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 |
|---|---|---|---|---|---|---|---|---|---|
Testing ModelSerializers | 39,180,100 | <p>I am trying to learn the best way to test my serializers but having some issues. In the below example I am testing to see if creating new users works correctly. ie can hash the password. The error i am getting is:</p>
<blockquote>
<p>TypeError: create() missing 1 required positional argument:
'validated_data'</... | 0 | 2016-08-27T10:29:43Z | 39,201,791 | <p>You called <code>create</code> in your test. You should call <code>is_valid</code> and then <code>save</code>.</p>
<pre><code>user = UserSerializer(data=data, context=self.serializer_context)
user.is_valid(raise_exception=True)
user.save()
</code></pre>
| 0 | 2016-08-29T08:33:09Z | [
"python",
"django",
"django-rest-framework"
] |
Python, bs4: Tags in inspection are nowhere to be found when parsing | 39,180,183 | <p>I run into an unexpected problem, I am using Python 3.5 and BeautifulSoup.
I want to parse the following link:</p>
<pre><code>url = 'https://www.leboncoin.fr/chaussures/627533472.htm?ca=16_s'
import requests, bs4
res = requests.get(url)
res.raise_for_status()
DicoSoup = bs4.BeautifulSoup(res.text, "lxml")
</code></... | 1 | 2016-08-27T10:39:36Z | 39,180,247 | <p>As I commented the thumbnails are dynamically generated using JS but you can get the script and parse the paths:</p>
<pre><code>soup = BeautifulSoup(requests.get("https://www.leboncoin.fr/chaussures/627533472.htm?ca=16_s").content)
script = soup.select_one("div.thumbnails").find_next("script")
print(script.text.st... | 1 | 2016-08-27T10:47:55Z | [
"python",
"parsing",
"tags",
"beautifulsoup"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,261 | <p>You can use
<a href="https://docs.python.org/2/library/functions.html#filter" rel="nofollow">filter</a></p>
<pre><code>>>> mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
>>> filter(lambda x:x!=2, mylist)
[1, 1, 1, 3, 4, 5, 1, 3]
</code></pre>
<p>Or simple list comprehension.</p>
<pre><code>my_list = [i for... | 3 | 2016-08-27T10:49:37Z | [
"python",
"python-2.7"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,278 | <pre><code>mylist = [x for x in mylist if x != 2]
</code></pre>
<p>This is simpler than a filter.</p>
| 1 | 2016-08-27T10:51:20Z | [
"python",
"python-2.7"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,279 | <p>Using a list comprehension is probably the most pythonic way of doing this:</p>
<pre><code>mylist = [number for number in mylist if number != 2]
</code></pre>
<p>This is because <code>list.remove(x)</code> only removes the first occurrence of <code>x</code> in the list. The above solution will create a new list ba... | 1 | 2016-08-27T10:51:30Z | [
"python",
"python-2.7"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,286 | <p><a href="https://docs.python.org/3.5/tutorial/datastructures.html" rel="nofollow">According to docs</a>, this behavior is expected:</p>
<blockquote>
<p><code>list.remove(x)</code></p>
<p><strong>Remove the first item from the list whose value is x</strong>. It is an error if there is no such item.</p>
</bloc... | 1 | 2016-08-27T10:52:03Z | [
"python",
"python-2.7"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,363 | <p>From python help:</p>
<pre><code>help(list.remove)
</code></pre>
<p>you can get this explanation:</p>
<blockquote>
<p>L.remove(value) -- remove first occurrence of value.
Raises ValueError if the value is not present.</p>
</blockquote>
<p>You can achieve it by using list comprehension:</p>
<pre><code>my... | 1 | 2016-08-27T11:00:15Z | [
"python",
"python-2.7"
] |
Python List and remove a variable | 39,180,248 | <p>I am new to programming. I was trying to understand different data structure in python. In List i was trying:</p>
<pre><code>mylist = [1,2,1,2,1,2,3,4,5,1,2,3]
print mylist
mylist.remove(2)
print mylist
</code></pre>
<p>It is supposed to remove 2 from the list. It does but the first one only.
The output is like:</... | 0 | 2016-08-27T10:48:04Z | 39,180,396 | <p>another way(if you wont create new list):</p>
<pre><code>while 2 in mylist:
mylist.remove(2)
</code></pre>
| 0 | 2016-08-27T11:04:25Z | [
"python",
"python-2.7"
] |
Finding solution of differential equation | 39,180,301 | <p>I want to find a root X of equation below</p>
<p><a href="http://i.stack.imgur.com/CClq1.png" rel="nofollow"><img src="http://i.stack.imgur.com/CClq1.png" alt="equation"></a></p>
<p>Given Ls is length of something,f is frequency, X is a function of frequency, tgn is group delay and λ_0 is free space wavelength. I... | 0 | 2016-08-27T10:53:49Z | 39,202,795 | <p>If you want to solve a differential equation, you need some initial state information. Then you can either write your own solver, simplest solution would probably be explicit euler, alternatively you can look into this:</p>
<p><a href="http://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.odeint.html#... | 0 | 2016-08-29T09:28:32Z | [
"python",
"scipy",
"differential-equations"
] |
Re format a python string after splitting | 39,180,334 | <p>I have string like "week32_Aug_24_2016".
I want to change this string like "week32_2016_Aug_24"
I have tried this. </p>
<pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
newstr = wk[0]+" "+wk[3]+" "+wk[1]+" "+wk[2]
</code></pre>
<p>My expected output is "week32 2016 Aug 24".
I already got that but I want t... | 0 | 2016-08-27T10:57:03Z | 39,180,411 | <p>You can make use of both <a href="https://docs.python.org/3/library/stdtypes.html#str.split" rel="nofollow"><code>str.split()</code></a> and <a href="https://docs.python.org/3/library/stdtypes.html#str.join" rel="nofollow"><code>str.join()</code></a>, simply like this:</p>
<pre><code>string = "week32_Aug_24_2016"
o... | 4 | 2016-08-27T11:05:31Z | [
"python"
] |
Re format a python string after splitting | 39,180,334 | <p>I have string like "week32_Aug_24_2016".
I want to change this string like "week32_2016_Aug_24"
I have tried this. </p>
<pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
newstr = wk[0]+" "+wk[3]+" "+wk[1]+" "+wk[2]
</code></pre>
<p>My expected output is "week32 2016 Aug 24".
I already got that but I want t... | 0 | 2016-08-27T10:57:03Z | 39,180,560 | <pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
i=0;
newstr="";
while(i<len(wk)):
newstr=newstr+wk[i]+" "
i=i+1
print newstr
</code></pre>
<p><strong>Something like that. If you want to keep last string in the middle it can be done.</strong></p>
| 0 | 2016-08-27T11:20:54Z | [
"python"
] |
Re format a python string after splitting | 39,180,334 | <p>I have string like "week32_Aug_24_2016".
I want to change this string like "week32_2016_Aug_24"
I have tried this. </p>
<pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
newstr = wk[0]+" "+wk[3]+" "+wk[1]+" "+wk[2]
</code></pre>
<p>My expected output is "week32 2016 Aug 24".
I already got that but I want t... | 0 | 2016-08-27T10:57:03Z | 39,180,655 | <pre><code>>>> import re
>>> string = "week32_Aug_24_2016"
>>> re.sub(r'_(.*)_(.*)_(.*)', r' \3 \1 \2', string)
'week32 2016 Aug 24'
</code></pre>
| 0 | 2016-08-27T11:32:20Z | [
"python"
] |
Re format a python string after splitting | 39,180,334 | <p>I have string like "week32_Aug_24_2016".
I want to change this string like "week32_2016_Aug_24"
I have tried this. </p>
<pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
newstr = wk[0]+" "+wk[3]+" "+wk[1]+" "+wk[2]
</code></pre>
<p>My expected output is "week32 2016 Aug 24".
I already got that but I want t... | 0 | 2016-08-27T10:57:03Z | 39,180,680 | <p>You can make use str.split() and format() as well:</p>
<pre><code>str = "week32_Aug_24_2016"
wk = str.split('_')
newstr = "{} {} {} {}".format(wk[0], wk[3], wk[1], wk[2])
</code></pre>
| 0 | 2016-08-27T11:35:01Z | [
"python"
] |
Storm missing resources folder when deploying JAR topology | 39,180,503 | <p>I'm trying to deploy a topology that uses a MultiLang Bolt (written in Python):</p>
<pre><code>builder.setBolt("avro-parser", new AvroBolt(), 3).shuffleGrouping("main-kafka-spout");
builder.setBolt("nlp-analyzer", new NLPBolt("/python/analyzer/audio_parser.py"), 2).shuffleGrouping("avro-parser");
</code></pre>
<p>... | 1 | 2016-08-27T11:15:31Z | 39,184,888 | <p>So, this is basically what I did to get it working:</p>
<ol>
<li>Create folder ${basedir}/multilang/resources --> copy python code inside.</li>
<li>Remove python code from ${basedir}/src/main/resources and leave only the Avro schemes.</li>
<li>Add to the build.sbt file:</li>
</ol>
<blockquote>
<p>unmanagedResour... | 1 | 2016-08-27T19:23:08Z | [
"java",
"python",
"sbt",
"apache-storm"
] |
Textblob module in python is not working for me | 39,180,551 | <p>Here is the code...</p>
<pre><code>import textblob
While True:
print("Ok...")
print("Enter the text....")
