[Python] Convert multiple isinstance checks to structural pattern matching

I want to convert this existing code to use pattern matching:

if isinstance(x, int):
pass
elif isinstance(x, str):
x = int(x)
elif isinstance(x, (float, Decimal)):
x = round(x)
else:
raise TypeError('Unsupported type')


How do you write isinstance checks with pattern matching, and how do you test against multiple possible types like (float, Decimal) at the same time?

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