pythonflaskwerkzeugflask-restx

ImportError: cannot import name 'parse_rule' from 'werkzeug.routing'

I got the following message after running my Flask project on another system. The application ran all the time without problems:

Error: While importing 'app', an ImportError was raised:

Traceback (most recent call last):
  File "c:\users\User\appdata\local\programs\python\python39\lib\site-packages\flask\cli.py", line 214, in locate_app
    __import__(module_name)
  File "C:\Users\User\Desktop\Projekt\app\__init__.py", line 3, in <module>
    from flask_restx import Namespace, Api
  File "c:\users\User\appdata\local\programs\python\python39\lib\site-packages\flask_restx\__init__.py", line 5, in <module>
  File "c:\users\User\appdata\local\programs\python\python39\lib\site-packages\flask_restx\api.py", line 50, in <module>
    from .swagger import Swagger
  File "c:\users\User\appdata\local\programs\python\python39\lib\site-packages\flask_restx\swagger.py", line 18, in <module>
    from werkzeug.routing import parse_rule
ImportError: cannot import name 'parse_rule' from 'werkzeug.routing' (c:\users\User\appdata\local\programs\python\python39\lib\site-packages\werkzeug\routing\__i
nit__.py)

My requirements.txt

Flask~=2.1.2
psycopg2-binary==2.9.3
Flask-SQLAlchemy==2.5.1
flask-restx==0.5.1
qrcode~=7.3.1
PyPDF2==2.6.0
reportlab~=3.6.10
WTForms~=3.0.1
flask-bootstrap==3.3.7.1
flask-wtf==1.0.1
Solution

  • The workaround I use for now is to pin werkzeug to 2.1.2 in requirements.txt. This should only be done until the other libraries are compatible with the latest version of Werkzeug, at which point the pin should be updated.

    werkzeug==2.1.2