Em p_compiler

[alexsilva]

VERSÃO DO PYTHON:
Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)] on win32

Tentar executar o módulo "p_compiler" através da função "main" resulta no seguinte erro:

C:\Python27\python.exe C:/Users/alex/PycharmProjects/ptpy/ptpy/p_compiler.py
WARNING: 'p_ast' not defined as a function
WARNING: 'p_lexer' not defined as a function
ERROR: C:\Users\alex\PycharmProjects\ptpy\ptpy\p_parser.py:262: Symbol 'DEFINE' used, but not defined as a token or a rule
ERROR: C:\Users\alex\PycharmProjects\ptpy\ptpy\p_parser.py:263: Symbol 'DEFINE' used, but not defined as a token or a rule
WARNING: Token 'RETURN' defined, but not used
WARNING: Token 'RAISE' defined, but not used
WARNING: Token 'GLOBAL' defined, but not used
WARNING: Token 'DEL' defined, but not used
WARNING: Token 'PRINT' defined, but not used
WARNING: Token 'DEF' defined, but not used
WARNING: Token 'EXCEPT' defined, but not used
WARNING: Token 'IMPORT' defined, but not used
WARNING: Token 'CLASS' defined, but not used
WARNING: Token 'WS' defined, but not used
WARNING: Token 'TRY' defined, but not used
WARNING: Token 'FINALLY' defined, but not used
WARNING: Token 'FROM' defined, but not used
WARNING: Token 'LAMBDA' defined, but not used
WARNING: There are 14 unused tokens
ERROR: Infinite recursion detected for symbol 'define_stmt'
Traceback (most recent call last):
File "C:/Users/alex/PycharmProjects/ptpy/ptpy/p_compiler.py", line 191, in
main()
File "C:/Users/alex/PycharmProjects/ptpy/ptpy/p_compiler.py", line 176, in main
compiler = PtpyCompiler()
File "C:/Users/alex/PycharmProjects/ptpy/ptpy/p_compiler.py", line 162, in init
self.parser = ptpyparser.PtpyParser()
File "C:\Users\alex\PycharmProjects\ptpy\ptpy\p_parser.py", line 704, in init
self._parser = yacc.yacc()
File "C:\Python27\lib\site-packages\ply\yacc.py", line 3214, in yacc
raise YaccError("Unable to build parser")
ply.yacc.YaccError: Unable to build parser

Process finished with exit code 1

Edit:
Tentar executar o pacote de testes(já fixado), resulta no mesmo erro.