[WxPython] Linux: No module named 'wx'

[PeterLinux]

I typed:

pip install wxPython-4.0.7.post2-cp37-cp37m-linux_x86_64.whl

And got this error:

Error:
wxPython-4.0.7.post2-cp37-cp37m-linux_x86_64.whl is not a supported wheel on this platform.

Huh? I'm on a 64bit (x86_64) system and my python is 64 bit (I checked that).

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I've read in a thread with a similar problem that Python 3.8 isn't stable:
https://python-forum.io/Thread-ModuleNot...3-8-Alfa-0

I use Python 3.8.2. Maybe that's the problem?