicians: Make a list of magician's names. Pass the list to a function called show_magicians(), which pr... | 2 | 2016-09-05T22:34:05Z | 39,338,427 | <p>To do this, you can append to a string and reassign to add words to the end of each element:</p>
<pre><code>magician += " the great"
</code></pre>
<p>Here, the <code>+=</code> operator appends a string, then reassigns, which is equivalent to the following:</p>
<pre><code>magician = magician + " the great"
</c... | 1 | 2016-09-05T22:37:08Z | [
"python"
] |
Python crash course 8-10 | 39,338,405 | <p>I'm currently reading Python Crash Course by Eric Matthes and doing some of the problem sets. One of them is giving me some difficulty and I was hoping someone could help me with it. </p>
<blockquote>
<p>8-9. Magicians: Make a list of magician's names. Pass the list to a function called show_magicians(), which pr... | 2 | 2016-09-05T22:34:05Z | 39,338,440 | <p>Okay, you already know how to iterate through the list. You want to make a similar function, where you modify the string referred to my <code>magician</code> to say, "the Great".</p>
<p>So, if you had a string "Smedley" and you wanted to change that to a string "Smedley the Great" how would you do it?</p>
<p><stro... | 1 | 2016-09-05T22:38:29Z | [
"python"
] |
Python crash course 8-10 | 39,338,405 | <p>I'm currently reading Python Crash Course by Eric Matthes and doing some of the problem sets. One of them is giving me some difficulty and I was hoping someone could help me with it. </p>
<blockquote>
<p>8-9. Magicians: Make a list of magician's names. Pass the list to a function called show_magicians(), which pr... | 2 | 2016-09-05T22:34:05Z | 39,338,445 | <p>The question asks you to modify <code>magician_names</code>. Since each entry in <code>magician_names</code> is a <code>str</code>, and <code>strs</code> are unmodifiable, you cannot simply modify each <code>str</code> in <code>magician_names</code> by appending <code>" the great"</code> to it. Instead, you need to ... | 1 | 2016-09-05T22:38:54Z | [
"python"
] |
Quadractic Formula mix up | 39,338,450 | <p>So I made a python code that solves for x using the quadratic formula. Everything works out in the end except for the signs. For instance, if you want to factor x^2 + 10x + 25, my code outputs -5, -5 when the answer should be 5, 5.</p>
<pre><code>def quadratic_formula():
a = int(input("a = "))
b = int(input... | 3 | 2016-09-05T22:39:47Z | 39,338,510 | <p>Your solution is fine, let's prove it using <a href="http://www.sympy.org/en/index.html" rel="nofollow">sympy</a>:</p>
<pre><code>>>> (x**2+10*x+25).subs(x,-5)
0
</code></pre>
<p>As you can see, -5 is one of the roots while 5</p>
<pre><code>>>> (x**2+10*x+25).subs(x,5)
100
</code></pre>
<p>is n... | 5 | 2016-09-05T22:48:48Z | [
"python",
"math",
"quadratic"
] |
Curl "Connection Refused" when connecting to server with external IP address | 39,338,451 | <p>I've created a RESTful server and I can successfully make requests and get responses when I use my local IP address. I would like it to be exposed externally to the internet. I set up a port forwarding rule but I cannot seem to get things working. From what I'm reading the "Connection Refused" with (7) means some... | 1 | 2016-09-05T22:39:49Z | 39,338,861 | <p>I find it strange that you'd be getting connection refused from within the local network because the router should be able to detect that the external IP is a reference to itself. </p>
<p>That ability may depend on the router, but that's been my experience with networking. </p>
<p>That being said, if you'd like to... | 1 | 2016-09-05T23:49:17Z | [
"python",
"curl",
"networking",
"portforwarding"
] |
Time complexity for a sublist in Python | 39,338,520 | <p>In Python, what is the time complexity when we create a sublist from an existing list?</p>
<p>For example, here data is the name of our existing list and list1 is our sublist created by slicing data.</p>
