parser, lexer の参照

#!/usr/bin/env python

import ply.lex as lex

tokens = (
  'A',
  'B',
  'C',
)

def t_A(t):
    r'A'
    print t.lexer
    return t

t_B = r'B'
t_C = r'C'
t_ignore = " \t"

def t_error(t):
    print "Illegal character '%s'" % t.value[0]
    t.lexer.skip(1)

lex.lex()


import ply.yacc as yacc

def p_input(p):
    'input : A B C'
    print p.parser
    print p.lexer

def p_error(p):
    print "Syntax error at '%s'" % p.value

yacc.yacc()

while 1:
    try:
        s = raw_input('input > ')
    except EOFError:
        break
    if not s: continue
    yacc.parse(s)

で、

input > A B C
<ply.lex.Lexer instance at 0x4022064c>
<ply.yacc.Parser instance at 0x40243fac>
<ply.lex.Lexer instance at 0x4022064c>