text = input()
blob = textblob.TextBlob(text)
blob.translate(to = "de")
</code></pre>
<p>It ask for text and then tells me Nothing. Any help is appreciated! </p>
| -1 | 2016-08-27T11:20:05Z | 39,181,558 | <p>Here's a working example:</p>
<pre><code>import textblob
while True:
text = input("Which text you want to translate:")
blob = textblob.TextBlob(text)
print("--> {0}".format(blob.translate(to = "de")))
</code></pre>
<p>You forgot to print the German translated string</p>
| 1 | 2016-08-27T13:16:00Z | [
"python"
] |
How to display parent table columns in django template | 39,180,566 | <p>I have two models in django as below:</p>
<pre><code>class Directorates(models.Model):
entrydate = models.DateTimeField(auto_now=True)
directoratename = models.CharField("Directorate", max_length=1000)
note = models.CharField("Note", max_length=2000, null=True)
insertedby = models.IntegerField(null=False)
... | 0 | 2016-08-27T11:21:34Z | 39,181,113 | <p>You're making things harder for yourself by using a <code>values()</code> query. Just pass the objects themselves:</p>
<pre><code>departments = Departments.objects.filter(deletedby=0)
</code></pre>
<p>and now you can do:</p>
<pre><code>{% for d in data %}
<tr>
<td>{{ d.departmentname }}</td&g... | 0 | 2016-08-27T12:24:05Z | [
"python",
"django",
"django-models",
"django-forms",
"django-templates"
] |
SQLAlchemy Build selectable query with multiple tables | 39,180,608 | <p>I created a materialized view for my flask web application with the help of
<a href="http://www.jeffwidman.com/blog/847/using-sqlalchemy-to-create-and-manage-postgresql-materialized-views/" rel="nofollow">Jeff Widman</a>.</p>
<p>Unfortunately he only describe how to join two tables. I would like to create a materia... | 2 | 2016-08-27T11:26:47Z | 39,182,008 | <p>Just add another join</p>
<pre><code>select_from(db.join(Table1, Table2, isouter=True).join(Table3, isouter=True))
</code></pre>
| 1 | 2016-08-27T14:04:06Z | [
"python",
"sqlalchemy",
"flask-sqlalchemy"
] |
ImportError: No module named 'cryptography' | 39,180,609 | <p>I installed python 3.4 on windows 7 and when trying to use paramiko I get this error :</p>
<pre><code>import paramiko
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\__init__.py", line 30, in module
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\transport.py", line 32,... | 1 | 2016-08-27T11:26:48Z | 39,180,737 | <p>It's not <a href="https://pypi.python.org/pypi/pycrypto" rel="nofollow">pycrypto</a> the package you need in order to import paramiko, try this:</p>
<blockquote>
<p>pip install <a href="https://pypi.python.org/pypi/paramiko/" rel="nofollow">paramiko</a></p>
</blockquote>
| 2 | 2016-08-27T11:41:22Z | [
"python",
"windows",
"paramiko"
] |
ImportError: No module named 'cryptography' | 39,180,609 | <p>I installed python 3.4 on windows 7 and when trying to use paramiko I get this error :</p>
<pre><code>import paramiko
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\__init__.py", line 30, in module
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\transport.py", line 32,... | 1 | 2016-08-27T11:26:48Z | 39,180,780 | <p>You need to install the <a href="https://pypi.python.org/pypi/cryptography" rel="nofollow">cryptography module</a>.</p>
<p>Normally, dependencies would've automatically got pulled in when you install paramiko using a package manager like pip. How did you install paramiko? Are you installing manually? </p>
| 0 | 2016-08-27T11:46:03Z | [
"python",
"windows",
"paramiko"
] |
ImportError: No module named 'cryptography' | 39,180,609 | <p>I installed python 3.4 on windows 7 and when trying to use paramiko I get this error :</p>
<pre><code>import paramiko
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\__init__.py", line 30, in module
File "C:\Python34\lib\site-packages\paramiko-2.0.2-py3.4.egg\paramiko\transport.py", line 32,... | 1 | 2016-08-27T11:26:48Z | 39,194,068 | <p>It turned out that it was a proxy problem.
It was blocking download.
I did </p>
<pre><code>pip install cryptography
pip install paramiko
</code></pre>
<p>from a direct internet connection and it worked.
Thanks everyone !</p>
| 0 | 2016-08-28T17:38:42Z | [
"python",
"windows",
"paramiko"
] |
Loop through array stops increasing index (Orig: Message widget text randomly not refreshing) | 39,180,689 | <p>I have an automatically generated report in txt file that gets update every 5 or so seconds and looks like this:</p>
<pre><code>Report Data Start Time:;00:00 25/08/2016Report;Va1;Val2;Val3;Val4;Val5;Val6;Val7
X;6;4;0;0;32;3;0.8125
Y;2;1;0;0;0;0;0
Z;5;1;0;0;0;0;0
[empty last line]
</code></pre>
<p>In tkinter, I cre... | 0 | 2016-08-27T11:35:58Z | 39,186,132 | <p>I believe your problem lies in the incorrect use of the <code>for</code> loop, specifically</p>
<pre><code>for sSkItem in SkItems:
iSkCol = SkItems.index(sSkItem)+1
</code></pre>
<p>Will give you index of <em>first occurence</em> of <code>sSkItem</code> in <code>SkItems</code> and NOT the index of current item... | 0 | 2016-08-27T21:59:55Z | [
"python",
"tkinter",
"widget",
"refresh"
] |
speech_recognition module stuck in "say something" - python | 39,180,695 | <p>I am trying a python script for speech recognition, i have installed the required pyaudio and SpeechRecognition modules in my enivronment.</p>
<p>The program was running fine till yesterday, but now it is stuck in "say something". Below is my code.</p>
<pre><code>import speech_recognition as sr
print "say somethin... | 1 | 2016-08-27T11:36:53Z | 39,189,620 | <p>I have had the same problem with me, i ended up installing jack2d and pulseaudio and what not.</p>
<p>That was the problem, I then uninstalled the jack2d by running </p>
<pre><code>sudo apt-get remove --auto-remove jack
</code></pre>
<p>Then restarted the system, and then ran </p>
<pre><code>jack_control stop
... | 0 | 2016-08-28T09:05:55Z | [
"python",
"python-2.7",
"speech-recognition"
] |
speech_recognition module stuck in "say something" - python | 39,180,695 | <p>I am trying a python script for speech recognition, i have installed the required pyaudio and SpeechRecognition modules in my enivronment.</p>
<p>The program was running fine till yesterday, but now it is stuck in "say something". Below is my code.</p>
<pre><code>import speech_recognition as sr
print "say somethin... | 1 | 2016-08-27T11:36:53Z | 39,231,994 | <p>When I tried your code as it is I got following <code>attribute</code> error.</p>
<pre><code>AttributeError: 'Recognizer' object has no attribute 'recognize'
</code></pre>
<p>Upon going through <a href="https://pypi.python.org/pypi/SpeechRecognition/" rel="nofollow">documentation</a> it looks like the <code>Recog... | 2 | 2016-08-30T15:47:22Z | [
"python",
"python-2.7",
"speech-recognition"
] |
Product of two equals numpy arrays are different | 39,180,779 | <p>I'm facing very strange problem with arrays in python and numpy. First of all what Im trying to archive is : </p>
<p>1) Get an MxN matrix from KxTxN matrix
2) Transpose this matrix and calculate product of this transposed matrix and the original one</p>
<p>What I get is some what strange, here comes the code : </... | 0 | 2016-08-27T11:45:50Z | 39,181,052 | <p>As @Aguy said, your problem comes from the data-type of your array. The dot product of a uint8 array with an other uint8 array gives an array that is also uint8 hence the data-type is overflowed in your case. Here's an example that shows the effect of overflow on your values:</p>
<pre><code>import numpy as np
a = ... | 3 | 2016-08-27T12:17:14Z | [
"python",
"arrays",
"numpy"
] |
python: mutually exclusive positional arguments | 39,180,785 | <p>I want my program to accept mutually exclusive positional arguments, <em>and</em> the usage to be displayed as a group of arguments.<br>
Currently I could only achieve one or the other, but not both... </p>
<p>This is what I currently have: </p>
<pre><code>def parse_arguments():
arg_parser = argparse.Argumen... | 3 | 2016-08-27T11:46:24Z | 39,183,029 | <p>In the first scenario, you could give <code>-p</code> choices</p>
<pre><code>build_parser.add_argument('-p', '--project',
action = 'store', # default
required = True,
choices = ['project_A','project_B','project_C'],
# type = project_name, # doesn't ma... | 0 | 2016-08-27T15:58:01Z | [
"python",
"argparse"
] |
What's the use of "flag" in pandas | 39,180,793 | <p>When i was training with an exercise for predictive modeling, I couldn't understand the use of flags. I googled it but I couldn't find the best explanation.</p>
<pre><code>train = pd.read_csv('C:/Users/Analytics Vidhya/Desktop/challenge/Train.csv')
test = pd.read_csv('C:/Users/Analytics Vidhya/Desktop/challenge/Tes... | 1 | 2016-08-27T11:47:36Z | 39,181,128 | <p>I guess it's easier and faster to show it as an example:</p>
<pre><code>In [102]: train = pd.DataFrame(np.random.randint(0, 5, (5, 3)), columns=list('abc'))
In [103]: test = pd.DataFrame(np.random.randint(0, 5, (3, 3)), columns=list('abc'))
In [104]: train
Out[104]:
a b c
0 3 4 0
1 0 0 1
2 2 4 1
3 ... | 2 | 2016-08-27T12:26:30Z | [
"python",
"pandas",
"flags"
] |
Pandas dataframe: ValueError: num must be 1 <= num <= 0, not 1 | 39,180,873 | <p>I am getting the following error while I am trying to plot a <code>pandas dataframe</code>:</p>
<blockquote>
<p>ValueError: num must be 1 <= num <= 0, not 1</p>
</blockquote>
<p>Code:</p>
<pre><code>import matplotlib.pyplot as plt
names = ['buying', 'maint', 'doors', 'persons', 'lug_boot', 'safety']
cust... | 1 | 2016-08-27T11:56:01Z | 39,181,446 | <p>So I'm pretty sure your issue is something to do with the format of the array train_x. I tried your program with an array of 10,000 rows and 6 cols and it worked fine so the issue is not size. For some reason, one of <code>len(x_train)</code> or <code>len(x_train[0])</code> is 0. What makes me think this is thus:</p... | 1 | 2016-08-27T13:01:30Z | [
"python",
"pandas",
"histogram"
] |
Python threading sync | 39,180,883 | <p>I have a base class that has an empty method called <code>Update</code>.
