Django.setup()

Calling django.setup() is required for “standalone” Django usage

If you’re using components of Django “standalone” – for example, writing a Python script which loads some Django templates and renders them, or uses the ORM to fetch some data – there’s one more step you’ll need in addition to configuring settings.(當編寫Python script並在其中調用Django的templates, render或者orm的時候，需要使用django.setup())

After you’ve either set DJANGO_SETTINGS_MODULE or called configure(), you’ll need to call django.setup() to load your settings and populate Django’s application registry. For example:

import django
from django.conf import settings
from myapp import myapp_defaults

settings.configure(default_settings=myapp_defaults, DEBUG=True)
django.setup()

# Now this script or any imported module can use any part of Django it needs.
from myapp import models

或者

import sys
import os

if __name__ == '__main__':
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "my_app.settings")
    import django
    django.setup()
    from my_app import models
    ....