As others have stated, Python 3.10 is not currently compatible with Matplotlib. You need to install and use Python 3.9 until it is supported. Until then you have a few options: Windows You can use the Python Launcher for Windows (py.exe) script to choose which Python version to run like so: py.exe script help: py … Read more
Cause of the problem A variable name in a case clause is treated as a name capture pattern. It always matches and tries to make an assignment to the variable name. This is almost certainly not what was intended. Because the first matching case wins and because case OKAY always matches, the other case clauses … Read more
If the constant you’re testing against is a dotted name, then it should be treated as a constant instead of as the name of the variable to put the capture in (see PEP 636 # Matching against constants and enums): class Codes: SUCCESS = 200 NOT_FOUND = 404 def handle(retcode): match retcode: case Codes.SUCCESS: print(‘success’) … Read more
If on Windows, numpy has not yet released a precompiled wheel for Python 3.10. However you can try the unofficial wheels available at https://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy . Specifically look for numpy‑1.21.2+mkl‑cp310‑cp310‑win_amd64.whl or numpy‑1.21.2+mkl‑cp310‑cp310‑win32.whl depending on you system architecture. After downloading the file go to the download directory and run pip install “<filename>.whl”.) (I have personally installed numpy‑1.21.2+mkl‑cp310‑cp310‑win_amd64.whl … Read more