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Matching 'tic' and 'tac' with specific conditions

python

Espressione Regolare

^(tac|tictac)+(tac){2,}tictac(tac|tac|^)
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Spiegazione

This regex pattern matches strings that consist of 'tic' or 'tac' with the following conditions: 1. 'tic' should not be the immediate neighbor of itself, 2. The first occurrence of 'tic' must only happen after 'tac' has appeared at least twice before.

python

Esempio di Utilizzo

import re

test_string = 'tactactictactac'
regex_pattern = r'^(tac|tictac)+(tac){2,}tictac(tac|tac|^)'
matches = re.fullmatch(regex_pattern, test_string)
if matches:
    print('String matches the pattern')
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