ModuleNotFoundError - but it exists.

Using Django Mystery Errors
1

Hi. I have just started building my first django app and am currently stuck at the part where I’m supposed to be executing a makemigrations command to create a new model called ‘userprofile’ right after I have added a reference to the configuration class in the INSTALLED_APPS setting.

Upon executing the ‘python manage.py makemigrations’ command in the terminal, I received this error:

Traceback (most recent call last):
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\config.py", line 244, in create
    app_module = import_module(app_name)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'core'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    django.setup()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\registry.py", line 91, in populate
    app_config = AppConfig.create(entry)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\config.py", line 250, in create
    app_config_class.__qualname__,
django.core.exceptions.ImproperlyConfigured: Cannot import 'core'. Check that 'apps.core.apps.CoreConfig.name' is correct.

This is my settings.py file. I have added the references “apps.core” and “apps.userprofile”:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'apps.core',
    'apps.userprofile',
]

When I removed ‘apps.core’, from INSTALLED_APPS and executed the ‘python manage.py makemigrations’ command in the terminal, I received this error:

Traceback (most recent call last):
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\config.py", line 244, in create
    app_module = import_module(app_name)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'userprofile'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    django.setup()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\registry.py", line 91, in populate
    app_config = AppConfig.create(entry)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\apps\config.py", line 250, in create
    app_config_class.__qualname__,
django.core.exceptions.ImproperlyConfigured: Cannot import 'userprofile'. Check that 'apps.userprofile.apps.UserprofileConfig.name' is correct.

When I execute the command ‘python manage.py makemigrations userprofile’ in the terminal, I receive the same error displayed above.

My ‘userprofile’ directory listings are as follows:

userprofile
userprofile_pycache_
userprofile\migrations
userprofile\migrations_init_.py
userprofile_init_.py
userprofile\admin.py
userprofile\apps.py
userprofile\models.py
userprofile\tests.py
userprofile\views.py

(The userprofile folder [and another folder called core] is in a folder called apps; which is in a folder called olasac).

This is my apps.py file:

from django.apps import AppConfig


class UserprofileConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'userprofile'

This is my models.py file:

#
#

from django.contrib.auth.models import User
from django.db import models


#
# Models

class Userprofile(models.Model):
    user = models.ForeignKey(User, related_name='userprofile', on_delete=models.CASCADE)
    active_team_id = models.IntegerField(default=0)

Django version-3.2.14
Python version-3.10.5
Pip version-20.1.1

I have also included a screenshot of my settings.py file in case there is some info I forgot to mention. The entire directory is visible in the image. Would have liked to add more but new users can only add one item of embedded media.

I suspect the problem may be due to the placement of my file directories but at this point, I’ve hit a brick wall and am not able to proceed with the project. Any advice?

Thanks in advance!

Screenshot (98)
Screenshot (98)1920×1080 230 KB

2

Unfortunately, that image is unreadable. Please do not post images here of code or other text data - copy/paste the text as needed in your posts.

It looks to me from your description that your structure looks something like this:

olasac/  - The project base directory
    apps/
        userprofile/
        core/

Is this an accurate description of your directory structure?

What directory contains your settings.py file? What’s your current directory when you’re running manage.py?

Note: If this is an accurate description, this is not the “standard” / “typical” Django project organization. Typically, you would have the userprofile and core directories directly under the olasac directory.

3

Yes, this directory structure is accurate.

The settings.py file is in another folder called olasac.

olasac/    - The project base directory (the manage.py file is in this folder).
      apps/
              core/
              userprofile/
      olasac/
             settings.py

manage.py:

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'olasac.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()
4

There are two things I can think of for you to try:

  • Move your core and userprofile directories up one level and remove the reference to apps from the references to those packages.

  • Add an __init__.py file in each of the apps, core, and userprofile directories.

Note: If you keep this directory structure, then all your “cross-app” module references will need to specify that apps prefix.

5

I tried your second solution first; to add an __init__.py file in each of the apps , core , and userprofile directories. This made no difference.

I then moved the core and userprofile directories up one level and removed the reference to apps from the references to those packages:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',

    'core',
    'userprofile',
]

I recieved this error:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\base.py", line 393, in execute
    self.check()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\management\base.py", line 423, in check
    databases=databases,
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\checks\registry.py", line 76, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\urls\resolvers.py", line 416, in check
    for pattern in self.url_patterns:
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\urls\resolvers.py", line 602, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\Hillis\Documents\Olasac\olasac_3_10_5\lib\site-packages\django\urls\resolvers.py", line 595, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\Hillis\Documents\Olasac\olasac\olasac\urls.py", line 19, in <module>
    from apps.core.views import frontpage, privacy, terms, plans
ModuleNotFoundError: No module named 'apps.core'
1 Like
6

By moving those files up one level, you need to remove all references to apps.

7

Thanks very much! Working well now.
All the best.