<pre><code>data = [1,2,3,4,5,6..100,...1000....,10^6]
list1 = data[101:10^6]
</code></pre>
<p>What is the run... | 4 | 2016-09-05T22:49:38Z | 39,338,537 | <p>Getting a list slice in python is <code>O(M - N)</code> / <code>O(10^6 - 101)</code></p>
<p><a href="https://wiki.python.org/moin/TimeComplexity">Here</a> you can check python list operations time complexity </p>
<p>By underneath, python lists are represented like arrays. So, you can iterate starting on some inde... | 7 | 2016-09-05T22:51:56Z | [
"python",
"performance",
"list",
"big-o",
"sublist"
] |
Cut a polygon with two lines in shapely | 39,338,550 | <p>I am trying to cut a <code>shapely.geometry.Polygon</code> instance into two parts with two lines. For example, in the code below, <code>polygon</code> is a ring and if we cut it with <code>line1</code> and <code>line2</code> we should get two partial rings, one w/ 270 degrees and one with 90 degrees. Would there be... | 1 | 2016-09-05T22:53:56Z | 39,340,336 | <p>Ken Watford answered <a href="http://community-gispython-org-community-projects.955323.n3.nabble.com/Community-Shapely-how-to-split-a-polygon-with-a-line-td1915160.html" rel="nofollow">here</a> about using <code>buffer</code> and <code>difference</code> to do the trick, w/ the drawback of losing a bit of the area. A... | 1 | 2016-09-06T03:46:11Z | [
"python",
"shapely"
] |
How to place marker on one line and get coordinates | 39,338,575 | <p>1)I want to place a marker on one line,(between two points) in function of the lenght of the line.</p>
<p>2)I want to know the coordinates of this point/marker.</p>
<pre><code>import matplotlib.pyplot as plt
import math
x1 = 0
x2 = 9
y1 = 5
y2 = 7
plt.plot((x1, x2), (y1, y2))
lenghtline1 = math.sqrt((x1-x2)**2 + (... | 0 | 2016-09-05T22:58:24Z | 39,339,391 | <p>Point with distance <code>len</code> to the first point will have coordinates</p>
<pre><code> x = x1 + (x2-x1) * len / lenghtline1
y = y1 + (y2-y1) * len / lenghtline1
</code></pre>
| 0 | 2016-09-06T01:22:45Z | [
"python",
"python-3.x",
"numpy",
"math",
"matplotlib"
] |
How to place marker on one line and get coordinates | 39,338,575 | <p>1)I want to place a marker on one line,(between two points) in function of the lenght of the line.</p>
<p>2)I want to know the coordinates of this point/marker.</p>
<pre><code>import matplotlib.pyplot as plt
import math
x1 = 0
x2 = 9
y1 = 5
y2 = 7
plt.plot((x1, x2), (y1, y2))
lenghtline1 = math.sqrt((x1-x2)**2 + (... | 0 | 2016-09-05T22:58:24Z | 39,350,709 | <pre><code>from pylab import *
from scipy import interpolate
x = rand(21).cumsum() # create some 21 random x values
y = rand(len(x)) # the corresponding y values
plot(x, y, ".-")
xc = x[:-1] + diff(x)/2.
yc = interpolate.interp1d(x, y, kind="linear")(xc) # (xc, yc) are the marker positions
lengths = sqrt(diff(x)**... | 0 | 2016-09-06T13:49:43Z | [
"python",
"python-3.x",
"numpy",
"math",
"matplotlib"
] |
Can't connect to mysql using sqlalchemy. Library not loaded error | 39,338,631 | <p>I am trying to run a simple test code to connect ti a mysql db using sql alchemy.
The code is as follows:</p>
<pre><code>from sqlalchemy import (create_engine, Table, Column, Integer, String, MetaData)
import settings
import sys
try:
db = create_engine('mysql://daniel:dani@localhost/test')
db.connect()
exce... | 0 | 2016-09-05T23:06:03Z | 39,338,962 | <p>I also had some problems with SQLAlchemy with mysql, i changed localhost in the create_engine to 127.0.0.1:port, and also had to use pymysql. Ended up working with this:</p>
<p><code>engine = create_engine('mysql+pymysql://user:[email protected]:port/db')</code></p>
<p>pymysql is installed via pip.</p>
| 0 | 2016-09-06T00:05:50Z | [
"python",
"mysql",
"sqlalchemy"
] |
Can't connect to mysql using sqlalchemy. Library not loaded error | 39,338,631 | <p>I am trying to run a simple test code to connect ti a mysql db using sql alchemy.
