PLY Lex INT or FLOAT Correctly!

gistfile1.py

    # Have to start with a general numeric token to avoid PLY lexing problems
    r_NUM_CONST = r'[0-9]*\.?[0-9]+((E|e)(\+|-)?[0-9]+)?'

    @Token(r_NUM_CONST)
    def t_NUM_CONST(self, token):
        try:
            token.value = int(token.value)
            token.type = 'INT_CONST'
            return token
        except ValueError:
            pass

        try:
            token.value = float(token.value)
            token.type = 'FLOAT_CONST'
            return token
        except ValueError:
            pass

        self.t_error("Not INT or FLOAT: " + token.value)