This <code>Update</code> method is inherited by X amount of different subclasses
The base class calls the <code>Update</code> method once every 30 ticks (right now it's not. It's just doing it in a loop right now, but I plan to make it get call... | 0 | 2016-08-27T11:57:38Z | 39,181,041 | <p>What you need is a <code>semaphore</code>, which is a multi-threaded lock object. <a href="https://en.wikipedia.org/wiki/Semaphore_(programming)" rel="nofollow">https://en.wikipedia.org/wiki/Semaphore_(programming)</a>.</p>
<p>You sometimes see the same principle in kindergarten or pre-schools where to go to the to... | 1 | 2016-08-27T12:16:25Z | [
"python",
"multithreading",
"class"
] |
ValueError: need more than 2 values to unpack | 39,181,014 | <p>I am doing this operation:</p>
<pre><code>for model, dict in fullCostDict.items():
if dict['cost_matrix']:
for i, (costDict, normalCostDict, normalCostDict1, normalCostDict2,normalCostDict3,normalCostDict4) in enumerate(
zip(dict['cost_matrix'], dict['normalised_matrix'],dic... | 0 | 2016-08-27T12:12:39Z | 39,181,068 | <p>You are missing a paranthesis in last <code>for</code> loop. Though you expect a <code>count</code> and a tuple of tuples, you are getting a bunch of tuple. So, the fix would be adding a pair of <code>()</code> over the tuples.</p>
<pre><code> for count, ((lb, cost),(lb1, cost1),(lb2, cost2),(lb3, co... | 1 | 2016-08-27T12:18:46Z | [
"python",
"loops",
"dictionary",
"zip",
"enumerate"
] |
Python print next line while printing from for loop | 39,181,088 | <p>I am performing a for loop on a list and would like to find a match and print the next line. However, when I try to use the next() method I keep getting a failure. Can I please get some help in extracting the next line after a specified match?</p>
<p>string (for loop output):</p>
<pre><code>item_0
0
item_1
0 ... | 0 | 2016-08-27T12:21:44Z | 39,181,121 | <p><code>line</code> is a <code>lxml.etree._ElementStringResult</code> (a modified <code>str</code>) in your code. <code>lxml.etree._ElementStringResults</code> do not have a <code>next</code> method which is why you are getting an <code>AttributeError</code>. </p>
<p>You can set a flag indicating that the next line s... | 2 | 2016-08-27T12:25:18Z | [
"python",
"match"
] |
Python print next line while printing from for loop | 39,181,088 | <p>I am performing a for loop on a list and would like to find a match and print the next line. However, when I try to use the next() method I keep getting a failure. Can I please get some help in extracting the next line after a specified match?</p>
<p>string (for loop output):</p>
<pre><code>item_0
0
item_1
0 ... | 0 | 2016-08-27T12:21:44Z | 39,181,151 | <p>Haven't tested this, but try:</p>
<pre><code>result = tree.xpath('//tr/td/font/text()')
iter_result = iter(result)
for line in iter_result:
if 'item_3' in line:
print(next(iter_result))
</code></pre>
| 1 | 2016-08-27T12:29:41Z | [
"python",
"match"
] |
Changing variable on another module for functions | 39,181,091 | <p>I have made two py files, in which <strong>main.py</strong> contains:</p>
<pre><code>import module
module.Print("This should not appear.")
module.Silence = False
module.Print("This should appear.")
</code></pre>
<p>The module imported is <strong>module.py</strong> which contains:</p>
<pre><code>Silence = True
... | 0 | 2016-08-27T12:21:55Z | 39,181,210 | <p>The issue is that you've defined your <code>Print</code> function with a default argument of True (since <code>Silent == True</code> when this module is imported, and the function created). Changing the module variable, <code>Silent</code> to False later isn't going to affect this function definition in any way. I... | 1 | 2016-08-27T12:36:03Z | [
"python",
"python-3.x",
"variables",
"import"
] |
Changing variable on another module for functions | 39,181,091 | <p>I have made two py files, in which <strong>main.py</strong> contains:</p>
<pre><code>import module
module.Print("This should not appear.")
module.Silence = False
module.Print("This should appear.")
</code></pre>
<p>The module imported is <strong>module.py</strong> which contains:</p>
<pre><code>Silence = True
... | 0 | 2016-08-27T12:21:55Z | 39,192,340 | <p>I think you are looking for a function with a default setting that can be dynamically changed. This will use the global <code>Silence</code> only if the <code>sil</code> argument is omitted in <code>Print()</code> function call.</p>
<pre><code>def Print(input, sil=None):
if sil is None:
sil = Silence
... | 0 | 2016-08-28T14:32:20Z | [
"python",
"python-3.x",
"variables",
"import"
] |
Do locally set Cython compiler directives affect one or all functions? | 39,181,180 | <p>I am working on speeding up some Python/Numpy code with Cython, and am a bit unclear on the effects of "locally" setting (as defined <a href="http://docs.cython.org/en/latest/src/reference//compilation.html" rel="nofollow">here</a> in the docs) compiler directives. In my case I'd like to use:</p>
<pre><code>@cython... | 2 | 2016-08-27T12:32:44Z | 39,181,291 | <p>The manual does not say explicitly, but these directives are using <a href="https://www.python.org/dev/peps/pep-0318/" rel="nofollow">decorator notation</a>. In plain Python,</p>
<pre><code>@decorator2
@decorator1
def fn(args):
body
</code></pre>
<p>is syntactic sugar for</p>
<pre><code>def fn(args):
bod... | 1 | 2016-08-27T12:43:41Z | [
"python",
"numpy",
"cython"
] |
Do locally set Cython compiler directives affect one or all functions? | 39,181,180 | <p>I am working on speeding up some Python/Numpy code with Cython, and am a bit unclear on the effects of "locally" setting (as defined <a href="http://docs.cython.org/en/latest/src/reference//compilation.html" rel="nofollow">here</a> in the docs) compiler directives. In my case I'd like to use:</p>
<pre><code>@cython... | 2 | 2016-08-27T12:32:44Z | 39,183,975 | <p>The <a href="http://cython.readthedocs.io/en/latest/src/reference/compilation.html#globally" rel="nofollow">documentation</a> states that if you want to set a compiler directive globally, you need to do so with a comment at the top of the file. eg.</p>
<pre><code>#!python
#cython: language_level=3, boundscheck=Fals... | 2 | 2016-08-27T17:38:33Z | [
"python",
"numpy",
"cython"
] |
Attempt to call an undefined function glutInit | 39,181,192 | <p>I need a glut window in python.
I have the following exception using Python 3.5 and PyOpenGL.GLUT</p>
<pre><code>Traceback (most recent call last):
File "D:\...\Test.py", line 47, in <module>
if __name__ == '__main__': main()
File "D:\...\Test.py", line 9, in main
glutInit(sys.argv)
File "C:\..... | 0 | 2016-08-27T12:34:12Z | 39,181,193 | <p><strong>Problems:</strong></p>
<ul>
<li>There was no problem with <code>pip install</code> or <code>easy_install</code></li>
<li>The <code>glut.dll</code> and <code>glut32.dll</code> were missing. (They are not part of the PyPI package) you have to install them separately or <a href="ftp://ftp.sgi.com/opengl/glut/g... | 0 | 2016-08-27T12:34:12Z | [
"python",
"python-3.x",
"glut",
"pyopengl"
] |
Flask-Migrate having issue with enum class in models | 39,181,294 | <p>Using flask-migrate before I was able to create enums by using flask-sqlalchemy's db.Enum and entering the values in as strings like so.</p>
<pre><code>reservation_status = db.Enum('pending', 'confirmed, name='reservation_status_enum')
</code></pre>
<p>I decided to start using enum classes like the following. Acco... | 1 | 2016-08-27T12:43:53Z | 39,181,900 | <p>Thanks to user @dim, I was able to resolve the issue by upgrading just sqlalchemy to beta 1.1.0b3. As is most cases, it was user error(me).</p>
<p>All i did was </p>
<pre><code>pip uninstall sqlalchemy
pip install sqlalchemy==1.1.0b3
</code></pre>
| 1 | 2016-08-27T13:52:52Z | [
"python",
"flask",
"enums",
"sqlalchemy",
"alembic"
] |
Using `map` to write lines to files | 39,181,323 | <p>I have a list of lines:</p>
<pre><code>lines = [a,b,c,d]
</code></pre>
<p>And a list of files (created via <code>open(path string,'w')</code>:</p>
<pre><code>files = [e,f,g,h]
</code></pre>
<p>What I am trying to do is write each line to its respective file (line <code>a</code> should go with file <code>e</code>... | 0 | 2016-08-27T12:47:57Z | 39,181,344 | <p>Did you mean to do:</p>
<pre><code>map(lambda (x,y): y.write(x + "\n"), zip(lines,files))
</code></pre>
<p>But I'd rather do it as:</p>
<pre><code>for l, f in zip(lines,files):
f.write(l + "\n")
</code></pre>
| 4 | 2016-08-27T12:50:15Z | [
"python",
"python-2.7",
"function",
"dictionary",
"lambda"
] |
How do I change a value of a variable using an if else statement? | 39,181,330 | <p>I've been on it for days but nothing is helping. The value of smallest does not change no matter what i do. it does not happen with the value of largest although it uses almost the same line of code.</p>
<pre><code>smallest = None
largest = None
while True:
num = raw_input("Enter a number: ")
if num == "don... | 0 | 2016-08-27T12:48:23Z | 39,181,381 | <p>The problem is that you are, in both cases, comparing numbers to <code>None</code> in the first iteration. In Python 2, every number will come out as "greater" when compared to <code>None</code>, thus the code works for finding the maximum, but fails for finding the minimum.</p>
<p>BTW, in Python 3, the same would ... | 4 | 2016-08-27T12:54:49Z | [
"python",
"python-2.7",
"python-3.x"
] |
How do I change a value of a variable using an if else statement? | 39,181,330 | <p>I've been on it for days but nothing is helping. The value of smallest does not change no matter what i do. it does not happen with the value of largest although it uses almost the same line of code.</p>
<pre><code>smallest = None
largest = None
while True:
num = raw_input("Enter a number: ")
if num == "don... | 0 | 2016-08-27T12:48:23Z | 39,181,750 | <p>First, (almost) never use a bare <code>except</code> statement. You will catch exceptions you can't or don't want to handle (like <code>SystemExit</code>). At the very least, use <code>except Exception</code>.</p>
<p>Second, your <code>except</code> block implies you only want to handle the <code>ValueError</code> ... | 1 | 2016-08-27T13:37:10Z | [
"python",
"python-2.7",
"python-3.x"
] |
for-loop Python 3.5. Creating a quiz for students I tutor | 39,181,543 | <p>Hello I'm currently trying to make a quiz application for year english students. I'm using Python 3.5. and I'm kinda new. The quizz is supposed to work like below I'll include the code as well. </p>
<blockquote>
<p>WELCOME TO YOUR QUIZ</p>
<p>Word 1/5: Potato How many consanants does the word contain?</p>
... | 1 | 2016-08-27T13:14:22Z | 39,181,637 | <p>I'm proposing a way to select a question, and associate a test function, which allows to define as many questions you want easily:</p>
<pre><code>print('WELCOME TO YOUR QUIZ')
