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  1. Prepare
  2. Python
  3. Errors and Exceptions
  4. Incorrect Regex
  5. Discussions

Incorrect Regex

  • sumaiya_alsameer
     + 0 comments

    Try Like this

    import re

    T = int(input()) invalid_repeats = ['++', '**', '??', '+', '+', '?', '?', '+?', '??']

    for _ in range(T): S = input().strip()

    # Basic invalid pattern check
is_invalid = any(rep in S for rep in invalid_repeats)

if is_invalid:
    print("False")
    continue

try:
    re.compile(S)
    print("True")
except re.error:
    print("False")