Feedback from Dash 3.0.0rc1

[ghaarsma]

Thank you Plotly Dash team for the release candidate and making React 18.3 the new default. We did a bunch of testing, but could not find any real regressions. We did want to provide two pieces of feedback:

1. We still got the 'pkgutil.find_loader' is deprecated and slated for removal in Python 3.14; use importlib.util.find_spec() instead DeprecationWarning. Its from venv\Lib\site-packages\dash\dash.py:1846
2. After the update (via Poetry) we still saw that Dash constrains flask & werkzeug to older (3.0.6 / 3.0.3) versions:
   werkzeug 3.0.6 3.1.3 The comprehensive WSGI web application library.
flask 3.0.3 3.1.0 A simple framework for building complex web applications.

Everything else ran very smooth. Thank you Dash team.

Stack: Python 3.12

(venv) PS C:\Users\Python\dwsc-site> poetry update
Updating dependencies
Resolving dependencies... (53.4s)

Package operations: 1 install, 1 update, 3 removals

  - Removing dash-core-components (2.0.0)
  - Removing dash-html-components (2.0.0)
  - Removing dash-table (5.0.0)
  - Installing stringcase (1.2.0)
  - Updating dash (2.18.2 -> 3.0.0rc1)

[ndrezn]

Great to hear! I've opened #3139 and #3138 to track these issues; I don't think they'll land in 3.0 but it's good to note.

Appreciate your kicking the tires on the RC! Feel free to open more issues if you find anything else.