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      1 # lex_rule1.py
      2 #
      3 # Rule function with incorrect number of arguments
      4 
      5 import sys
      6 if ".." not in sys.path: sys.path.insert(0,"..")
      7 
      8 import ply.lex as lex
      9 
     10 tokens = [
     11     "PLUS",
     12     "MINUS",
     13     "NUMBER",
     14     ]
     15 
     16 t_PLUS = r'\+'
     17 t_MINUS = r'-'
     18 t_NUMBER = 1
     19 
     20 def t_error(t):
     21     pass
     22 
     23 
     24 
     25 lex.lex()
     26 
     27 
     28