问题
the exact error I get is :
flask.cli.NoAppException: While importing "application", an ImportError was raised:Traceback (most recent call last):
File "/home/harshit/.local/lib/python3.6/site-packages/flask/cli.py", line 240, in locate_app
__import__(module_name)
File "/home/harshit/Documents/project1/application.py", line 18, in <module>
Session(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 54, in __init__
self.init_app(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 61, in init_app
app.session_interface = self._get_interface(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 93, in _get_interface
config['SESSION_USE_SIGNER'], config['SESSION_PERMANENT'])
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/sessions.py", line 313, in __init__
from werkzeug.contrib.cache import FileSystemCache
ModuleNotFoundError: No module named 'werkzeug.contrib'
I am trying to import sessions from Flask
回答1:
Werkzeug 1.0.0 has removed deprecated code, including all of werkzeug.contrib. You should use alternative libraries for new projects. werkzeug.contrib.session was extracted to secure-cookie.
If an existing project you're using needs something from contrib, you'll need to downgrade to Werkzeug<1:
pip3 install Werkzeug<1
回答2:
If you still need deprecated code from werkzeug.contrib, you can downgrade Werkzeug version to less than 1.
pip install Werkzeug<1
来源：https://stackoverflow.com/questions/60624139/when-i-do-flask-run-it-shows-error-modulenotfounderror-no-module-named-werk