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form list of filename get the filename with highest num pythn

import re
list_of_files = ["file1","file100","file4","file7"]

def extract_number(f):
    s = re.findall("d+$",f)
    return (int(s[0]) if s else -1,f)

print(max(list_of_files,key=extract_number))

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form list of filename get the filename with highest num pythn

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