cannot import contextvar' from werkzeug

ImportError cannot import name 'ContextVar' when using Werkzeug with FlaskAPI

stackoverflow.com › questions › 72547532 › importerror-cannot-import-name-contextvar-when-using-werkzeug-with-flaskapi

Based on a quick glance through the tutorial, it looks like it might be a package version compatibility issue.

Have you tried upgrading Flask and Werkzeug to the latest versions?

Maybe try:

pip install Flask Werkzeug -U

Answer from Bradley on Stack Overflow

GitHub

github.com › pallets › werkzeug › issues › 2163

cannot import name 'ContextVar' from 'werkzeug.local' · Issue #2163 · pallets/werkzeug

June 14, 2021 - $ python app.py Traceback (most recent call last): File "/vagrant/APIs/alpha/app.py", line 1, in <module> from flask import Flask, jsonify, request File "/usr/lib/python3.9/site-packages/flask/__init__.py", line 7, in <module> from .app import Flask as Flask File "/usr/lib/python3.9/site-packages/flask/app.py", line 19, in <module> from werkzeug.local import ContextVar ImportError: cannot import name 'ContextVar' from 'werkzeug.local' (/home/vagrant/.local/lib/python3.9/site-packages/werkzeug/local.py) Environment: Python version: Python 3.9.5 ·

Author pallets

Local variables not available in debug console in version 1.0 · Issue #1746 · pallets/werkzeug Mar 11, 2020

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Flask setup.py should use "Werkzeug ~= 2.2.2" instead of "Werkzeug >= 2.2.2" · Issue #5285 · pallets/flask Oct 4, 2023

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Incompatibility issues with werkzeug 1.0 · Issue #3490 · pallets/flask Feb 7, 2020

6y ago

Replace worker use of `threading.local()` with ContextVar · Issue #5485 · dask/distributed Nov 1, 2021

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Version 1.0.0 removed previously deprecated code · Issue #1714 · pallets/werkzeug Feb 6, 2020

6y ago

More results from github.com

GitHub

github.com › pallets › werkzeug › issues › 2324

cannot import name 'ContextVar' from 'werkzeug.local' · Issue #2324 · pallets/werkzeug

January 28, 2022 - File "/var/folders/03/20fw2gm138lgd8xy1khdjbt80000gn/T/zeit-fun-f7652521ec5a2/_lib/utils/auth.py", line 7, in <module> from flask import _request_ctx_stack, request File "/var/folders/03/20fw2gm138lgd8xy1khdjbt80000gn/T/zeit-fun-f7652521ec5a2/flask/__init__.py", line 7, in <module> from .app import Flask as Flask File "/var/folders/03/20fw2gm138lgd8xy1khdjbt80000gn/T/zeit-fun-f7652521ec5a2/flask/app.py", line 19, in <module> from werkzeug.local import ContextVar ImportError: cannot import name 'ContextVar' from 'werkzeug.local' (/var/folders/03/20fw2gm138lgd8xy1khdjbt80000gn/T/zeit-fun-f7652521ec5a2/werkzeug/local.py)

Author pallets

Discussions

Issues with M1

Post the error

Top answer

1 of 2

2

Based on a quick glance through the tutorial, it looks like it might be a package version compatibility issue.

Have you tried upgrading Flask and Werkzeug to the latest versions?

Maybe try:

pip install Flask Werkzeug -U

2 of 2

0

It's version incompatibility that's causing the issue. A clean uninstall followed by a fresh install should fix the issue.

pip uninstall Flask Werkzeug
pip install Flask Werkzeug

Arch Linux

bugs.archlinux.org › task › 70815

FS#70815 : [python-flask] ImportError: cannot import name 'ContextVar' from 'werkzeug.local'

May 12, 2021 - Looks like it needs python-werkzeug 2.0.0+ Comment by Keith Hughitt (khughitt) - Thursday, 13 May 2021, 22:42 GMT

GitHub

github.com › pallets › flask › issues › 4429

ImportError: cannot import name 'ContextVar' from 'werkzeug.local' · Issue #4429 · pallets/flask

ImportError: cannot import name 'ContextVar' from 'werkzeug.local'#4429 · Copy link · remdragon · opened · on Jan 22, 2022 · Issue body actions · Flask is trying to import ContextVar which doesn't exist. Here is the minimum reproducible example: #!/usr/bin/env python3 import flask ·

Author pallets

reddit.com › r/flask › issues with m1

r/flask on Reddit: Issues with M1

January 8, 2022 -

Hello, I am trying to start a flask all but I can’t because I’m getting an error. Has anyone else had issues with the M1 and flask?

Edit: it fixed itself somehow. Computers are weird.

Post the error

I know the problem solved itself, but you should look into virtual environments when working with M1. It made my life so much easier, and it’s generally good practice when developing projects.

Werkzeug

werkzeug.palletsprojects.com › en › stable › local

Context Locals — Werkzeug Documentation (3.1.x)

Werkzeug provides wrappers around ContextVar to make it easier to work with. LocalProxy allows treating a context var as an object directly instead of needing to use and check ContextVar.get(). If the context var is set, the local proxy will look and behave like the object the var is set to. If it’s not set, a RuntimeError is raised for most operations. from contextvars import ContextVar from werkzeug.local import LocalProxy _request_var = ContextVar("request") request = LocalProxy(_request_var) from werkzeug.wrappers import Request @Request.application def app(r): _request_var.set(r) check_auth() ...

