Python String replace based on chars NOT in RegEx -

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is possible create reqex finds characters not specific set?

rather blacklisting bunch of characters , replacing them, easier me allow set , replace characters not in set.

my set looks this: [.a-za-z0-9]

i this:

clean_filename = re.sub(r'([.a-za-z0-9])', "_", filename)

obviously code replace characters want keep, there way replace characters not in set?

yes, use ^ negation "modifier": r'[^.a-za-z0-9]'


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