The code is as follows:</p>
<pre><code>from sqlalchemy import (create_engine, Table, Column, Integer, String, MetaData)
import settings
import sys
try:
db = create_engine('mysql://daniel:dani@localhost/test')
db.connect()
exce... | 0 | 2016-09-05T23:06:03Z | 39,341,459 | <p>You are using python , so you have add mysqldb with mysql. Try the below code.</p>
<pre><code>try:
db = create_engine('mysql+mysqldb://daniel:dani@localhost/test')
db.connect()
except:
print('opps ', sys.exc_info()[1])
</code></pre>
| 0 | 2016-09-06T05:49:25Z | [
"python",
"mysql",
"sqlalchemy"
] |
How to get results from pyparsing Forward object? | 39,338,654 | <p>Let us assume we have the following string</p>
<pre><code>string = """
object obj1{
attr1 value1;
object obj2 {
attr2 value2;
}
}
object obj3{
attr3 value3;
attr4 value4;
}
"""
</code></pre>
<p>There is a nested object, and we use Forward to parse this. </p>
<pre><code>from pyparsi... | 1 | 2016-09-05T23:10:41Z | 39,339,359 | <p>I was able to work around this by using <code>listAllMatches=True</code> in the setResultsNames function. This gave me as asXML() result that had structure that I could retrieve information from. It still relies on the order of the XML and requires using zip for get the <code>name</code> and <code>value</code> for a... | 2 | 2016-09-06T01:17:03Z | [
"python",
"pyparsing"
] |
How to get results from pyparsing Forward object? | 39,338,654 | <p>Let us assume we have the following string</p>
<pre><code>string = """
object obj1{
attr1 value1;
object obj2 {
attr2 value2;
}
}
object obj3{
attr3 value3;
attr4 value4;
}
"""
</code></pre>
<p>There is a nested object, and we use Forward to parse this. </p>
<pre><code>from pyparsi... | 1 | 2016-09-05T23:10:41Z | 39,438,974 | <p>While you have successfully processed your input string, let me suggest some refinements to your grammar.</p>
<p>When defining a recursive grammar, one usually wants to maintain some structure in the output results. In your case, the logical piece to structure is the content of each object, which is surrounded by o... | 1 | 2016-09-11T17:50:04Z | [
"python",
"pyparsing"
] |
how to reference angular component template from django app | 39,338,707 | <p>I have the following angular component:</p>
<pre><code>angular.
module('phoneList').
component('phoneList', {
templateUrl: 'phone-list.template.html',
controller: function PhoneListController() {
this.phones = [
{
name: 'Nexus S',
snippet: 'Fast just got faster with Nexus S.',
... | 0 | 2016-09-05T23:20:37Z | 39,338,813 | <p>Templates in the <code>templates</code> folder in Django are available to the template loader only. They are not served and can not be accessed via HTTP directly. But that is what Angular does.</p>
<p>If you need to render the template in Django, make sure you have created a view and an endpoint for it in your <cod... | 2 | 2016-09-05T23:38:47Z | [
"python",
"angularjs",
"node.js",
"django"
] |
ElementTree Write to an XML | 39,338,733 | <p>What's the easiest way to write an edited XML root to a new file? This is what I have so far and it's throwing <strong>AttributeError: 'module' object has no attribute 'write'</strong> <br>
PS: I can't use any other api besides ElementTree.</p>
<pre><code>import xml.etree.ElementTree as ET
from xml.etree.ElementTre... | 0 | 2016-09-05T23:25:18Z | 39,338,848 | <p><strong>AttributeError: 'module' object has no attribute 'write'</strong> is saying that you cannot call the write method directly from ElementTree class, it is not a static method, try using <code>tree.write('file-after-edits.xml')</code>, tree is your object from ElementTree.</p>
| 0 | 2016-09-05T23:45:40Z | [
"python",
"xml",
"elementtree"
] |
ElementTree Write to an XML | 39,338,733 | <p>What's the easiest way to write an edited XML root to a new file? This is what I have so far and it's throwing <strong>AttributeError: 'module' object has no attribute 'write'</strong> <br>
PS: I can't use any other api besides ElementTree.</p>
<pre><code>import xml.etree.ElementTree as ET