GitHub

github.com › michaljach › python-flask-mongoengine-docker-starter › issues › 1

Issue with ContextVar from werkzeug.local · Issue #1 · michaljach/python-flask-mongoengine-docker-starter

example-web | Traceback (most recent call last): example-web | File "api/app.py", line 4, in example-web | from flask import Flask example-web | File "/usr/local/lib/python3.8/site-packages/flask/init.py", line 7, in example-web | from .app import Flask as Flask example-web | File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 19, in example-web | from werkzeug.local import ContextVar example-web | ImportError: cannot import name 'ContextVar' from 'werkzeug.local' (/usr/local/lib/python3.8/site-packages/werkzeug/local.py)

Author michaljach

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Stack Overflow

stackoverflow.com › questions › 70357672 › flask-socketi-need-to-detect-duplicate-connections-on-opening-new-tab

Flask SocketI) need to detect duplicate connections on opening new tab - Stack Overflow

Top answer

1 of 1

2

you need to update werkzeug to 2.0 +

Stack Overflow

stackoverflow.com › questions › 68059378 › how-to-secure-a-server-side-session-in-flask

python - How to secure a server-side session in flask? - Stack Overflow

from werkzeug.contrib.cache import FileSystemCache ModuleNotFoundError: No module named 'werkzeug.contrib' So the solution suggested is to downgrade the werkzeug to 0.16.0 which I did. But now the issue is · cannot import name 'ContextVar' from 'werkzeug.local'

GitHub

github.com › pallets › werkzeug › issues › 2167

Downgrade doesn't fix 'werkzeug.contrib' Error · Issue #2167 · pallets/werkzeug

June 20, 2021 - from werkzeug.contrib.cache import ... name 'ContextVar' from 'werkzeug.local' For which the solution provided is to upgrade werkzeug to 2.0 or above....

Author pallets

Werkzeug

werkzeug.palletsprojects.com › en › stable › changes

Changes — Werkzeug Documentation (3.1.x)

May 11, 2021 - Using gevent or eventlet requires greenlet>=1.0 or PyPy>=7.3.7. werkzeug.locals and contextvars will not work correctly with older versions. #2278 · Remove previously deprecated code. #2276 · Remove the non-standard shutdown function from the WSGI environ when running the development server.

GitHub

github.com › pallets › flask › issues › 4015

2.0.0: build requires ContextVar module · Issue #4015 · pallets/flask

May 11, 2021 - + /usr/bin/python3 setup.py build '--executable=/usr/bin/python3 -s' Traceback (most recent call last): File "setup.py", line 4, in <module> setup( File "/usr/lib/python3.8/site-packages/setuptools/__init__.py", line 144, in setup return distutils.core.setup(**attrs) File "/usr/lib64/python3.8/distutils/core.py", line 121, in setup dist.parse_config_files() File "/usr/lib/python3.8/site-packages/setuptools/dist.py", line 689, in parse_config_files parse_configuration(self, self.command_options, File "/usr/lib/python3.8/site-packages/setuptools/config.py", line 121, in parse_configuration meta.

Author pallets

PyPI

pypi.org › project › contextvars

contextvars

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Stack Overflow

stackoverflow.com › questions › 56882369 › no-module-named-contextvars-in-python-3-7-3-virtual-environment

django - No module named '_contextvars' in Python 3.7.3 virtual environment - Stack Overflow

Top answer

1 of 3

2

The issue was with Global Python interpreter itself.

I followed Installing Python 3.7 on Ubuntu from Source in https://linuxize.com/post/how-to-install-python-3-7-on-ubuntu-18-04/ for installing Python 3.7.

Somehow it is not installing all the required packages for python interpreter.

Everything works fine if I install using Installing Python 3.7 on Ubuntu with Apt.

2 of 3

1

In my case, the python version installed in the virtual environment was 3.7.2 and the only version I had in my Computer was 3.7.3. So, I reinstalled the version 3.7.2 and it worked. Hope it works for you !!!

GitHub

github.com › lektor › lektor › issues › 909

Unable to install d/t Werkzeug / Flask / Lektor Dependency issue (temp fixed by rolling back flask.) · Issue #909 · lektor/lektor

May 24, 2021 - Installing collected packages: ... Werkzeug-2.0.1 Successfully installed Lektor-3.2.0 Werkzeug-0.16.1 · When I tried to run lektor quickstart or lektor server, I got this error: ImportError: cannot import name 'ContextVar' from 'werkzeug.local'...

Author lektor

Werkzeug

werkzeug.palletsprojects.com › en › latest › local

Context Locals — Werkzeug Documentation (3.2.x)

Werkzeug provides wrappers around ContextVar to make it easier to work with. LocalProxy allows treating a context var as an object directly instead of needing to use and check ContextVar.get(). If the context var is set, the local proxy will look and behave like the object the var is set to. If it’s not set, a RuntimeError is raised for most operations. from contextvars import ContextVar from werkzeug.local import LocalProxy _request_var = ContextVar("request") request = LocalProxy(_request_var) from werkzeug.wrappers import Request @Request.application def app(r): _request_var.set(r) check_auth() ...

GitHub

github.com › pallets › werkzeug › blob › main › src › werkzeug › local.py

werkzeug/src/werkzeug/local.py at main · pallets/werkzeug

The comprehensive WSGI web application library. Contribute to pallets/werkzeug development by creating an account on GitHub.

Author pallets

Fossies

fossies.org › linux › flask › src › flask › app.py

Fossies

Member "flask-2.2.0/src/flask/app.py" (2 Aug 2022, 97045 Bytes) of package /linux/www/flask-2.2.0.tar.gz: · As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) Python source code syntax highlighting (style: standard) with prefixed line ...

Githubhot

githubhot.com › repo › pallets › flask › issues › 4429

ImportError: cannot import name 'ContextVar' from 'werkzeug.local' - bytemeta

You need to use a recent Werkzeug version. If you install OS packages and get this combination you may want to report this as a bug to the maintainers of these packages. ... New project copied from an old one, instructions were to install that specific version of werkzeug because of ...