python - Why doesn't this cause circular import -

i have flask app.

app.py

app = flask(__name__)  views import *  if __name__=="__main__":     app.run() 

views.py

from app import app  @app.route('/') def home():     return "homepage" 

so, here app.py importing form views.py , views need app defined in app.py. still not causing circular import. why?

i run application using:

python app.py 

this looks similar larger applications document flask allows when creating apps.

from docs:

circular imports

every python programmer hates them, , yet added some: circular imports (that’s when 2 modules depend on each other. in case views.py depends on __init__.py). advised bad idea in general here fine. reason not using views in __init__.py , ensuring module imported , doing @ bottom of file.