from xml.etree.ElementTre... | 0 | 2016-09-05T23:25:18Z | 39,338,941 | <p>Your <code>tree</code> is a <code>ElementTree</code> object which provides a <a href="https://docs.python.org/3/library/xml.etree.elementtree.html#xml.etree.ElementTree.ElementTree.write" rel="nofollow"><code>write()</code></a> method to write the tree. For example:</p>
<pre><code>#Process XML here
tree.write('file... | 0 | 2016-09-06T00:02:26Z | [
"python",
"xml",
"elementtree"
] |
Pandas pd.DataFrame converts to Tuples instead of Dataframe | 39,338,746 | <p>I first use BeautifulSoup:</p>
<pre><code>mydivs = soup.findAll('div', {"class": "content"})
</code></pre>
<p>so that each <code>mydiv</code> in <code>mydivs</code> looks like this for example:</p>
<pre><code><div class="content">A number of hats by me <br/><br/>three now though ... </div>... | 2 | 2016-09-05T23:26:45Z | 39,338,796 | <p>shape is an attribute of <code>DF</code>. That attribute is a <code>tuple</code>. You are trying to call it with the <code>()</code> which is throwing the error. If you want the shape just do <code>DF.shape</code></p>
<pre><code>print DF.shape
</code></pre>
<p><strong><em>not</em></strong></p>
<pre><code>print DF... | 4 | 2016-09-05T23:35:01Z | [
"python",
"pandas",
"dataframe"
] |
Finding the highest value with the given constraints | 39,338,764 | <pre><code>c = [416,585,464]
A0 = [100,50,200]
A1 = [100,100,200]
A2 = [100,150,100]
A3 = [100,200,0]
A4 = [100,250,0]
b = [300,300,300,300,300]
for num in A0,A1,A2,A3,A4:
t0 = num[0]*1 + num[1]*1 + num[2]*1
t1 = num[0]*0 + num[1]*1 + num[2]*0
t2 = num[0]*0 + num[1]*0 + num[2]*0
t3 = num[0]*0 + num[1... | -3 | 2016-09-05T23:29:24Z | 39,340,214 | <p>I guess this does what you wantâat least it produces sums from the data similar to those you mentioned in your question. I found your sample code is <em>very</em> misleading since it doesn't produce the kind of <code>t_</code> values you refer to in the written problem description below it.</p>
<pre><code>from i... | 0 | 2016-09-06T03:28:13Z | [
"python",
"arrays",
"list"
] |
Insertion-sort error in Python | 39,338,851 | <p>I am trying to make an insertion sorting program that sorted a list in ascending order. I'm getting the error:</p>
<pre><code>line 16, in <module> if listNums[x] < listNums[i]:
</code></pre>
<p>For this program: </p>
<pre><code> listNums = [54, 21, 76, 43, 65, 98, 65, 32, 34, 38]
x = 1
i = 0
... | 0 | 2016-09-05T23:46:34Z | 39,338,863 | <p>Chances are it's a bounds error because <code>x</code> eventually increments up to <code>len(listNums)</code> which is 1 beyond the bounds of the zero-indexed array.</p>
<p>Try only iterating through <code>range(0, len(listNums)-1)</code>.</p>
| 1 | 2016-09-05T23:49:31Z | [
"python",
"python-3.x",
"insertion-sort"
] |
Insertion-sort error in Python | 39,338,851 | <p>I am trying to make an insertion sorting program that sorted a list in ascending order. I'm getting the error:</p>
<pre><code>line 16, in <module> if listNums[x] < listNums[i]:
</code></pre>
<p>For this program: </p>
<pre><code> listNums = [54, 21, 76, 43, 65, 98, 65, 32, 34, 38]
x = 1
i = 0
... | 0 | 2016-09-05T23:46:34Z | 39,339,420 | <p>I'd just like to point out that there is a better way to do it, namely</p>
<pre><code>listNums = [54, 21, 76, 43, 65, 98, 65, 32, 34, 38]
listNums.sort()
print listNums
</code></pre>
<p>which gives </p>
<pre><code>[21, 32, 34, 38, 43, 54, 65, 65, 76, 98]
=> None
</code></pre>
<p>(compiled on repl.it)</p>
... | 0 | 2016-09-06T01:28:39Z | [
"python",
"python-3.x",
"insertion-sort"
] |
Insertion-sort error in Python | 39,338,851 | <p>I am trying to make an insertion sorting program that sorted a list in ascending order. I'm getting the error:</p>
<pre><code>line 16, in <module> if listNums[x] < listNums[i]:
</code></pre>
<p>For this program: </p>
<pre><code> listNums = [54, 21, 76, 43, 65, 98, 65, 32, 34, 38]
x = 1
i = 0
... | 0 | 2016-09-05T23:46:34Z | 39,363,625 | <p>This is not an <code>insertion sort error</code>
In the last iteration i.e. len(listNums)th iteration, the value of x goes beyond the length of list that's why it gives <code>IndexError: list index out of range</code> </p>
