When I do Flask run, it shows error : ModuleNotFoundError: No module named 'werkzeug.contrib'. Can anyone help me with this?
Question:
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
Answers:
If you still need deprecated code from werkzeug.contrib, you can downgrade Werkzeug version to less than 1.
pip install Werkzeug<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
For Python 3.8
python3 -m pip uninstall werkzeug
python3 -m pip install werkzeug
python3 -m pip install flask-session
You will need to downgrade werkzeug version from 1.0.0 to 0.16.0
This solved the problem for me.
Just run the following commands in your project:
python3 -m pip uninstall werkzeug
and then
python3 -m pip install werkzeug==0.16.0
Either downgrade the version to 0.16.0 or replace werkzeug.contrib.cache with cachelib.
I can highly recommend upgrading the package. The deprecated module werkzeug.contrib is very easy to replace!
Install cachelib and replace all imports from:
from werkzeug.contrib.cache import FileSystemCache
to
from cachelib import FileSystemCache
After downgrading werkzeug:
pip install werkzeug==0.16.0
If you get the following:
flask 2.0.2 requires Werkzeug>=2.0, but you have werkzeug 0.16.0 which is incompatible
Consider doing:pip install flask==1.1.1
For my upgrade (0.15.5 -> 2.2.3) Everything is moved or removed from contrib to other modules. I recomend going to the documentation for your specific version of werkzeug and searching the library you are trying to import. I found mine!
from werkzeug.middleware.profiler import ProfilerMiddleware
app = ProfilerMiddleware(app)
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
If you still need deprecated code from werkzeug.contrib, you can downgrade Werkzeug version to less than 1.
pip install Werkzeug<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
For Python 3.8
python3 -m pip uninstall werkzeug
python3 -m pip install werkzeug
python3 -m pip install flask-session
You will need to downgrade werkzeug version from 1.0.0 to 0.16.0
This solved the problem for me.
Just run the following commands in your project:
python3 -m pip uninstall werkzeug
and then
python3 -m pip install werkzeug==0.16.0
Either downgrade the version to 0.16.0 or replace werkzeug.contrib.cache with cachelib.
I can highly recommend upgrading the package. The deprecated module werkzeug.contrib is very easy to replace!
Install cachelib and replace all imports from:
from werkzeug.contrib.cache import FileSystemCache
to
from cachelib import FileSystemCache
After downgrading werkzeug:
pip install werkzeug==0.16.0
If you get the following:
flask 2.0.2 requires Werkzeug>=2.0, but you have werkzeug 0.16.0 which is incompatible
Consider doing:pip install flask==1.1.1
For my upgrade (0.15.5 -> 2.2.3) Everything is moved or removed from contrib to other modules. I recomend going to the documentation for your specific version of werkzeug and searching the library you are trying to import. I found mine!
from werkzeug.middleware.profiler import ProfilerMiddleware
app = ProfilerMiddleware(app)