ImportError: No module named flask.ext.login

If following does not work:

from flask.ext.login import LoginManager

try the following:

from flask_login import LoginManager

This is the new convention.

To find the flask-login version, you can run the following command in terminal. Just change the name to know the version of other packages.

pip show flask-login

python flask flask-login

Install pip and then use the following command:

C:\Python27\scripts>pip install Flask-Login

python flask flask-login

If you have already installed flask-login by

$pip install flask_login

Try replacing the

from flask.ext.login import LoginManager

with

from flask_login import LoginManager

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