| 0 | 2016-09-07T07:21:58Z | [
"python",
"python-3.x",
"insertion-sort"
] |
Parsing with multiple loops opening files | 39,339,007 | <p>I'm trying to count the number of lines contained by a file that looks like this:</p>
<pre><code>-StartACheck
---Lines--
-EndACheck
-StartBCheck
---Lines--
-EndBCheck
</code></pre>
<p>with this:</p>
<pre><code>count=0
z={}
for line in file:
s=re.search(r'\-+Start([A-Za-z0-9]+)Check',line)
if s:
... | -1 | 2016-09-06T00:14:44Z | 39,340,686 | <p>This kind of problem can be resolved with a <a href="https://en.wikipedia.org/wiki/Finite-state_machine" rel="nofollow">finite state machine</a>. This is a complex matter that would need more explanation than what I could write here. You should look into it to further understand what you can do with it. </p>
<p>But... | 0 | 2016-09-06T04:31:03Z | [
"python",
"python-2.7"
] |
How to write large JSON data? | 39,339,044 | <p>I have been trying to write large amount (>800mb) of data to JSON file; I did some fair amount of trial and error to get this code:</p>
<pre><code>def write_to_cube(data):
with open('test.json') as file1:
temp_data = json.load(file1)
temp_data.update(data)
file1.close()
with open('test.js... | 0 | 2016-09-06T00:21:56Z | 39,340,868 | <p>So the problem is that you have a long operation. Here are a few approaches that I usually do:</p>
<ol>
<li>Optimize the operation: This rarely works. I wouldn't recommend any superb library that would parse the json a few seconds faster</li>
<li>Change your logic: If the purpose is to save and load data, probably ... | 0 | 2016-09-06T04:51:10Z | [
"python",
"json"
] |
Is it possible write a single def for both ComboBox and RadioBox events? | 39,339,124 | <p>Here the code writes parts of a string selected by the user. After each event, the TextCtrl gains one more piece of the string until it's time to the user to copy the text to the clipboard. It works fine, but it's not elegant since there is too much repetition in the code.</p>
<pre><code>import wx
import pypercl... | 0 | 2016-09-06T00:36:11Z | 39,339,386 | <p>You can use <code>e.GetEventObject()</code> to get access to widget which send event.</p>
<p>And then you can use <code>isinstance</code> to recognize widget type.</p>
<pre><code>def onSelect(self, e):
widget = e.GetEventObject()
if isinstance(widget, wx.RadioBox):
self.t3.AppendText(str(widget.GetStri... | 0 | 2016-09-06T01:20:54Z | [
"python",
"wxpython"
] |
pandas read_csv and keep only certain rows (python) | 39,339,142 | <p>I am aware of the skiprows that allows you to pass a list with the indices of the rows to skip. However, I have the index of the rows I want to keep.</p>
<p>Say that my cvs file looks like this for millions of rows:</p>
<pre><code> A B
0 1 2
1 3 4
2 5 6
3 7 8
4 9 0
</code></pre>
<p>The list of indices i would li... | 2 | 2016-09-06T00:39:34Z | 39,339,691 | <p>I think you would need to find the number of lines first, like <a href="http://stackoverflow.com/a/1019572/2029132">this</a>.</p>
<pre><code>num_lines = sum(1 for line in open('myfile.txt'))
</code></pre>
<p>Then you would need to delete the indices of <code>index_list</code>:</p>
<pre><code>to_exclude = [i for i... | 2 | 2016-09-06T02:14:44Z | [
"python",
"pandas"
] |
Get href from leftmost column in table with XPath | 39,339,188 | <p>I am attempted to extract <code>href</code> text from a table here: <a href="https://en.wikipedia.org/wiki/List_of_first-person_shooters" rel="nofollow">https://en.wikipedia.org/wiki/List_of_first-person_shooters</a></p>
<p>Here is the top of the table:</p>
<pre><code><table class="wikitable sortable" style="fo... | 2 | 2016-09-06T00:47:17Z | 39,339,244 | <p>Only first column use <code><th></code> and <code><i></code> so use it</p>
<pre><code>tree.xpath('//table[@class="wikitable sortable"]//th//a/@href')
</code></pre>
<p>or</p>
<pre><code>tree.xpath('//table[@class="wikitable sortable"]//i/a/@href')
</code></pre>
| -1 | 2016-09-06T00:57:51Z | [
"python",
"html",
"xml",
"xpath",
"lxml"
