Has anyone successfully run NiceGUI with Python 3.14?

[daya0576]

Python 3.14 is now available, but after upgrading, I was unable to start the nicegui server:

  File "/Users/mini/repo/beaverhabits/beaverhabits/views.py", line 9, in <module>
    from nicegui import app, run, ui
  File "/Users/mini/repo/beaverhabits/.venv/lib/python3.14/site-packages/nicegui/__init__.py", line 1, in <module>
    from . import binding, elements, html, run, storage, ui
  File "/Users/mini/repo/beaverhabits/.venv/lib/python3.14/site-packages/nicegui/html.py", line 3, in <module>
    from .element import Element
  File "/Users/mini/repo/beaverhabits/.venv/lib/python3.14/site-packages/nicegui/element.py", line 17, in <module>
    from .dependencies import (
    ...<7 lines>...
    )
  File "/Users/mini/repo/beaverhabits/.venv/lib/python3.14/site-packages/nicegui/dependencies.py", line 9, in <module>
    import vbuild
  File "/Users/mini/repo/beaverhabits/.venv/lib/python3.14/site-packages/vbuild/__init__.py", line 33, in <module>
    hasLess = bool(pkgutil.find_loader("lesscpy"))
                   ^^^^^^^^^^^^^^^^^^^
AttributeError: module 'pkgutil' has no attribute 'find_loader'

[daya0576]

From the error stacks, it seems like a compatibility of vbuild 🤔

[python-and-novella]

the git version resolves it.

[falkoschindler]

Hi @daya0576,

We're working on it, see PR #5243. It's already merged and should be released shortly (today or tomorrow I hope).

[evnchn]

The replies above sums things up.

@daya0576 If you are in an urgent, either patch it yourself, or install from git.

For install from git using pip the command would be pip install git+https://github.com/manatlan/vbuild@31157af79eeb8ef86e37f6f4965fcc8a1391d6a1. It will warn requires vbuild>=0.8.2 ... but you have vbuild 0.0.0 but it's fine...

Even when we release NiceGUI patch release 3.0.4, we will still install from git until the release comes, so the result is the same.

[daya0576]

Glad to hear about that! no rush ;)

[python-and-novella]

NiceGUI 3.0.4 has released.
https://github.com/zauberzeug/nicegui/releases/tag/v3.0.4