On 8/22/21 7:04 AM, Mohsen Owzar wrote:
Hi guys,
I have on my laptop the python installation 3.8 and newly I installed newest
version 3.10 as well on my laptop.
Now I have two IDLEs for both of the installations.
When I rund some *.py file, having PyQt5 module, on the 3.8 version, it works
as before without any problems.
But whenn I run the same file on IDLE with 3.10 installation, it crashes and
says that PyQt5 is not known.
I tried to install this package with"pip install pyqt5" or with "py -3 -m pip
install pyqt5", it brings lots of error messages (long long) as the lines below (they are only
the beginning of the messages):
make sure you're getting the right Python by doing
py -3.10 -m pip install pyqt5
(the fact you're getting the build error below indicates you _are_
getting the right one, but it's good to be explicit anyway, just so
you're sure).
==================================================
C:\Users\Mohsen>py -3 -m pip install pyqt5
Collecting pyqt5
Using cached PyQt5-5.15.4.tar.gz (3.3 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... error
ERROR: Command errored out with exit status 1:
command:
'C:\Users\Mohsen\AppData\Local\Programs\Python\Python310\python.exe'
'C:\Users\Mohsen\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py'
prepare_metadata_for_build_wheel
'C:\Users\Mohsen\AppData\Local\Temp\tmprax0esmt'
cwd:
C:\Users\Mohsen\AppData\Local\Temp\pip-install-wl_b58e9\pyqt5_1cbd1bab46fa4abaad34b55514561ce6
Complete output (33 lines):
Querying qmake about your Qt installation...
C:\Qt\4.7.4\bin\qmake.exe -query
Traceback (most recent call last):
File
"C:\Users\Mohsen\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py",
line 143, in prepare_metadata_for_build_wheel
hook = backend.prepare_metadata_for_build_wheel
AttributeError: module 'sipbuild.api' has no attribute
'prepare_metadata_for_build_wheel'
Your problem here is that there's no released binary wheel for PyQt5,
since Py 3.10 isn't released (there's been some recent chatter about
encouraging projects to make builds for new Python versions available
early, e.g. once a Python version hits release candidate state, but
that's just that - chatter - for now).
In theory your system should be able to build it, but my experience is
that unless you're an active Python developer on Windows and already
have the right working setup, it pretty much always fails. These are
the perils of trying to use a pre-release...
That error suggests there's something different going on than usual
(which has to do with the MSVC compiler suite not being set up the way
the package expects): there looks like a version mismatch - it looks
like it's finding qmake for Qt4, not Qt5. Maybe you can make some
progress by adjusting some paths?
Many people go here to get early-access, albeit unofficial, binary wheels:
https://www.lfd.uci.edu/~gohlke/pythonlibs
Unfortunately, PyQt5 is not available from there (as listed in the
section at the very bottom)
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