From [allauth documentation](https://django-allauth.readthedocs.io/en/latest/faq.html#when-i-sign-up-i-run-into-connectivity-errors-connection-refused-et-al):

&gt; **When I sign up I run into connectivity errors (connection refused et al)**
&gt; 
&gt; 
&gt; You probably have not got an e-mail (SMTP) server running on the
&gt; machine you are developing on. Therefore, allauth is unable to send
&gt; verification mails.
&gt; 
&gt; You can work around this by adding the following line to settings.py:
&gt; 
&gt; EMAIL_BACKEND = &#39;django.core.mail.backends.console.EmailBackend&#39; This
&gt; will avoid the need for an SMTP server as e-mails will be printed to
&gt; the console. For more information, please refer to:
&gt; 
&gt; https://docs.djangoproject.com/en/dev/ref/settings/#email-backend

Alternatively if you have a social sign up, you probably do not require verification email so you can just add ```ACCOUNT_EMAIL_VERIFICATION = &#39;none&#39;``` to your settings. This will automatically solve the problem.

I am in the process of writing a `bash` clone in Rust.  I need to have my program exit when the user types `exit`.  In previous iterations of my program, before I added more complicated features, I used `return` to get out of the loop that was prompting the user for input. This logic is now in a function, because of the way I am implementing built in shell functions, so when I `return` it just jumps out of the function back into the control loop, instead of short-circuiting the control loop and ending the program.

I realize that I could probably return a boolean when the user types `exit` and exit the loop, but I would like to at least know if Rust has a way to terminate programs early, similar to Java&#39;s `System.exit()`, as this is useful for certain types of programs.

How do I exit a Rust program early from outside the main function?

I have a website that a lot of people view on mobile.
I have link for : Call and SMS and I want to add one for Whatsapp, so a user can click the whatsapp link I create and start a conversation with me.

If this is possible can someone point me in the right direction on how?

Add Whatsapp function to website, like sms, tel

I have the following error when I run django allauth example and it tries to send an email:

    File &quot;/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py&quot;, line 571, in create_connection
    raise err
    error: [Errno 61] Connection refused

Under OS X 10.9.1



Django allauth example [Errno 61] Connection refused

I have the following error when I run django allauth example and it tries to send an email:
<pre><code class="hljs language-arduino">File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 571, in create_connection
raise err
error: [Errno 61] Connection refused
</code></pre>
Under OS X 10.9.1

I&#39;ve written a bunch of code on the assumption that I was going to use Numpy arrays. Turns out the data I am getting is loaded through Pandas. I remember now that I loaded it in Pandas because I was having some problems loading it in Numpy. I believe the data was just too large.

Therefore I was wondering, is there a difference in computational ability when using Numpy vs Pandas?

If Pandas is more efficient then I would rather rewrite all my code for Pandas but if there is no more efficiency then I&#39;ll just use a numpy array...

Is there a performance difference between Numpy and Pandas?

I am using Python 2.7 + BeautifulSoup 4.3.2.

I am trying to use Python and BeautifulSoup to pick up information on a webpage. Because the webpage is in the company website and requires login and redirection, I copied the target page&#39;s source code page into a file and saved it as “example.html” in C:\ for the convenience of practicing.

This is a part of the original code:


	&lt;tr class=&quot;ghj&quot;&gt;
		&lt;td&gt;&lt;span class=&quot;city-sh&quot;&gt;&lt;sh src=&quot;./citys/1.jpg&quot; alt=&quot;boy&quot; title=&quot;boy&quot; /&gt;&lt;/span&gt;&lt;a href=&quot;./membercity.php?mode=view&amp;amp;u=12563&quot;&gt;port_new_cape&lt;/a&gt;&lt;/td&gt;
		&lt;td class=&quot;position&quot;&gt;&lt;a href=&quot;./search.php?id=12563&amp;amp;sr=positions&quot; title=&quot;Search positions&quot;&gt;452&lt;/a&gt;&lt;/td&gt;
		&lt;td class=&quot;details&quot;&gt;&lt;div&gt;South&lt;/div&gt;&lt;/td&gt;
		&lt;td&gt;May 09, 1997&lt;/td&gt;
		&lt;td&gt;Jan 23, 2009 12:05 pm&amp;nbsp;&lt;/td&gt;
	&lt;/tr&gt;


