lex_re3.py (310B)
1# lex_token.py 2# 3# Regular expression rule matches empty string 4 5import sys 6sys.path.insert(0,"..") 7 8import ply.lex as lex 9 10tokens = [ 11 "PLUS", 12 "MINUS", 13 "NUMBER", 14 "POUND", 15 ] 16 17t_PLUS = r'\+' 18t_MINUS = r'-' 19t_NUMBER = r'(\d+)' 20t_POUND = r'#' 21 22def t_error(t): 23 pass 24 25import sys 26 27lex.lex() 28 29