[Python] how to run a django python file from command line

I have a simple python file that I eventually want to run from chron.

It looks like this:

from customers.models import Customer, NotificationLogEntry


def hello():
customers = Customer.objects.all()
for c in customers:
log_entry = NotificationLogEntry(
customer=c,
sent=True,
notification_type=0,
notification_media_type=0,
)
log_entry.save()


if __name__ == '__main__':
hello()


When I run this with:

python notifications.py


I get an import error:

Traceback (most recent call last):
File "notifications.py", line 1, in <module>
from customers.models import Customer, NotificationLogEntry
ImportError: No module named customers.models


This module exists and I call it without any problem within my django app. Why am I getting this error outside of my app?

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