The code I worked out so far is:

    from bs4 import BeautifulSoup
    import re
    import urllib2

    url = &quot;C:\example.html&quot;
    page = urllib2.urlopen(url)
    soup = BeautifulSoup(page.read())

    cities = soup.find_all(&#39;span&#39;, {&#39;class&#39; : &#39;city-sh&#39;})

    for city in cities:
    print city

This is just the first stage of testing, so it&#39;s somewhat incomplete.

However, when I run it, it gives an error message. Seems it’s improper to use `urllib2.urlopen` to open a local file.


     Traceback (most recent call last):
       File &quot;C:\Python27\Testing.py&quot;, line 8, in &lt;module&gt;
         page = urllib2.urlopen(url)
       File &quot;C:\Python27\lib\urllib2.py&quot;, line 127, in urlopen
         return _opener.open(url, data, timeout)
       File &quot;C:\Python27\lib\urllib2.py&quot;, line 404, in open
         response = self._open(req, data)
       File &quot;C:\Python27\lib\urllib2.py&quot;, line 427, in _open
         &#39;unknown_open&#39;, req)
       File &quot;C:\Python27\lib\urllib2.py&quot;, line 382, in _call_chain
         result = func(*args)
       File &quot;C:\Python27\lib\urllib2.py&quot;, line 1247, in unknown_open
         raise URLError(&#39;unknown url type: %s&#39; % type)
     URLError: &lt;urlopen error unknown url type: c&gt;

How can I practice using a local file?


Using Python and BeautifulSoup (saved webpage source codes into a local file)

I have a csv file

    col1, col2, col3
    1, 2, 3
    4, 5, 6

I want to create a list of dictionary from this csv.

output as : 

    a= [{&#39;col1&#39;:1, &#39;col2&#39;:2, &#39;col3&#39;:3}, {&#39;col1&#39;:4, &#39;col2&#39;:5, &#39;col3&#39;:6}]

How can I do this?

convert csv file to list of dictionaries

Is there a way to change the default position of the percent label in a matplot lib pie chart?

Here is an example pie chart:

![My pie chart][1]

Which I have created using:

    plt.pie(sizes, labels=labels, colors=colors, explode=explode, autopct=&#39;%1.0f%%&#39;)

Now I don&#39;t like how some percent labels are intruding on other sections teritory (actually the only perpitrator in this example is the 9m section). Ideally I would like such labels to be outside the pie chart with an arrow of some sort pointing to the section, or alternativly just outside the section.

  [1]: http://i.stack.imgur.com/0fo5C.png

matplotlib percent label position in pie chart

I am trying to find the largest cube root that is a whole number, that is less than 12,000. 

    processing = True
    n = 12000
    while processing:
        n -= 1
        if n ** (1/3) == #checks to see if this has decimals or not

I am not sure how to check if it is a whole number or not though! I could convert it to a string then use indexing to check the end values and see whether they are zero or not, that seems rather cumbersome though. Is there a simpler way?

