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Is there a preferred naming convention for creating a Django app consisting of more than one word? For instance, which of the following is preferred?

1. my_django_app
2. my-django-app Update: Not allowed syntactically
3. mydjangoapp Recommended solution

While all of them may be options 1 and 3 are syntactically allowed, is there a preference? Looking at the way Django creates the table names by combining the app name and the model name with an underscore, I'm leaning against option #1.

Thoughts?

Answers

They must be valid package names. That rules out 2 ("import my-django-app" would be a syntax error). PEP 8 says:

Modules should have short, all-lowercase names. Underscores can be used in the module name if it improves readability. Python packages should also have short, all-lowercase names, although the use of underscores is discouraged.

So, 1 and 3 are both valid, but 3 would be the recommended approach.