] |
Get href from leftmost column in table with XPath | 39,339,188 | <p>I am attempted to extract <code>href</code> text from a table here: <a href="https://en.wikipedia.org/wiki/List_of_first-person_shooters" rel="nofollow">https://en.wikipedia.org/wiki/List_of_first-person_shooters</a></p>
<p>Here is the top of the table:</p>
<pre><code><table class="wikitable sortable" style="fo... | 2 | 2016-09-06T00:47:17Z | 39,339,558 | <blockquote>
<p>I only want the first column from each row</p>
</blockquote>
<p>This XPath,</p>
<pre><code> //table[@class="wikitable sortable"]//tr/*[1]//a/@href
</code></pre>
<p>will select only the <code>a/@href</code> found in the first column of each <code>tr</code>:</p>
<pre><code>/wiki/007_Legends
/wiki/00... | 1 | 2016-09-06T01:53:33Z | [
"python",
"html",
"xml",
"xpath",
"lxml"
] |
Difference between self.request and request in Django class-based view | 39,339,221 | <p>In django, for class-based view like <code>ListView</code> and <code>DetailView</code>, methods like <code>get()</code> or <code>post()</code> or other functions defined by developer take parameters include <code>self</code> and <code>request</code>. I learnt that in <code>self</code> these is actually a <code>self.... | 3 | 2016-09-06T00:52:41Z | 39,340,089 | <p>For a subclass of <code>View</code>, they're the same object. <code>self.request = request</code> is set in <code>view</code> function that <code>as_view()</code> returns. I looked into the history, but only found setting <code>self.request</code> and then immediately passing request into the view function.</p>
| 0 | 2016-09-06T03:11:32Z | [
"python",
"django"
] |
Django passing a variable to Httpresponseredirect throws exception | 39,339,237 | <p>The problem I Have right now is that I get a :</p>
<p>Reverse for 'documentation' with arguments '(1,)' and keyword arguments '{}' not found. 0 pattern(s) tried: []</p>
<p>when I try to redirect to another view using HttpResponseRedirect</p>
<p>Here is my urls.py</p>
<pre><code> url(r'^documentation/([0-9])/$... | 0 | 2016-09-06T00:56:22Z | 39,339,361 | <p>I think the problem is not with the HttpResponseRedirect, but with the call to reverse().</p>
<p>When you pass args, you should use the list notation for the values:</p>
<pre><code>return HttpResponseRedirect(reverse('documentation', args=[b]))
</code></pre>
<p>That should help, at least.</p>
| 0 | 2016-09-06T01:17:26Z | [
"python",
"django"
] |
What data structure should I use to process large amounts of text data? | 39,339,357 | <p>I'm trying to do some text classication using scikit-learn's TfidfVectorizer and the Nearest Neighbor algorithm.</p>
<p>I need to find similarity metrics between two data sets containing 18000 entries each. I'm unsure about what data structure can be best used to calculate what I think should be 18000*18000 similar... | -1 | 2016-09-06T01:16:48Z | 39,339,780 | <p>If you don't need any intermediate data for further analyses you can use a generator to hold your data points then run the algorithms through generators calls. Otherwise you'd probably want a list.</p>
| 0 | 2016-09-06T02:29:29Z | [
"python",
"numpy",
"scikit-learn",
"text-processing"
] |
Grok learning python programming | 39,339,374 | <p>I am wondering how to solve this problem:</p>
<p>You are curious about the most popular and least popular colours of cars and decide to write a program to calculate the frequency of car colours.</p>
<p>Your program should read in the colour of each car until a blank line is entered, and then print out (in any orde... | -4 | 2016-09-06T01:19:47Z | 39,339,438 | <p>You have to call <code>input</code> multiple times with a sentinel value, then count the objects, then iterate over the keys and values, and then print a formatted string for each count. Reasonably straightforward with one line of code:</p>
<pre><code>print(*('Cars that are {}: {}'.format(*item) for item in __impor... | 0 | 2016-09-06T01:32:54Z | [
"python"
] |
Iterate through the rows of a dataframe and reassign minimum values by group | 39,339,401 | <p>I am working with a dataframe that looks like this.</p>