How to check if a float value is a whole number

I&#39;m new to Django and trying to make a simple guestbook application to get used to the environment. I get the following mistake, but I can&#39;t locate the error: 

**Exception Value: __init__() takes 1 positional argument but 2 were given.**

    from django.db import models
    from django.contrib.auth.models import User
    from django.contrib import admin
    
    class Bericht(models.Model):
    	titel = models.CharField(max_length=50)
    	auteur = models.ForeignKey(User, blank=True)
    	email = models.EmailField(max_length=75)
    	inhoud = models.TextField(max_length=10000, blank=True)
    	datum = models.DateTimeField(auto_now_add=True)
    	
    	def __str__(self):
    		return str(self.auteur) + &quot; : &quot; + str(self.titel)
    		
    	class Meta:
    		verbose_name_plural = &quot;berichten&quot;
    	
    class BerichtAdmin(admin.ModelAdmin):
    	list_display = [&quot;auteur&quot;, &quot;datum&quot;, &quot;titel&quot;]
    	list_filter = [&quot;datum&quot;, &quot;auteur&quot;]
    	
    admin.site.register(Bericht, BerichtAdmin)

The view

    from django.shortcuts import render
    from django.views.generic import ListView
    from Gastenboek.models import *
    
    class BerichtListView(ListView):
    	model = Bericht.objects.all()
    	template_name = &#39;template/bericht_lijst.html&#39;
    	paginate_by = 10
    	context_object_name = &quot;bericht_lijst&quot;
    # Create your views here.

urls.py

    from django.conf.urls import patterns, include, url
    
    from django.contrib import admin
    admin.autodiscover()
    
    urlpatterns = patterns(&#39;&#39;,
        # Examples:
        # url(r&#39;^$&#39;, &#39;Niels.views.home&#39;, name=&#39;home&#39;),
        # url(r&#39;^blog/&#39;, include(&#39;blog.urls&#39;)),
    
        url(r&#39;^admin/&#39;, include(admin.site.urls)),
    	(r&quot;^(\d+)/$&quot;, &#39;Gastenboek.views.BerichtListView&#39;),
    	(r&quot;&quot;, &#39;Gastenboek.views.BerichtListView&#39;),
    )

Traceback

    Environment:
    
    
    Request Method: GET
    Request URL: http://127.0.0.1:8000/
    
    Django Version: 1.6.1
    Python Version: 3.3.3
    Installed Applications:
    (&#39;django.contrib.admin&#39;,
     &#39;django.contrib.auth&#39;,
     &#39;django.contrib.contenttypes&#39;,
     &#39;django.contrib.sessions&#39;,
     &#39;django.contrib.messages&#39;,
     &#39;django.contrib.staticfiles&#39;,
     &#39;Gastenboek&#39;)
    Installed Middleware:
    (&#39;django.contrib.sessions.middleware.SessionMiddleware&#39;,
     &#39;django.middleware.common.CommonMiddleware&#39;,
     &#39;django.middleware.csrf.CsrfViewMiddleware&#39;,
     &#39;django.contrib.auth.middleware.AuthenticationMiddleware&#39;,
     &#39;django.contrib.messages.middleware.MessageMiddleware&#39;,
     &#39;django.middleware.clickjacking.XFrameOptionsMiddleware&#39;)
    
    
    Traceback:
    File &quot;C:\Python33\lib\site-packages\django\core\handlers\base.py&quot; in get_response
      114.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
    
    Exception Type: TypeError at /
    Exception Value: __init__() takes 1 positional argument but 2 were given



Simple guestbook django: __init__() takes 1 positional argument but 2 were given

We want to get the current time in India in our Django project. In settings.py, UTC is there by default. How do we change it to IST?

How to add Indian Standard Time (IST) in Django?

Django 1.6 proposes `@transaction.atomic` as part of the rehaul in the transaction management from 1.5.

I have a function which is called by a Django management command which is in turn called by cron, i.e. no HTTP request triggering transactions in this case. Snippet:

    from django.db import transaction
    
    @transaction.commit_on_success
    def my_function():
        # code here

In the above code block [`commit_on_success`](https://docs.djangoproject.com/en/1.6/topics/db/transactions/#django.db.transaction.commit_on_success) uses a single transaction for all the work done in `my_function`.

