After updating to Python 3.14 I had the same problem starting Leo.
*File "N:\git\leo-editor\leo\core\leoQt.py", line 6, in <module> from PyQt6 import QtCore, QtGui, QtWidgetsModuleNotFoundError: No module named 'PyQt6.sip'* I needed to uninstall packages PyQt6 and PyQt6_sip, then reinstall. Leo then worked fine. Both my desktop PC and laptop had the same issue. There have been other packages which did not work correctly with Python 3.14 and a package reinstall was needed. On Wednesday, October 15, 2025 at 2:17:14 AM UTC+11 rengel wrote: > [image: ModuleNotFoundError.png] > > > A correction: The installation from github did install launchLeo.py. But > starting 'python launchLeo.py' still results in the error: > ModuleNotFoundError: No module named 'PyQt6.sip'. (I did install the > requirements.) > > On Tuesday, October 14, 2025 at 5:00:37 PM UTC+2 rengel wrote: > >> Thank you for your answers! >> I waited for a couple of days to install the latest version of leo. But >> in vain. I tried both the pip install and the install from github. But in >> both cases I get the same error shown in my original post. Upon closer >> inspection, I noticed that neither launchLeo.py nor PyQt6.sip have been >> installed. And the installation didn't install a Leo home directory for me. >> >> >> On Thursday, October 9, 2025 at 11:08:55 PM UTC+2 [email protected] >> wrote: >> >>> I just installed Python 3.14 on Windows 11. Then I created a new virtual >>> environment and pip-installed Leo into it. PyQt6.sip got installed and Leo >>> ran normally. Something went wrong when @rengel tried installing Leo, I >>> think, because PyQt6 didn't install normally. >>> >>> I'd suggest creating a venv like I did and trying it that way. >>> >>> On Thursday, October 9, 2025 at 4:48:45 PM UTC-4 Thomas Passin wrote: >>> >>>> I don't think that's it - PyQt6.sip normally gets installed during a >>>> PyQt6 installation. >>>> >>>> On Thursday, October 9, 2025 at 2:52:51 PM UTC-4 [email protected] >>>> wrote: >>>> >>>>> @rengel, >>>>> >>>>> rengel schrieb am Donnerstag, 9. Oktober 2025 um 16:43:08 UTC+2: >>>>> >>>>> Hi, >>>>> yesterday I updated my machine from Windows 10 to Winddos 11. Today, I >>>>> completely removed all my old Python installations and then installed the >>>>> new Python 3.14. From Python I did a fresh install of Leo from PyPi >>>>> (`python -m pip install leo`) as described on the Leo website. During the >>>>> install I got the following WARNING: >>>>> [image: leo-warning.png] >>>>> When I start leo, I get the following error:[image: leo-error.png] >>>>> The environment contains the correct paths to Python and >>>>> Python\Scripts. >>>>> >>>>> >>>>> You installed the latest version of Leo from PyPI, which is version >>>>> 6.8.6.1. >>>>> >>>>> This version does NOT yet support Python 3.14.0 ! >>>>> >>>>> If you want to try it out before Edward releases version 6.8.7, you >>>>> have to use the 'devel' branch from GitHub. >>>>> >>>>> See >>>>> https://leo-editor.github.io/leo-editor/installing.html#installing-leo-from-github >>>>> >>>>> With kind regards, >>>>> >>>>> Viktor >>>>> >>>>> -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/leo-editor/237a8b2d-ca99-40e2-9fdc-8d4aba6997ban%40googlegroups.com.
