import re def Inconsistency(string_1, string_2, string_aim): list_1 = re.findall(string_aim, string_1) list_2 = re.findall(string_aim, string_2) print(list_1, list_2) return True #--------------------------------------------------------------------------------------------------# if Inconsistency('A $B$b is a variable.', 'This $b$B is also a variable, but it\'s not $B$b', r'(\$.){2}') == True: print('Consistency!') else: print('Inconsistency!')