Does replacing `@transaction.commit_on_success` with `@transaction.atomic` result in the identical behaviour? `@transaction.atomic` [docs state](https://docs.djangoproject.com/en/3.0/topics/db/transactions/#django.db.transaction.atomic):

&gt; Atomicity is the defining property of database transactions. atomic
&gt; allows us to create a block of code within which the atomicity on the
&gt; database is guaranteed. If the block of code is successfully
&gt; completed, the changes are committed to the database. If there is an
&gt; exception, the changes are rolled back.


I take it that they result in the same behaviour; correct?

Is &quot;transaction.atomic&quot; same as &quot;transaction.commit_on_success&quot;?

How does one convert a django Model object to a dict with **all** of its fields?  All ideally includes foreign keys and fields with editable=False.

Let me elaborate.  Let&#39;s say I have a django model like the following:

    from django.db import models

    class OtherModel(models.Model): pass

    class SomeModel(models.Model):
        normal_value = models.IntegerField()
        readonly_value = models.IntegerField(editable=False)
        auto_now_add = models.DateTimeField(auto_now_add=True)
        foreign_key = models.ForeignKey(OtherModel, related_name=&quot;ref1&quot;)
        many_to_many = models.ManyToManyField(OtherModel, related_name=&quot;ref2&quot;)

In the terminal, I have done the following:

    other_model = OtherModel()
    other_model.save()
    instance = SomeModel()
    instance.normal_value = 1
    instance.readonly_value = 2
    instance.foreign_key = other_model
    instance.save()
    instance.many_to_many.add(other_model)
    instance.save()

I want to convert this to the following dictionary:

    {&#39;auto_now_add&#39;: datetime.datetime(2015, 3, 16, 21, 34, 14, 926738, tzinfo=&lt;UTC&gt;),
     &#39;foreign_key&#39;: 1,
     &#39;id&#39;: 1,
     &#39;many_to_many&#39;: [1],
     &#39;normal_value&#39;: 1,
     &#39;readonly_value&#39;: 2}

----------
Questions with unsatisfactory answers:

https://stackoverflow.com/questions/1123337/django-converting-an-entire-set-of-a-models-objects-into-a-single-dictionary

https://stackoverflow.com/questions/12382546/how-can-i-turn-django-model-objects-into-a-dictionary-and-still-have-their-forei

Convert Django Model object to dict with all of the fields intact

I noticed that there are two different projects for using redis for django cache

https://github.com/sebleier/django-redis-cache/

https://github.com/niwibe/django-redis

Is one better known than the other, more of a standard package? I can&#39;t decide which to use.



Difference between django-redis-cache and django-redis for redis caching with Django?

I want a menu thats custom depending which group you are member of.
Im using Django 1.10.1, allauth and so on. 
When im trying to make my templatetag it fails and it says:&#168;

    TemplateSyntaxError at /
    &#39;my_templatetag&#39; is not a registered tag library. Must be one of:
    account
    account_tags
    admin_list
    admin_modify
    admin_static
    admin_urls
    cache
    i18n
    l10n
    log
    socialaccount
    socialaccount_tags
    static
    staticfiles
    tz

&#39;my_templatetag.py&#39; looks like this:

    from django import template
    from django.contrib.auth.models import Group
    
    
    register = template.Library()
    
    @register.filter(name=&#39;has_group&#39;)
    def has_group(user, group_name):
        group =  Group.objects.get(name=group_name)
        return group in user.groups.all()

and tha error comes in my .html file which say,

    {%  load my_templatetag %}

I have tried to restart the server like millions of times, also i tried to change all the names, and the app is a part of INSTALLED_APPS in settings.py.
What am I doing wrong?



Content Type	Original Author	Original Content on Stackoverflow
Question	arthur.sw	View Question on Stackoverflow
Solution 1 - Python	arthur.sw	View Answer on Stackoverflow
Solution 2 - Python	christk	View Answer on Stackoverflow

Django allauth example [Errno 61] Connection refused

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Add Whatsapp function to website, like sms, tel

How do I exit a Rust program early from outside the main function?

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