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Incorrect Regex

  • tusharvyavahare1
     + 0 comments

    python 3 solution

    python added support for possesive quantifiers (*+,++,?+,{ }+) from python 3.11, but the expected outputs are not updated to align with the updated python version. so we need to handle possesive quantifiers separately.

    import re
res="False"
pattern = r'(?:[*+?]|\{\d+(?:,\d*)?\})\+'    # ++,*+,?+,{..}+
for _ in range(int(input())):
    inp=input()
    if re.findall(pattern,inp):
        res="False"
    else:
        try:
            re.compile(inp)
            res="True"
        except re.error as e:
            res="False"
    
    print(res)