yacc.py 文件源码

def read_pickle(self,filename):
        try:
            import cPickle as pickle
        except ImportError:
            import pickle

        in_f = open(filename,"rb")

        tabversion = pickle.load(in_f)
        if tabversion != __tabversion__:
            raise VersionError("yacc table file version is out of date")
        self.lr_method = pickle.load(in_f)
        signature      = pickle.load(in_f)
        self.lr_action = pickle.load(in_f)
        self.lr_goto   = pickle.load(in_f)
        productions    = pickle.load(in_f)

        self.lr_productions = []
        for p in productions:
            self.lr_productions.append(MiniProduction(*p))

        in_f.close()
        return signature

    # Bind all production function names to callable objects in pdict