# Import the random module to allow us to select the word list and questions at random.
import random
quizWords = ['WOMBAT', 'COMPUTER', 'B... | 0 | 2016-08-27T13:25:01Z | [
"python",
"python-3.x",
"for-loop"
] |
for-loop Python 3.5. Creating a quiz for students I tutor | 39,181,543 | <p>Hello I'm currently trying to make a quiz application for year english students. I'm using Python 3.5. and I'm kinda new. The quizz is supposed to work like below I'll include the code as well. </p>
<blockquote>
<p>WELCOME TO YOUR QUIZ</p>
<p>Word 1/5: Potato How many consanants does the word contain?</p>
... | 1 | 2016-08-27T13:14:22Z | 39,181,680 | <p>Here's a possible solution:</p>
<pre><code># Import the random module to allow us to select the word list and
# questions at random.
import random
quizWords = [
'WOMBAT', 'COMPUTER', 'BOOKS', 'DAY', 'NIGHT', 'HOUR', 'POTATO', 'HUGE',
'TINY', 'GOOD', 'BAD', 'YES', 'NO', 'HOUSE', 'QUESTION', 'BALLOON',
'... | 0 | 2016-08-27T13:29:34Z | [
"python",
"python-3.x",
"for-loop"
] |
for-loop Python 3.5. Creating a quiz for students I tutor | 39,181,543 | <p>Hello I'm currently trying to make a quiz application for year english students. I'm using Python 3.5. and I'm kinda new. The quizz is supposed to work like below I'll include the code as well. </p>
<blockquote>
<p>WELCOME TO YOUR QUIZ</p>
<p>Word 1/5: Potato How many consanants does the word contain?</p>
... | 1 | 2016-08-27T13:14:22Z | 39,182,052 | <p>This is how I would go about creating a quiz. Obviously you can update the print statements to follow your own desired format. Hope that this helps!</p>
<pre><code>import random
import string
def consonant_count(word):
word = word.lower()
return len([x for x in word if x in consonants])
def vowel_count(wo... | 1 | 2016-08-27T14:09:42Z | [
"python",
"python-3.x",
"for-loop"
] |
'python' is not recognized as an internal or external command, operable program or batch file.Even though path is added | 39,181,560 | <p>I am on Windows 10, 64. </p>
<p>When I run python in cmd, I got the message:
'python' is not recognized as an internal or external command,
operable program or batch file.</p>
<p>Even though I have added C:\Python27 to the environment variables.
Please help </p>
| -2 | 2016-08-27T13:16:03Z | 39,181,598 | <p>:(
Turns out. I just need to restart the PC. </p>
| -1 | 2016-08-27T13:19:51Z | [
"python",
"windows",
"batch-file"
] |
'python' is not recognized as an internal or external command, operable program or batch file.Even though path is added | 39,181,560 | <p>I am on Windows 10, 64. </p>
<p>When I run python in cmd, I got the message:
'python' is not recognized as an internal or external command,
operable program or batch file.</p>
<p>Even though I have added C:\Python27 to the environment variables.
Please help </p>
| -2 | 2016-08-27T13:16:03Z | 39,181,625 | <p>You can add the python folder to the <code>PATH</code> environment variable but I would suggest to install <a href="https://bitbucket.org/vinay.sajip/pylauncher" rel="nofollow">the launcher</a> (see <a href="https://www.python.org/dev/peps/pep-0397/" rel="nofollow">PEP 397</a>) instead (it is the same one that is in... | 0 | 2016-08-27T13:23:39Z | [
"python",
"windows",
"batch-file"
] |
Find all n-dimensional lines and diagonals with NumPy | 39,181,600 | <p>Using NumPy, I would like to produce a list of all lines and diagonals of an n-dimensional array with lengths of k.</p>
<hr>
<p>Take the case of the following three-dimensional array with lengths of three.</p>
<pre><code>array([[[ 0, 1, 2],
[ 3, 4, 5],
[ 6, 7, 8]],
[[ 9, 10, 11],
... | 11 | 2016-08-27T13:20:07Z | 39,183,487 | <pre><code>In [1]: x=np.arange(27).reshape(3,3,3)
</code></pre>
<p>Selecting individual <code>rows</code> is easy:</p>
<pre><code>In [2]: x[0,0,:]
Out[2]: array([0, 1, 2])
In [3]: x[0,:,0]
Out[3]: array([0, 3, 6])
In [4]: x[:,0,0]
Out[4]: array([ 0, 9, 18])
</code></pre>
<p>You could iterate over dimensions with an... | 3 | 2016-08-27T16:45:38Z | [
"python",
"arrays",
"numpy",
"diagonal",
"n-dimensional"
] |
Find all n-dimensional lines and diagonals with NumPy | 39,181,600 | <p>Using NumPy, I would like to produce a list of all lines and diagonals of an n-dimensional array with lengths of k.</p>
<hr>
<p>Take the case of the following three-dimensional array with lengths of three.</p>
<pre><code>array([[[ 0, 1, 2],
[ 3, 4, 5],
[ 6, 7, 8]],
[[ 9, 10, 11],
... | 11 | 2016-08-27T13:20:07Z | 39,185,702 | <p><strong>This solution generalized over <code>n</code></strong></p>
<p>Lets rephrase this problem as "find the list of indices".</p>
<p>We're looking for all of the 2d index arrays of the form</p>
<pre><code>array[i[0], i[1], i[2], ..., i[n-1]]
</code></pre>
<p>Let <code>n = arr.ndim</code></p>
<p>Where <code>i<... | 5 | 2016-08-27T20:59:01Z | [
"python",
"arrays",
"numpy",
"diagonal",
"n-dimensional"
] |
Find all n-dimensional lines and diagonals with NumPy | 39,181,600 | <p>Using NumPy, I would like to produce a list of all lines and diagonals of an n-dimensional array with lengths of k.</p>
<hr>
<p>Take the case of the following three-dimensional array with lengths of three.</p>
<pre><code>array([[[ 0, 1, 2],
[ 3, 4, 5],
[ 6, 7, 8]],
[[ 9, 10, 11],
... | 11 | 2016-08-27T13:20:07Z | 39,185,743 | <p>np.einsum can be used to build all these kind of expressions; for instance:</p>
<pre><code># 3d diagonals
print(np.einsum('iii->i', a))
# 2d diagonals
print(np.einsum('iij->ij', a))
print(np.einsum('iji->ij', a))
</code></pre>
| 2 | 2016-08-27T21:04:54Z | [
"python",
"arrays",
"numpy",
"diagonal",
"n-dimensional"
] |
how to iterate over files in neighbouring dir | 39,181,647 | <p>I have a project structure like this</p>
<pre><code>test/foo.py
test/bar (directory with 10 files)
src/
README.MD
</code></pre>
<p>From <code>foo.py</code> (which is in <code>test</code> dir), I wish to iterate over the 10 files in the <code>bar</code> dir (which is also in <code>test</code> dir). I tried to do th... | 0 | 2016-08-27T13:25:55Z | 39,181,765 | <p>Use functions in <code>os.path</code> to do this (works only from a script, not REPL):</p>
<pre><code>import os
# retrieve path to directory with script
script_dir = os.path.dirname(os.path.realpath(__file__))
bar_dir = os.path.join(script_dir, 'bar')
for f in os.listdir(bar_dir):
print(f)
</code></pre>
| 1 | 2016-08-27T13:38:43Z | [
"python"
] |
Sometimes request.session.session_key is None | 39,181,655 | <p>I hit a problem when get session_key from <code>request.session</code>.</p>
<p>I am using Django1.8 and Python2.7.10 to set up a RESTful service.</p>
<p>Here is snippet of my login view:</p>
<pre><code>user = authenticate(username=userName, password=passWord)
if user is not None:
# the password verified for t... | 0 | 2016-08-27T13:27:04Z | 39,188,274 | <p>According to John's suggestion.</p>
<p>I fixed the problem by this snippet:</p>
<pre><code>if not request.session.session_key:
request.session.save()
session_id = request.session.session_key
</code></pre>
| 0 | 2016-08-28T05:24:33Z | [
"python",
"django",
"session",
"django-sessions"
] |
Django : how to pass event.id/package.id in a template | 39,181,669 | <p>I have three jobs to be done
1) Read Packages related to an event
2) Update Packages related to that event one by one.
3) Or delete the same package related to that event.
I have my views.py like this : </p>
<pre><code>@login_required
def update_package(request, pk ):
package = Packages.objects.get(pk = pk... | 0 | 2016-08-27T13:28:05Z | 39,181,925 | <p>You need to add an <code>id</code> argument to your <code>update_package</code> and <code>delete_package</code> views.</p>
<pre><code>def update_package(request, id, pk):
def delete_package(request, id, pk):
</code></pre>
<p>These arguments must match the ones you have on your urls.</p>
<p>Your <code>delete_packa... | 0 | 2016-08-27T13:54:45Z | [
"python",
"django",
"django-templates",
"django-views"
] |
can I use Numpy genfromtxt to get names then skip a specifc row before continuing? | 39,181,748 | <p>I have a series of large CSV files contain sensor data samples.</p>
<p>The format of each file is</p>
<pre><code>Row 0 Column names
Row 1 Column unit of measurement.
