Python 3.9 and higher supported

[stefano2734]

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python 3.6 not in Security support https://devguide.python.org/versions/

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Update to python 3.9 or higher (3.8 is out of live), 3.10 to 3.12 are in security support and some bugfix only. 3.10 to 3.12 have some great acceleration in some functions.

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