Why can't FLASK_APP find my factory function?
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I am trying to reconfigure an existing Flask app with an application factory to be installed with
Currently, with my non-installable package, I use a file called
wsgi.py and point
FLASK_APP at that.
from example.factory import create_app app = create_app()
export FLASK_APP=wsgi.py flask run
However, if I try to point Flask directly at the factory in the installed package, I get
RuntimeError: Failed to find application in module "example.factory". I found this pattern in the examples in the Flask repository.
export FLASK_APP="example.factory:create_app()" flask run # doesn't find the app
Why does the
wsgi.py method work while the direct method fails?
You need to use the docs and examples that match the version of Flask that you're using.
You're looking at the tutorial from the master branch. But you're using the current Flask release, which doesn't support detecting app factories yet. You still need to use your current method of pointing at a file that creates the app until 1.0 is released.
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I kept my flask application name as
Changing this to
flaskfile.py or any other name but not
flask alone worked for me
Maybe flask is a keyword.
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Double check that you actually return the 'app' variable in your create_app.
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- Looks like, naming the file just "flask.py" will not work.