Row 2 to EOF: time-stamp of sample was taken,voltage measurement from all sensors.....
</code></pre>
<p>I cannot modify the original file</p>
<p>... | 1 | 2016-08-27T13:37:01Z | 39,183,110 | <p>I can see several options:</p>
<ul>
<li><p>Open the file to read just the header line, parse the names yourself; run <code>genfromtxt</code> with the custom names and skip_header</p></li>
<li><p>trick <code>genfromtxt</code> into treating the 2nd line as a comment line</p></li>
<li><p>open the file yourself; pass l... | 0 | 2016-08-27T16:06:02Z | [
"python",
"numpy"
] |
Using Python libraries in Racket | 39,181,788 | <p>Can I use Python code and libraries in Racket? I have installed PyonR (<a href="https://github.com/pedropramos/PyonR" rel="nofollow">https://github.com/pedropramos/PyonR</a>) in DrRacket so I can choose "#lang python" and run Python code. But how can I combine Racket and Python language codes for my application?</p... | 2 | 2016-08-27T13:41:23Z | 39,186,289 | <p><a href="https://github.com/pedropramos/PyonR" rel="nofollow">Accoring to the readme</a> you can import python 2.7 packages, but you need to use <code>cpyimport</code>. One of the examples looks like this:</p>
<pre><code>#lang python
cpyimport numpy as np
from "racket" import time
def add_arrays(n):
re... | 3 | 2016-08-27T22:19:16Z | [
"python",
"racket",
"ffi"
] |
Using Python libraries in Racket | 39,181,788 | <p>Can I use Python code and libraries in Racket? I have installed PyonR (<a href="https://github.com/pedropramos/PyonR" rel="nofollow">https://github.com/pedropramos/PyonR</a>) in DrRacket so I can choose "#lang python" and run Python code. But how can I combine Racket and Python language codes for my application?</p... | 2 | 2016-08-27T13:41:23Z | 39,194,018 | <p>The PyonR project is the closest ready-to-use way of using Python libraries from Racket that I know of. However note that there is a difference between Python libraries written in Python and Python libraries that are a thin Python layer on top of a C library. As you have experienced the latter type is not working (t... | 2 | 2016-08-28T17:33:33Z | [
"python",
"racket",
"ffi"
] |
Remove u' in json list | 39,181,791 | <p>I have a python script that queries servers that comes back with a set of information.
Which i need to put into a database which is used by a php website. How ever there is a specific field that i get returned the <code>description</code> field which is user input and in some cases a few ASCII characters are used b... | 0 | 2016-08-27T13:41:45Z | 39,181,874 | <p>If <code>status.description</code> is returning a dict and you want it to be JSON, you should call <code>json.dumps()</code> on it, not <code>unicode()</code>.</p>
<p>However, the presence of <code>u</code> characters in a dict is <em>not</em> a problem and does not need to be fixed.</p>
| 2 | 2016-08-27T13:49:18Z | [
"php",
"python",
"database",
"encoding",
"user-input"
] |
Remove u' in json list | 39,181,791 | <p>I have a python script that queries servers that comes back with a set of information.
Which i need to put into a database which is used by a php website. How ever there is a specific field that i get returned the <code>description</code> field which is user input and in some cases a few ASCII characters are used b... | 0 | 2016-08-27T13:41:45Z | 39,181,899 | <p><code>print(some_dict)</code> print string representation of a dict object. You need to convert dict object to a JSON.</p>
<pre><code>import json
print(json.dumps(some_dict))
</code></pre>
| 0 | 2016-08-27T13:52:51Z | [
"php",
"python",
"database",
"encoding",
"user-input"
] |
Spark job aborted | 39,181,884 | <p>I would like to add a prediction column to my dataframe given the logistic regression model. The function is below:</p>
<pre><code>def add_probability(df, model):
coefficients_broadcast = sc.broadcast(model.coefficients)
intercept = model.intercept
def get_p(features):
# Compute the raw value
raw... | -1 | 2016-08-27T13:50:25Z | 39,185,927 | <p>You will absolutely love the reason why it fails:</p>
<pre><code>return (1+exp(-raw_prediction))^(-1)
</code></pre>
<p>should be</p>
<pre><code>return (1+exp(-raw_prediction))**(-1)
</code></pre>
<p>Glad I could help</p>
| 0 | 2016-08-27T21:31:45Z | [
"python",
"apache-spark"
] |
Keras Convolutional Autoencoder: Layer Shapes | 39,181,976 | <p>I've got a list of about 70,000 training images, each shaped (no. of colour channels, height width) = (3, 30, 30), and about 20,000 testing images. My convolutional autoencoder is defined as:</p>
<pre><code> # Same as the code above, but with some params changed
# Now let's define the model.
# Set input dimension... | 1 | 2016-08-27T14:00:52Z | 39,551,007 | <p>You forgot to add border_mode='same' in the last convnet layer of the decoder . </p>
| 0 | 2016-09-17T19:42:49Z | [
"python",
"autoencoder"
] |
Urwid colored Text simplified | 39,182,074 | <p>This is my broken code (technically works but doesn't change color)</p>
<pre><code>import urwid
txt = urwid.AttrMap(urwid.Text(u"Hello World"), 'dark blue')
fill = urwid.Filler(txt, 'top')
loop = urwid.MainLoop(fill)
loop.run()
</code></pre>
<p>Honestly all I want to do is change the color of the text, it seems so... | 0 | 2016-08-27T14:11:33Z | 39,182,318 | <p>From the <a href="http://urwid.org/reference/widget.html#text" rel="nofollow">manual</a>, there is no argument for color:</p>
<blockquote>
<p>class urwid.Text(markup, align='left', wrap='space', layout=None)</p>
</blockquote>
<p>You have to define a pallet, example:</p>
<pre><code>import urwid
palette = [("tex... | 0 | 2016-08-27T14:39:51Z | [
"python",
"python-2.7"
] |
Subplots mess with my plot | 39,182,249 | <p>I have the following plot function that saves a random walk input <em>(the random walk is supposed to mimic a stock and bond portfolio that rebalances between each other given specific inputs, the exposure is supposed to show the exposure to the stock portfolio)</em>: </p>
<pre><code>def stock_save_img_run(k):
... | 0 | 2016-08-27T14:32:12Z | 39,183,501 | <p>Obtaining handles over separate <a href="http://matplotlib.org/api/axes_api.html" rel="nofollow">Axes</a> instances might be a step in a helpful direction:</p>
<pre><code>def stock_save_img_run(k):
stock_vals = pd.read_csv('stock_vals_run_' + str(k) + '.csv', sep=';', encoding='utf-8-sig')
fig, (top_axes, b... | 2 | 2016-08-27T16:47:55Z | [
"python",
"matplotlib",
"stacked-area-chart"
] |
How to delay a python program in progress through another python code (in Raspberry Pi) | 39,182,251 | <p>I want to know how to delay and execute a python program in progress in Raspberry Pi through another python code. For example, I have a python file named example.py which contains GPIO commands and the python file is in progress. But I want the GPIO process to be delayed or stop, so I want a python file named delay.... | 1 | 2016-08-27T14:32:28Z | 39,183,322 | <p>Every python script run on python.exe process. Just find the process name(it's better to find PID) that you want to pause or stop and by using system library you can stop that. But here is a link which solve your problem in Pi:</p>
<p><a href="http://Every%20python%20script%20run%20on%20python.exe%20process.%20Jus... | 0 | 2016-08-27T16:28:46Z | [
"python",
"process",
"raspberry-pi"
] |
How to set a class attribute a specified number of times in Python | 39,182,321 | <p>Suppose we have a class <code>Node</code> which is initialized as follows:</p>
<pre><code>class Node(object):
def __init__(self, data=None, next_node=None, prev_node = None):
self.data = data
self.next = next_node
self.prev = prev_node
</code></pre>
<p>and we create an instance <code>he... | 0 | 2016-08-27T14:40:04Z | 39,182,432 | <blockquote>
<p>It seems like the next_n_times method works as a 'getter', but not as a 'setter'. How can I make it work as a 'setter'?</p>
</blockquote>
<p>What you get back is a <code>Node</code> object, and you want to set its <code>next</code> attribute: </p>
<pre><code>head.next_n_times(3).next = Node(data=8)
... | 1 | 2016-08-27T14:52:07Z | [
"python"
] |
How to set a class attribute a specified number of times in Python | 39,182,321 | <p>Suppose we have a class <code>Node</code> which is initialized as follows:</p>
<pre><code>class Node(object):
def __init__(self, data=None, next_node=None, prev_node = None):
self.data = data
self.next = next_node
self.prev = prev_node
</code></pre>
<p>and we create an instance <code>he... | 0 | 2016-08-27T14:40:04Z | 39,182,492 | <p>You're trying to implement the append method for the Node class. You can easily do so with recursion:</p>
<pre><code>class Node(object):
def __init__(self, data=None, next_node=None, prev_node = None):
self.data = data
self.next = next_node
self.prev = prev_node
def append(self, nod... | 2 | 2016-08-27T14:59:06Z | [
"python"
] |
How to set a class attribute a specified number of times in Python | 39,182,321 | <p>Suppose we have a class <code>Node</code> which is initialized as follows:</p>
<pre><code>class Node(object):
def __init__(self, data=None, next_node=None, prev_node = None):
self.data = data
self.next = next_node
self.prev = prev_node
</code></pre>
<p>and we create an instance <code>he... | 0 | 2016-08-27T14:40:04Z | 39,182,500 | <p>Try this</p>
<pre><code>class Node(object):
def __init__(self, data=None, next_node=None, prev_node = None):
self.data = data
self.next = next_node
self.prev = prev_node
def next_n_times(self, n, value):
next_node = self.next
# loop to the penultimate Node
fo... | 0 | 2016-08-27T15:00:10Z | [
"python"
] |
Indexing Matrix in TensorFlow | 39,182,337 | <p>For example, in Numpy I can get some values like this. </p>
<pre><code>d = np.array([[0, 1, 2], [3, 4, 5], [6, 7, 8]])
# array([[0, 1, 2],
# [3, 4, 5],
# [6, 7, 8]])
d[[0, 1, 2], [2, 1, 0]]
# array([2, 4, 6])
</code></pre>
<p>So I can retrieve [2, 4, 6]. </p>
<p>how can I do the same thing in Tenso... | 0 | 2016-08-27T14:41:29Z | 39,182,415 | <p>One solution I found is to use gather_nd function. </p>
<pre><code>sess.run([tf.gather_nd(x, [[0, 2], [1, 1], [2, 0]])])
# [3 5 7]
</code></pre>
<p>Is there any other functions? a function more similar to Numpy in TensorFlow?</p>
| 0 | 2016-08-27T14:49:45Z | [
"python",
"numpy",
"neural-network",
"tensorflow"
] |
Pygame Freezes on Exit/Quit | 39,182,385 | <p>I have done research about this problem, on internet, but there was no solution for my case... The window freezes when i try to close it with (X) button.
