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sysconfig.get_config_var("SO") deprecated and removed in python 3.11 #44

Description

@donaldmunro

sysconfig.get_config_var("SO") is used in init.py:

_libsuinput_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "_libsuinput" + sysconfig.get_config_var("SO")))

but returns None in python 3.11:

python --version
Python 3.11.3

python
Python 3.11.3 (main, Apr  5 2023, 15:52:25) [GCC 12.2.1 20230201] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sysconfig
>>> print(sysconfig.get_config_var("SO"))
None

leading to errors like:

Traceback (most recent call last):
  File "/usr/lib/keyboard-center/main.py", line 8, in <module>
    from mainUi import MainWindow
  File "/usr/lib/keyboard-center/mainUi.py", line 23, in <module>
    from devices.keyboard import SUPPORTED_DEVICES, KeyboardInterface
  File "/usr/lib/keyboard-center/devices/keyboard.py", line 1, in <module>
    import uinput
  File "/usr/lib/python3.11/site-packages/uinput/__init__.py", line 86, in <module>
    _libsuinput_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "_libsuinput" + sysconfig.get_config_var("SO")))
                                                                                     ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TypeError: can only concatenate str (not "NoneType") to str

To fix change to

sysconfig.get_config_var("EXT_SUFFIX")

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