Flask-Login cannot import name "parse rule' from 'werkzeug.routing'

[MuNeNICK]

I developed an application with Flask and got the following error.

File "/usr/local/lib/python3.9/site-packages/flask_login/utils.py", line 14, in <module>
from werkzeug. routing import parse rule
ImportError: cannot import name
"parse rule' from 'werkzeug.routing'(/usr/local/lib/python3.9/site-packages/werkzeug/routing/__init__.py)

However, when I downgraded the werkzeug version to 2.1.2, the error did not occur.

Environment:

• Python version:3.9
• Flask version:2.0.1 and 2.1.3
• Werkzeug version:2.2.0

[ThiefMaster]

parse_rule was marked as internal, and due to changes in 2.2 (most likely in #2433) it no longer exists as a global function.

PS: Did you type that error message manually? It does NOT look like something copy-pasted. In this case it was still somewhat clear, but there are other errors people report where lack of details or full tracebacks are an issue. So it's better to always parse full errors when reporting something.

[bruntonspall]

It looks like the flask_login package was using parse_rule, it's just broken in a bit of my code as well.

This looks to have been opened here: maxcountryman/flask-login#686 but since the import error is thrown from WerkZeug, people may come here first.

[bbnil]

also affects flask-restx
python-restx/flask-restx#460