And as I said I haven't came across any solution on other posts, so I came here to ask for help. Thank you.</p>
<pre><code>#!/usr/bin/python
import sys
import pyg... | 1 | 2016-08-27T14:46:44Z | 39,182,491 | <p>Your code work perfectly well on my platform.
My platform:
Scientific Linux 7 (RHEL 7)
Python: 3.4.3
Pygame Version: 1.9.2b8
Window Manager: Gnome3</p>
<p>There is also probably bug in your code.
The "/img/bg_img.png" suggest absolute path, it possible, but very uncommon :).</p>
| 0 | 2016-08-27T14:58:59Z | [
"python",
"pygame"
] |
Pygame Freezes on Exit/Quit | 39,182,385 | <p>I have done research about this problem, on internet, but there was no solution for my case... The window freezes when i try to close it with (X) button.
And as I said I haven't came across any solution on other posts, so I came here to ask for help. Thank you.</p>
<pre><code>#!/usr/bin/python
import sys
import pyg... | 1 | 2016-08-27T14:46:44Z | 39,182,504 | <p>Works pretty nicely for me. See the demo below:</p>
<p><a href="http://i.stack.imgur.com/0CsC8.gif" rel="nofollow"><img src="http://i.stack.imgur.com/0CsC8.gif" alt="enter image description here"></a></p>
| 0 | 2016-08-27T15:01:08Z | [
"python",
"pygame"
] |
Pygame Freezes on Exit/Quit | 39,182,385 | <p>I have done research about this problem, on internet, but there was no solution for my case... The window freezes when i try to close it with (X) button.
And as I said I haven't came across any solution on other posts, so I came here to ask for help. Thank you.</p>
<pre><code>#!/usr/bin/python
import sys
import pyg... | 1 | 2016-08-27T14:46:44Z | 39,182,635 | <p>Not only does your code work as expected on linux Mate 17, python 2.7.6 but it also works with <code>sys.exit()</code> instead of <code>pygame.quit()</code> or nothing at all i.e. no <code>sys.exit()</code> or <code>pygame.quit()</code></p>
| 0 | 2016-08-27T15:13:26Z | [
"python",
"pygame"
] |
Pygame Freezes on Exit/Quit | 39,182,385 | <p>I have done research about this problem, on internet, but there was no solution for my case... The window freezes when i try to close it with (X) button.
And as I said I haven't came across any solution on other posts, so I came here to ask for help. Thank you.</p>
<pre><code>#!/usr/bin/python
import sys
import pyg... | 1 | 2016-08-27T14:46:44Z | 39,182,681 | <p>So it turns out that the IDLE is what was causing the problem...
I tried to run the code from commandline and it worked perfectly!</p>
<p>The IDLE that I (was) using is called Wing101.</p>
| 0 | 2016-08-27T15:18:46Z | [
"python",
"pygame"
] |
tar files and download with flask app | 39,182,405 | <p>I have one tex file and three images and I want that the user can click a button and download all three of them. It would be ideal if the four files would be as one tar file. My download works as follows right now</p>
<pre><code>@app.route('/download_tex', methods=['GET', 'POST'])
@login_required
def download_tex()... | 1 | 2016-08-27T14:49:16Z | 39,183,457 | <p>You should use the <a href="http://flask.pocoo.org/docs/0.11/api/#flask.send_from_directory" rel="nofollow">send_from_directory</a> method that Flask provides for this =) It is the perfect use case for what you're doing.</p>
<p>What you can do is something like this:</p>
<pre><code>from flask import send_from_dire... | 1 | 2016-08-27T16:43:12Z | [
"python",
"flask"
] |
Catch Google Endpoint Response Error | 39,182,536 | <p>It's very hard to track Google Endpoints error, which raised at the time response:</p>
<pre><code>Encountered unexpected error from ProtoRPC method implementation: ValidationError (Message MatchCenterResponseMessage is missing required field sport) (/base/data/home/runtimes/python27/python27_lib/versions/third_part... | 0 | 2016-08-27T15:03:58Z | 39,183,235 | <p>You can use try except structure to catch the error. Also tracing may help you alot. </p>
<pre><code>try:
//your code
Except ValidationError:
raiseError
</code></pre>
| 0 | 2016-08-27T16:19:06Z | [
"python",
"google-app-engine",
"google-cloud-endpoints"
] |
Python Flask Login login_required redirecting | 39,182,650 | <p>I am working on a Flask app and using Flask-Login for authentication. Everything is set up and running. However when the user logins in and attempts to visit a page that requires login, they are redirected to the login page. </p>
<p>When watching the console, I get a 200 for the GET login page, a 200 for the POST o... | 2 | 2016-08-27T15:15:21Z | 39,307,130 | <p>So it turns out that when working with Peewee and Flask-Login, you need to let Peewee supply its default primary key for the User model instead of using a custom one. Removing <code>user_id = PrimaryKeyField()</code>, dropping the table, and restarting fixed it.</p>
| 0 | 2016-09-03T12:55:16Z | [
"python",
"flask",
"flask-login"
] |
Why if the id = '0' in "InlineQueryResultArticle" the element chosen doesn't trigger the "on_chosen_inline_result" code? | 39,182,676 | <p>I'm new to Python and new to Stack Overflow, sorry for my mistakes...</p>
<p>I'm using Telepot to write a bot for Telegram.<br>
When dealing with inline results I can only make the code in <code>on_chosen_inline_result</code> execute for every article I choose other than the first created.</p>
<pre><code>def on_in... | 2 | 2016-08-27T15:18:30Z | 39,188,148 | <p>From my own test, it seems your suspicion is correct. I have tried a variety of id strings and chosen each of them in turn:</p>
<ul>
<li><code>00</code> â Yes (<code>chosen_inline_result</code> gotten)</li>
<li><code>$0</code> â Yes</li>
<li><code>0</code> â No</li>
<li><code>1</code> â Yes</li>
</ul>
<p>A... | 1 | 2016-08-28T04:56:57Z | [
"python",
"telegram-bot"
] |
Solve for roots in given interval using scipy.optimize | 39,182,713 | <p>I have the function <code>f1 = lambda x: 1 - 1.12 * (x ** 0.5) * ((1-x) ** 0.02)</code>, and I wish to solve for its roots in the interval (0, 1). I have tried using the <code>scipy.optimize.brentq</code> and <code>scipy.optimize.fsolve</code> to do this, but both methods run into issues. Based on some experimentati... | 0 | 2016-08-27T15:23:07Z | 39,186,066 | <p>fsolve does not support root-finding on an interval. It likely wanders off to either x<0 or x>1, hence RuntimeWarning (once) and garbage for the answer. You can check it by instrumenting your function with print(x).</p>
<p>Brentq's behavior is undefined if the interval contains more then one root.</p>
<p>If you... | 2 | 2016-08-27T21:52:11Z | [
"python",
"optimization",
"scipy",
"polynomial-math"
] |
Solve for roots in given interval using scipy.optimize | 39,182,713 | <p>I have the function <code>f1 = lambda x: 1 - 1.12 * (x ** 0.5) * ((1-x) ** 0.02)</code>, and I wish to solve for its roots in the interval (0, 1). I have tried using the <code>scipy.optimize.brentq</code> and <code>scipy.optimize.fsolve</code> to do this, but both methods run into issues. Based on some experimentati... | 0 | 2016-08-27T15:23:07Z | 39,188,106 | <p>If you take the derivative of your function and set it equal to 0, after a little algebra you'll find that the derivative is 0 at x0 = 0.5/0.52. (In a calculus class, this point is called a <em>critical point</em>, not an inflection point.) The function has a minimum at this point, and the value there is negative.... | 2 | 2016-08-28T04:47:04Z | [
"python",
"optimization",
"scipy",
"polynomial-math"
] |
Solve for roots in given interval using scipy.optimize | 39,182,713 | <p>I have the function <code>f1 = lambda x: 1 - 1.12 * (x ** 0.5) * ((1-x) ** 0.02)</code>, and I wish to solve for its roots in the interval (0, 1). I have tried using the <code>scipy.optimize.brentq</code> and <code>scipy.optimize.fsolve</code> to do this, but both methods run into issues. Based on some experimentati... | 0 | 2016-08-27T15:23:07Z | 39,194,788 | <p>As you already know, a direct answer to part of your question is that fsolve doesn't find a root in the interval [0.97,0.98] because there's no root there. As for a systematic way, why not use <strong>plot</strong>?</p>
<p>Once you've defined the function as a <strong>lambda</strong>, ready for use with Brent or va... | 1 | 2016-08-28T19:01:47Z | [
"python",
"optimization",
"scipy",
"polynomial-math"
] |
Applying Decay Factor to Return Data in Pandas and Saving as New Variable | 39,182,747 | <p>I have return data for stocks (thousands of them but am only showing 4 here) as below:</p>
<pre><code>In[3]:ret
Out[3]:
Symbol AAPL DE IBM MSFT
Date
2016-01-19 NaN NaN NaN NaN
2016-01-20 -0.021780 -0.019701 -0.078557 ... | 1 | 2016-08-27T15:26:33Z | 39,183,014 | <p>Adding column row_index:</p>
<pre><code>In [229]: df['row_index'] = df.apply(lambda x: x.name, axis = 1)
In [230]: df
Out[230]:
Date AAPL DE IBM MSFT row_index
0 2016-01-19 NaN NaN NaN NaN 0
1 2016-01-20 -0.021780 -0.019701 -0.078557 -0.019177 ... | 1 | 2016-08-27T15:56:18Z | [
"python",
"pandas"
] |
Applying Decay Factor to Return Data in Pandas and Saving as New Variable | 39,182,747 | <p>I have return data for stocks (thousands of them but am only showing 4 here) as below:</p>
<pre><code>In[3]:ret
Out[3]:
Symbol AAPL DE IBM MSFT
Date
2016-01-19 NaN NaN NaN NaN
2016-01-20 -0.021780 -0.019701 -0.078557 ... | 1 | 2016-08-27T15:26:33Z | 39,184,540 | <p>Try This: </p>
<pre><code>df = df.set_index("Date")
retFac = np.fromfunction(lambda i,j : .97**(i), df.values.shape)[::-1]
df*retFac
df['ret_decay'] = retFac[:,0]
df
AAPL DE IBM MSFT ret_decay
Date
2016-01-19 NaN ... | 0 | 2016-08-27T18:41:10Z | [
"python",
"pandas"
] |
Moving Character in pygame Without Repeatedly Copying Image | 39,182,813 | <p>My character, like most characters, is supposed to be repeatedly replaced by the same image a few pixels over to simulate movement. Instead, my code causes the image to be copied when I move it, and right now it's more like a drawing application than a moving character. Can someone please tell me why this is happe... | 1 | 2016-08-27T15:33:27Z | 39,183,251 | <p>Before you enter the main loop, add a statement like</p>
<pre><code>background = pygame.Surface(DISPLAYSURF.get_size())
</code></pre>
