# lex_re1.py # # Bad regular expression in a string import sys if ".." not in sys.path: sys.path.insert(0,"..") import ply.lex as lex tokens = [ "PLUS", "MINUS", "NUMBER", ] t_PLUS = r'\+' t_MINUS = r'-' t_NUMBER = r'(\d+' def t_error(t): pass lex.lex()