<pre><code> id time diff
0 0 34 nan
1 0 36 2
2 1 43 7
3 1 55 12
4 1 59 4
5 2 2 -57
6 2 10 8
</code></pre>
<p>What is an efficient way find the minimum values for 'time' by id, then set 'diff' to nan at those minimum values. I am ... | 4 | 2016-09-06T01:24:38Z | 39,339,552 | <p>You can group the time by id and calculate a logical vector where if the time is minimum within the group, the value is True, else False, and use the logical vector to assign <code>NaN</code> to the corresponding rows:</p>
<pre><code>import numpy as np
import pandas as pd
df.loc[df.groupby('id')['time'].apply(lambd... | 4 | 2016-09-06T01:52:43Z | [
"python",
"pandas"
] |
Iterate through the rows of a dataframe and reassign minimum values by group | 39,339,401 | <p>I am working with a dataframe that looks like this.</p>
<pre><code> id time diff
0 0 34 nan
1 0 36 2
2 1 43 7
3 1 55 12
4 1 59 4
5 2 2 -57
6 2 10 8
</code></pre>
<p>What is an efficient way find the minimum values for 'time' by id, then set 'diff' to nan at those minimum values. I am ... | 4 | 2016-09-06T01:24:38Z | 39,339,583 | <p><code>groupby('id')</code> and use <code>idxmin</code> to find the location of minimum values of <code>'time'</code>. Finally, use <code>loc</code> to assign <code>np.nan</code></p>
<pre><code>df.loc[df.groupby('id').time.idxmin(), 'diff'] = np.nan
df
</code></pre>
<p><a href="http://i.stack.imgur.com/qsTwZ.png">... | 6 | 2016-09-06T01:57:03Z | [
"python",
"pandas"
] |
Start inner loop from position of the outer | 39,339,476 | <p>In my example I have two loops. One nested within the other. Is there a way I can start the inner loop from the index of the outer. Here is pseudo code. </p>
<pre><code>arrayOfWords = ["one","two","five"]
arrayOfWords2 = ["one","two","three","four","five"]
tottalWordlist = []
for index, jString in enumerate(arrayOf... | 0 | 2016-09-06T01:40:25Z | 39,339,509 | <p>You're almost there. You just need to add the starting index to the <code>range</code> object.</p>
<pre><code>arrayOfWords2Count = range(indexClone, len(arrayOfWords2))
for i in arrayOfWords2Count:
if gWord == arrayOfWords2[i]:
</code></pre>
<p>Also, you don't need to subtract one from the endpoint, as that en... | 4 | 2016-09-06T01:45:07Z | [
"python"
] |
Start inner loop from position of the outer | 39,339,476 | <p>In my example I have two loops. One nested within the other. Is there a way I can start the inner loop from the index of the outer. Here is pseudo code. </p>
<pre><code>arrayOfWords = ["one","two","five"]
arrayOfWords2 = ["one","two","three","four","five"]
tottalWordlist = []
for index, jString in enumerate(arrayOf... | 0 | 2016-09-06T01:40:25Z | 39,339,590 | <p>in my understanding, you are looking for whether outer list's element in inner list begin with outer element's index.</p>
<pre><code>arrayOfWords = ["one","two","five"]
arrayOfWords2 = ["one","two","three","four","five"]
print [ item for i,item in enumerate(arrayOfWords) if item in arrayOfWords2[i:] ]
['one', 't... | 2 | 2016-09-06T01:57:44Z | [
"python"
] |
The right syntax to use near '''? | 39,339,512 | <p>I am running a Python bot which connects to a SQL database and updates values in tables.</p>
<p>I have the following code:</p>
<p><code>mycursor.execute("SELECT * FROM reputation WHERE username = '" + str(critiquer) + "'")</code></p>
<p>I am receiving the error "...check the manual that corresponds to your MySQL ... | -2 | 2016-09-06T01:45:17Z | 39,339,561 | <p>Try using a parametrized query:</p>
<pre><code>mycursor.execute("SELECT * FROM reputation WHERE username = '?'", critiquer)
</code></pre>
| 1 | 2016-09-06T01:54:22Z | [
"python",
"mysql"
] |
How to transform several lists of words to a pandas dataframe? | 39,339,560 | <p>I have file .txt that contains a list of words like this:</p>
<pre><code>5.91686268506 exclusively, catering, provides, arms, georgia, formal, purchase, choose
5.91560417296 hugh, senlis
5.91527936181 italians
5.91470429433 soil, cultivation, fertile
5.91468087491 increases, moderation
....