<p>and then blit background onto DISPLAYSURF. At each iteration, after everything has been updated but before anything else has been drawn, blit your background onto the DISPLAYSURF... | 1 | 2016-08-27T16:20:46Z | [
"python",
"pygame"
] |
Round-off / round-up criteria in Python | 39,182,861 | <p>I'm porting a MATLAB code to Python 3.5.1 and I found a float round-off issue.</p>
<p>In MATLAB, the following number is rounded <strong>up</strong> to the 6th decimal place:</p>
<pre><code>fprintf(1,'%f', -67.6640625);
-67.664063
</code></pre>
<p>In Python, on the other hand, the following number is rounded <str... | 5 | 2016-08-27T15:37:33Z | 39,187,125 | <p>The reason for the python behavior has to do with how floating point numbers are stored in a computer and the standardized rounding rules defined by IEEE, which defined the standard number formats and mathematical operations used on pretty much all modern computers.</p>
<p>The need to store numbers efficiently in b... | 4 | 2016-08-28T01:02:08Z | [
"python",
"matlab",
"rounding"
] |
How to define start value for ID column in SQLAlchemy for SQLServer? | 39,182,924 | <p>I interfacing SQLAlchemy between Flask and SQLServer.</p>
<p>I have an ID column which I would like to start from 10000. I couldn't find the answer.</p>
<p>Below is the SQL code, I am trying to convert to SQLAlchemy.</p>
<p>Please let me know.</p>
<p>Thx</p>
<pre><code>create TABLE [dbo].[Product](
[ID] [in... | 1 | 2016-08-27T15:45:23Z | 39,207,014 | <p>You'll need to do some changes after SQLAlchemy creates the table, as shown in the links above for MySQL, but with SQL Server.</p>
<pre><code>from sqlalchemy import event
from sqlalchemy import DDL
event.listen(
Article.__table__,
"after_create",
DDL("DBCC checkident (%(table)s, reseed, 9999)")
)
</code... | 0 | 2016-08-29T13:01:55Z | [
"python",
"sql-server",
"sqlalchemy",
"pymssql"
] |
I am trying to download data from Yahoo Finance using pandasb but nothing happens? | 39,183,147 | <pre><code>import pandas_datareader.data as web
import datetime
start = datetime.datetime(2010, 1, 1)
end = datetime.datetime(2013, 1, 27)
f = web.DataReader("ugaz", 'yahoo', start, end)
f.ix['2010-01-04']
</code></pre>
<p>The above is the code I am currently trying to use to get data from Yahoo Finance. when I run... | -1 | 2016-08-27T16:10:17Z | 39,183,262 | <p>The first datapoint is </p>
<pre><code>f.ix['2012-02-08']
Open 48.360002
High 48.360002
Low 48.360002
Close 48.360002
Volume 0.000000
Adj Close 6045.000287
Name: 2012-02-08 00:00:00, dtype: float64
</code></pre>
| 0 | 2016-08-27T16:22:43Z | [
"python",
"pandas",
"yahoo-finance"
] |
I am trying to download data from Yahoo Finance using pandasb but nothing happens? | 39,183,147 | <pre><code>import pandas_datareader.data as web
import datetime
start = datetime.datetime(2010, 1, 1)
end = datetime.datetime(2013, 1, 27)
f = web.DataReader("ugaz", 'yahoo', start, end)
f.ix['2010-01-04']
</code></pre>
<p>The above is the code I am currently trying to use to get data from Yahoo Finance. when I run... | -1 | 2016-08-27T16:10:17Z | 39,274,713 | <p>There are so many ways to download financial data, or any kind of data, from the web. The script below downloads stock prices and saves everything to a CSV file.</p>
<pre><code>import urllib2
listOfStocks = ["AAPL", "MSFT", "GOOG", "FB", "AMZN"]
urls = []
for company in listOfStocks:
urls.append('http://rea... | 0 | 2016-09-01T14:48:56Z | [
"python",
"pandas",
"yahoo-finance"
] |
Django with HTML Forms | 39,183,155 | <p>I know how to set up Django forms to have Django render them. Unfortunately styling forms then becomes a little less straight forward. I am interested in finding a way to have the HTML form pass its entered values to Django. The HTML form is completely programmed in HTML and CSS. Just for context, please find below ... | 0 | 2016-08-27T16:10:49Z | 39,183,460 | <p>Ok, I figured it out. </p>
<p>The trick was to realize that Django will already render its form tags (i.e. {{form.firstName}}) to an input tag. We can then add class attributes to this tag in in forms.py where we define this form:</p>
<p><strong>HTML:</strong></p>
<p><div class="snippet" data-lang="js" data-hide=... | 0 | 2016-08-27T16:43:21Z | [
"python",
"html",
"css",
"django"
] |
remove the screen in back of the Tkinter message box | 39,183,177 | <p>I want to show a message box, but without the parent window behind it in Python. This is my code:</p>
<pre><code>import Tkinter, tkFileDialog ,tkMessageBox
from fileManagerModule import fileManager
def load():
global myFile,flag,msg
flag=True
options = {}
options["title"] = "choose a text File"
... | -1 | 2016-08-27T16:13:10Z | 39,183,779 | <p>You can use the <code>withdraw()</code> function to remove the <code>window</code> being displayed in the background to just show the dialog box only.</p>
<p><strong>try this:</strong></p>
<pre><code>import Tkinter, tkFileDialog ,tkMessageBox
from fileManagerModule import fileManager
def load():
global myFile,... | 1 | 2016-08-27T17:17:56Z | [
"python",
"python-2.7",
"tkinter"
] |
C++ OOP: how to create a random number generator object? | 39,183,275 | <p>So this question is sort of one of translation. I am new to C++, and was looking through the class documentation. However, it looks like finding the answer to my question is a bit hard via the documentation. </p>
<p>I have code for generating a random number between 0 and 1 in C++: (obtained from <a href="http://... | -1 | 2016-08-27T16:24:00Z | 39,183,348 | <p>You can create a class that holds a random number generator as a private member variable (like <code>std::mt19937</code>) and seeds it in the constructor. Your <code>next</code> function could just invoke the stored generator to get the next value (applying whatever distribution you want (if any) of course).</p>
<p... | 2 | 2016-08-27T16:31:16Z | [
"python",
"c++",
"oop"
] |
C++ OOP: how to create a random number generator object? | 39,183,275 | <p>So this question is sort of one of translation. I am new to C++, and was looking through the class documentation. However, it looks like finding the answer to my question is a bit hard via the documentation. </p>
<p>I have code for generating a random number between 0 and 1 in C++: (obtained from <a href="http://... | -1 | 2016-08-27T16:24:00Z | 39,183,450 | <p>Seems like you just need some form of probability generation class, see below for a basic implementation which meets your question requirements:</p>
<pre><code>template<class Ty = double,
class = std::enable_if_t<std::is_floating_point<Ty>::value>
> class random_probability_generator {
public:... | 3 | 2016-08-27T16:42:29Z | [
"python",
"c++",
"oop"
] |
I get the error, list indices must be integers, do not know why? | 39,183,310 | <pre><code>for i in inpt:
for j in inpt[i]:
print j,
</code></pre>
<p>I want to access a 2D array, for each array i in inpt, I want to print each number j in the array i. I do not have any formal background in python and also I could not already find a solution on the internet.</p>
| 0 | 2016-08-27T16:27:33Z | 39,183,324 | <p>Python <code>for</code> loops are <a href="https://en.wikipedia.org/wiki/Foreach_loop" rel="nofollow"><em>foreach</em> loops</a>, in that you get the actual elements from the list and not an index. You are trying to use those elements as indices to <code>inpt</code> again.</p>
<p>Loop over <code>i</code>, not <code... | 1 | 2016-08-27T16:28:54Z | [
"python",
"python-2.7"
] |
Finding anchor tags within a table using selenium chromedriver | 39,183,383 | <p>I am trying to build an application that automates the process of downloading several anime episodes and i am stuck. So far i've been able to locate the episode links using the following code:</p>
<pre><code>def get_episodes(driver):
WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, "//a... | 2 | 2016-08-27T16:34:46Z | 39,183,490 | <p>Try to make your <code>XPath</code> more specific:</p>
<pre><code>//tr/td/a[starts-with(@href,'/Anime/')]
</code></pre>
| 1 | 2016-08-27T16:46:24Z | [
"python",
"selenium",
"selenium-chromedriver"
] |
Finding anchor tags within a table using selenium chromedriver | 39,183,383 | <p>I am trying to build an application that automates the process of downloading several anime episodes and i am stuck. So far i've been able to locate the episode links using the following code:</p>
<pre><code>def get_episodes(driver):
WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.XPATH, "//a... | 2 | 2016-08-27T16:34:46Z | 39,183,508 | <p>You're on the right track, but you may be over-thinking this a bit. Why not just target the table that we know has the episodes, then use a list comprehension to grab all the episode links?</p>
<pre><code>def get_episodes():
episode_table = driver.find_element_by_class_name('listing')
episode_links = [i.g... | 0 | 2016-08-27T16:48:17Z | [
"python",
"selenium",
"selenium-chromedriver"
] |
Python Save a (Sparse) Matrix with a variable inside | 39,183,417 | <p>I have some matrices of decent size (2000*2000) and I wish to have symbolic expressions in the elements of the matrices - i.e. <code>.9**b + .8**b + .7**b ...</code> is an example of an element. The matrices are quite sparse.</p>
<p>I am creating these matrices by adding up intermediate calculations. I would like t... | 6 | 2016-08-27T16:38:11Z | 39,214,491 | <p>The problem is likely coming from the fact that you are taking a symbolic power. But, for whatever reason, SymPy tries to find an explicit form for a symbolic power. For example:</p>
<pre><code>In [12]: x = Symbol('x')
In [13]: print(Matrix([[1, 2], [3, 4]])**x)
Matrix([[-2*(5/2 + sqrt(33)/2)**x*(-2/((-3/2 + sqrt(... | 0 | 2016-08-29T20:16:49Z | [
"python",
"sympy",
"symbolic-math"
] |
Write multiple Numpy arrays of different dtype as columns of CSV file | 39,183,471 | <p>What would be the best way to write multiple numpy arrays of different dtype as different columns of a single CSV file?</p>
<p>For instance, given the following arrays:</p>
<pre><code>array([[1, 2],
[3, 4],
[5, 6]])
array([[ 10., 20.],
[ 30., 40.],
[ 50., 60.]])
