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Simple example fails to run with python 3.14 #36

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Simple example fails to run with python 3.14#36

Description

@Chaz6
Chaz6
opened on Apr 29, 2026

Setup:-

python3 -m venv venv
venv/bin/pip install pyenv
cat >pyenv-demo.py <<EOF
from pywry import PyWry
app = PyWry()
app.show("Hello World!")
app.block()  # Keep the window open until user closes it
EOF
venv/bin/python pyenv-demo.py

Output:-

[pywry-subprocess] Traceback (most recent call last):
[pywry-subprocess]   File "<frozen runpy>", line 198, in _run_module_as_main
[pywry-subprocess]   File "<frozen runpy>", line 88, in _run_code
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pywry/__main__.py", line 148, in <module>
[pywry-subprocess]     import pytauri_plugins  # noqa: E402  # pylint: disable=wrong-import-order,wrong-import-position
[pywry-subprocess]     ^^^^^^^^^^^^^^^^^^^^^^
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri_plugins/__init__.py", line 10, in <module>
[pywry-subprocess]     from pytauri import EXT_MOD
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri/__init__.py", line 7, in <module>
[pywry-subprocess]     from pytauri.ffi import (
[pywry-subprocess]     ...<45 lines>...
[pywry-subprocess]     )
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri/ffi/__init__.py", line 8, in <module>
[pywry-subprocess]     from pytauri.ffi._ext_mod import EXT_MOD
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri/ffi/_ext_mod.py", line 84, in <module>
[pywry-subprocess]     EXT_MOD = _load_ext_mod()
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri/ffi/_ext_mod.py", line 51, in _load_ext_mod
[pywry-subprocess]     ext_mod = eps[0].load()
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/importlib_metadata/__init__.py", line 226, in load
[pywry-subprocess]     module = import_module(self.module)
[pywry-subprocess]   File "/usr/lib64/python3.14/importlib/__init__.py", line 88, in import_module
[pywry-subprocess]     return _bootstrap._gcd_import(name[level:], package, level)
[pywry-subprocess]            ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pywry/_vendor/pytauri_wheel/__init__.py", line 2, in <module>
[pywry-subprocess]     from pywry._vendor.pytauri_wheel.lib import builder_factory, context_factory
[pywry-subprocess]   File "/home/chaz/scratch/venv/lib/python3.14/site-packages/pywry/_vendor/pytauri_wheel/lib.py", line 16, in <module>
[pywry-subprocess]     from pytauri import Builder, Context
[pywry-subprocess] ImportError: cannot import name 'Builder' from 'pytauri' (consider renaming '/home/chaz/scratch/venv/lib/python3.14/site-packages/pytauri/__init__.py' if it has the same name as a library you intended to import)
pywry - ERROR - Subprocess did not become ready
pywry - WARNING - Failed to start pytauri subprocess

Activity

  1. deeleeramone commented on Apr 30, 2026

    @deeleeramone
    deeleeramone
    on Apr 30, 2026
    Owner

    You should definitely be installing this in a Virtual Environment (activate before installing and using)

    Calling the Python executable isn't the same as using an environment, you are just using the system Python because it's a symlink.

    You may also need some of these:

    sudo apt-get install libwebkit2gtk-4.1-dev libgtk-3-dev libglib2.0-dev \
    libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 \
    libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 \
    libxcb-shape0 libgl1 libegl1

  2. deeleeramone commented on Apr 30, 2026

    @deeleeramone
    deeleeramone
    on Apr 30, 2026
    Owner

    What kind of machine and OS is this? WSL2 seems to work as-expected. Make sure the environment is activated.

    Image

  3. deeleeramone commented on May 9, 2026

    @deeleeramone
    deeleeramone
    on May 9, 2026
    Owner

    Version 2.0.1 rearranges the import order with respect to environment variables. Resolved by #41

    Image
  4. deeleeramone
    closed this as completedon May 9, 2026
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