[ACCEPTED]-Can't import LoginManager() in Flask-flask
Accepted answer
You probably have a circular import. This 10 is fine, but you need to take into account 9 that you'll be working with modules that 8 haven't yet completed all top-level instructions.
If 7 you have code like:
from flask.ext.login import LoginManager
from app.admin import admin_blueprint
lm = LoginManager()
lm.init_app(app)
lm.login_view = 'login'
then app.admin will be imported 6 before the lm = LoginManager() line has executed; any code in app.admin that 5 then tries to address app.lm will fail.
Move blueprint 4 imports down your module and lm will have 3 been created already:
from flask.ext.login import LoginManager
lm = LoginManager()
lm.init_app(app)
lm.login_view = 'login'
from app.admin import admin_blueprint
See the Circular Imports note in the 'Larger 2 Applications' documentation section of the 1 Flask manual.
Source:
stackoverflow.com
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