</code></pre>
<p>I ... | 2 | 2016-08-27T16:44:30Z | 39,183,525 | <p>use <code>np.concatenate</code> in order to concatenate the arrays along the second axis then use <a href="http://docs.scipy.org/doc/numpy/reference/generated/numpy.savetxt.html#numpy.savetxt" rel="nofollow"><code>np.savetxt</code></a> inorder to save your array in a a text format.</p>
<pre><code>import numpy as np... | 1 | 2016-08-27T16:50:41Z | [
"python",
"csv",
"numpy"
] |
Write multiple Numpy arrays of different dtype as columns of CSV file | 39,183,471 | <p>What would be the best way to write multiple numpy arrays of different dtype as different columns of a single CSV file?</p>
<p>For instance, given the following arrays:</p>
<pre><code>array([[1, 2],
[3, 4],
[5, 6]])
array([[ 10., 20.],
[ 30., 40.],
[ 50., 60.]])
</code></pre>
<p>I ... | 2 | 2016-08-27T16:44:30Z | 39,184,228 | <pre><code>In [38]: a=np.arange(1,7).reshape(3,2)
In [39]: b=np.arange(10,70.,10).reshape(3,2)
In [40]: c=np.concatenate((a,b),axis=1)
In [41]: c
Out[41]:
array([[ 1., 2., 10., 20.],
[ 3., 4., 30., 40.],
[ 5., 6., 50., 60.]])
</code></pre>
<p>All values are float; default <code>savetxt</c... | 1 | 2016-08-27T18:06:54Z | [
"python",
"csv",
"numpy"
] |
I do not get what expected on a regex expression | 39,183,538 | <p>I am looking for words in text6 that either contain a z or the sequence of characters pt or end with ize</p>
<p>I wrote the following but it includes many words that do not meet the above criteria like appease,dance,offensive,executive.... Why is this happening?</p>
<pre><code>L2=[w for w in text6 if re.search(r".... | 3 | 2016-08-27T16:51:51Z | 39,183,627 | <p>You are iterating over the characters not the words, for that case you need to split your text.</p>
<p>Also you can do all of these jobs without regex:</p>
<pre><code>from string import ascii_uppercase
def check_word(word):
return 'z' in word or 'pt' in word or word.endswith('ize') or word.startswith(tuple(as... | 2 | 2016-08-27T17:00:58Z | [
"python",
"regex"
] |
I do not get what expected on a regex expression | 39,183,538 | <p>I am looking for words in text6 that either contain a z or the sequence of characters pt or end with ize</p>
<p>I wrote the following but it includes many words that do not meet the above criteria like appease,dance,offensive,executive.... Why is this happening?</p>
<pre><code>L2=[w for w in text6 if re.search(r".... | 3 | 2016-08-27T16:51:51Z | 39,183,657 | <p>What you are looking for is:</p>
<pre><code>[w for w in text6 if re.search(r"z|pt|ize$", w)]
</code></pre>
<p>This will capture all the required words. Note that, the last part is not required as any word matching <code>ize$</code> will also match <code>z</code>. So essentially, the expression boils down to:</p>
... | 1 | 2016-08-27T17:04:24Z | [
"python",
"regex"
] |
I do not get what expected on a regex expression | 39,183,538 | <p>I am looking for words in text6 that either contain a z or the sequence of characters pt or end with ize</p>
<p>I wrote the following but it includes many words that do not meet the above criteria like appease,dance,offensive,executive.... Why is this happening?</p>
<pre><code>L2=[w for w in text6 if re.search(r".... | 3 | 2016-08-27T16:51:51Z | 39,183,736 | <p>I would suggest a non-regex approach here, since regex seems more complicated than this use case demands.</p>
<p>For one, you can get rid of the "ends in <code>ize</code>" constraint, because that falls under any words with <code>z</code> in it.</p>
<pre><code>text6 = [
'appease', 'dance', 'offensive', 'execut... | 2 | 2016-08-27T17:13:52Z | [
"python",
"regex"
] |
How to take real time input output from a python script on PHP | 39,183,586 | <p>I want to take input from user through a html form, process it through a python script and print the output on html page. The problem is the whole python script is executed each time, while I want the script to give real time output for each input. How can I manage to do this ? </p>
<p>Here is what I am doing so fa... | 0 | 2016-08-27T16:56:47Z | 39,183,710 | <p>The best way to solve your problem will be running simple python app using, let's say, <a href="http://flask.pocoo.org" rel="nofollow">Flask</a> and hit to specific endpoint you'll make in it. Everything then could take place through localhost, if you'll set it on the same machine.</p>
| 0 | 2016-08-27T17:10:25Z | [
"php",
"python"
] |
How `[System.Console]::OutputEncoding/InputEncoding` with Python? | 39,183,614 | <p>Under Powershell v5, Windows 8.1, Python 3. Why these fails and how to fix?</p>
<pre class="lang-bsh prettyprint-override"><code>[system.console]::InputEncoding = [System.Text.Encoding]::UTF8;
[system.console]::OutputEncoding = [System.Text.Encoding]::UTF8;
chcp;
"import sys
print(sys.stdout.encoding)
print(sys.... | 15 | 2016-08-27T16:59:53Z | 39,428,999 | <p>You are piping data into Python; at that point Python's <code>stdin</code> is no longer attached to a TTY (your console) and won't guess at what the encoding might be. Instead, the default system locale is used; on your system that's cp1251 (the Windows Latin-1-based codepage).</p>
<p>Set the <a href="https://docs.... | 8 | 2016-09-10T17:58:44Z | [
"python",
".net",
"shell",
"powershell"
] |
How `[System.Console]::OutputEncoding/InputEncoding` with Python? | 39,183,614 | <p>Under Powershell v5, Windows 8.1, Python 3. Why these fails and how to fix?</p>
<pre class="lang-bsh prettyprint-override"><code>[system.console]::InputEncoding = [System.Text.Encoding]::UTF8;
[system.console]::OutputEncoding = [System.Text.Encoding]::UTF8;
chcp;
"import sys
print(sys.stdout.encoding)
print(sys.... | 15 | 2016-08-27T16:59:53Z | 39,543,595 | <p>Why not embed CPython in powershell?! CPython is so easy to embed, and powershell is very good REPL to <a href="https://msdn.microsoft.com/en-us/powershell/scripting/getting-started/cookbooks/creating-.net-and-com-objects--new-object-" rel="nofollow">play with .NET and COM objects</a>. Here is a simple introduction ... | 2 | 2016-09-17T06:32:51Z | [
"python",
".net",
"shell",
"powershell"
] |
Understanding a memoization decorator as a closure | 39,183,653 | <p>I'm trying to learn about Python decorators, and I'd like to understand in more detail exactly how closure applies, for example in this memoization context:</p>
<pre><code>def memoize(f):
memo = {}
def helper(x):
if x not in memo:
memo[x] = f(x)
return memo[x]
... | 1 | 2016-08-27T17:03:55Z | 39,183,776 | <p>You've misunderstood what the <code>@memoize</code> decorator does. The decorator is not called each time you call <code>fib</code>. The decorator is called <em>just once</em> per function that is decorated.</p>
<p>The original <code>fib</code> function is <em>replaced</em> by the <code>helper()</code> function, wi... | 2 | 2016-08-27T17:17:31Z | [
"python",
"closures",
"memoization",
"python-decorators"
] |
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