Django debug toolbar import error of analysisdebug_toolbar
Question: Trying to install the django debug toolbar and receiving the following error:

    
    
    Traceback (most recent call last):
      File "/home/user/project/manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
      File "/home/user/project/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
        utility.execute()
      File "/home/user/project/env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 312, in execute
    django.setup()
      File "/home/user/project/env/local/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
      File "/home/user/project/env/local/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
      File "/home/user/project/env/local/lib/python2.7/site-packages/django/apps/config.py", line 86, in create
    module = import_module(entry)
      File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
    ImportError: No module named analysisdebug_toolbar
    

Package versions:

    
    
    Django==1.8.2
    django-debug-toolbar==1.3.0
    

Funny thing is this used to work but somehow broke due to some changes in the
project.


Answer: It looks like you are missing a comma in your `INSTALLED_APPS` setting.

Instead of:

    
    
    INSTALLED_APPS = (
        ...
        'analysis'
        'debug_toolbar',
        ...
    )
    

It should be:

    
    
    INSTALLED_APPS = (
        ... 
        'analysis',
        'debug_toolbar',
        ...
    )
    

When you forget the comma, Python concatonates `'analysis'` and
`'debug_toolbar'` into the string `analysisdebug_toolbar`. In Python, it's a
good idea to include a trailing comma in the last element in your list or
tuple. It allows you to add new items or rearrange the order without hitting
bugs like this.

