Difference between null=True, blank=True in django

The main differnce for null and blank is 

How to deal with “SubfieldBase has been deprecated. Use Field.from_db_value...

How to deal with "SubfieldBase has been deprecated. Use Field.from_db_value instead." On upgrade to Django 1.9, we may now get the warning

Python: ImportError: cannot import name generic

After upgrading to django 1.9. Whenever I was executing the command ./manage.py runserver , I got the error :

Python 3: Unexpected Exception: name 'basestring' is not defined when invok...

Python 3: Unexpected Exception: name 'basestring' is not defined when invoking ansible2 

Python 3 - Django: ImportError: No module named 'django.core.urlresolvers'

Python 3 - Django 2.x: ImportError: No module named 'django.core.urlresolvers' is a common error we get when we migrate from python 2.x to python 3.x and use latest Django > 2.0. the common error message looks like 

Install specific git commit with pip

To install specific git commit with pip,  You can specify commit hash, branch name, tag.

What is @permalink and get_absolute_url in Django?

What is @permalink and get_absolute_url in Django? When and why to use it?

How to install Python package from GitHub?

Get the previous months name

Often we need to get previous months name in python, especially, when we have to save report from previous month's name. In python its is pretty simple.