5.91440227412 farmers, d... | 2 | 2016-09-06T01:54:02Z | 39,339,609 | <p>Because you have space between words and if you specify space as delimiter, it will naturally separate them. To get what you need, you can try to set the <code>sep</code> as a regular expression <code>(?<!,)</code>, <code>?<!</code> is a negative look behind syntax, which means separate on space only when it i... | 6 | 2016-09-06T02:00:10Z | [
"python",
"python-3.x",
"csv",
"pandas"
] |
Django custom context_processors in render_to_string method | 39,339,569 | <p>I'm building a function to send email and I need to use a context_processor variable inside the HTML template of the email, but this don't work.</p>
<p>Example:</p>
<pre><code>def send_email(plain_body_template_name, html_body_template_name):
plain_body = loader.render_to_string(plain_body_template_name, conte... | 0 | 2016-09-06T01:55:24Z | 39,340,015 | <p>Assuming you're using the <code>django</code> backend in your <code>TEMPLATE</code> with</p>
<p><code>'BACKEND': 'django.template.backends.django.DjangoTemplates',
</code></p>
<p>django is seeing that you haven't passed in a request and opting for a basic <code>Context</code> to wrap your dict instead of a <code>R... | 1 | 2016-09-06T03:02:31Z | [
"python",
"django"
] |
Why am I getting the following error: NameError: name 'models' is not defined | 39,339,593 | <p>Whenever I run the program, I get the following error:</p>
<pre><code>NameError at /table/
name 'models' is not defined
</code></pre>
<p>It says that there's an error on line 4 in my views. </p>
<p>Here is my views.py:</p>
<pre><code>from django.shortcuts import render
def display(request):
return render(re... | -1 | 2016-09-06T01:57:55Z | 39,339,611 | <p>You are referencing <code>models.Book</code> in your view, but you have not imported <code>models</code>. In your views.py you need to do <code>from myapp import models</code>. Or you can do <code>from myapp.models import Book</code> and change it in your view function to just <code>Book.objects.all()</code>.</p>
| 4 | 2016-09-06T02:00:45Z | [
"python",
"django"
] |
Removing "\n"s when printing sentences from text file in python? | 39,339,621 | <p>I am trying to print a list of sentences from a text file (one of the Project Gutenberg eBooks). When I print the file as a single string string it looks fine:</p>
<pre><code>file = open('11.txt','r+')
alice = file.read()
print(alice[:500])
</code></pre>
<p>Output is:</p>
<pre><code>ALICE'S ADVENTURES IN WONDERLA... | -1 | 2016-09-06T02:01:53Z | 39,339,657 | <p>The <code>\n</code>, or newline, characters come from the blank lines in the file. They are an escape character that basically acts like a hit on the 'return' key. On the first line, it ends with a <code>\n</code> character, and next line also ends in a <code>\n</code>.</p>
<p>To remove them what you can do is loop... | 0 | 2016-09-06T02:08:27Z | [
"python",
"split",
"format",
"sentence"
] |
Removing "\n"s when printing sentences from text file in python? | 39,339,621 | <p>I am trying to print a list of sentences from a text file (one of the Project Gutenberg eBooks). When I print the file as a single string string it looks fine:</p>
<pre><code>file = open('11.txt','r+')
alice = file.read()
print(alice[:500])
</code></pre>
<p>Output is:</p>
<pre><code>ALICE'S ADVENTURES IN WONDERLA... | -1 | 2016-09-06T02:01:53Z | 39,339,696 | <p>You may not want to use regex, but I would do:</p>
<pre><code>import re
new_sentences = []
for s in sentences:
new_sentences.append(re.sub(r'\n{2,}', '\n', s))
</code></pre>
<p>This should replace all instances of two or more <code>'\n'</code> with a single newline, so you still have newlines, but don't have "... | 2 | 2016-09-06T02:16:28Z | [
"python",
"split",
"format",
"sentence"
] |
Removing "\n"s when printing sentences from text file in python? | 39,339,621 | <p>I am trying to print a list of sentences from a text file (one of the Project Gutenberg eBooks). When I print the file as a single string string it looks fine:</p>
<pre><code>file = open('11.txt','r+')
alice = file.read()
print(alice[:500])
</code></pre>
<p>Output is:</p>
<pre><code>ALICE'S ADVENTURES IN WONDERLA... | -1 | 2016-09-06T02:01:53Z | 39,339,706 | <p>You'll understand where the <code>\n</code> characters come from with this little example:</p>
<pre><code>alice = """ALICE'S ADVENTURES IN WONDERLAND
Lewis Carroll
THE MILLENNIUM FULCRUM EDITION 3.0
CHAPTER I. Down the Rabbit-Hole
Alice was beginning to get very tired of sitting by her sister on the
bank, an... | 1 | 2016-09-06T02:17:46Z | [
"python",
"split",
"format",
"sentence"
] |
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