"ValueError: 'name' may not be empty." when Flask 2.3.x installed

[forceflow1049]

Flask appears to have made a change in the 2.3.x series that the name of a Blueprint cannot be the empty string.

For example, with Flask 2.3.2 installed, importing

from PyDMXControl.controllers import OpenDMXController

results in the exception:

File "C:\Users\ASC\Documents\constellation-dev\build\apps\venv_3_11\Lib\site-packages\PyDMXControl\web\_routes.py", line 17, in <module>
    routes = Blueprint('', __name__, url_prefix='/')
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ASC\Documents\constellation-dev\build\apps\venv_3_11\Lib\site-packages\flask\blueprints.py", line 196, in __init__
    raise ValueError("'name' may not be empty.")
ValueError: 'name' may not be empty.

I have verified this in Windows and macOS. Forcing the install of Flask 2.2.4 resolves this problem. The fix should be as easy as replacing '' with any value.

[pauljurczak]

The same (obviously) on Ubuntu 22.04.2 with Python 3.11.3.

pip install --force-reinstall flask==2.2.4

Fixes it.

[ZotAlan]

This worked for me. Thanks.

[MattIPv4]

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