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# lex_re2.py
#
# Regular expression rule matches empty 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()
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