改pgen.py

class ParserGenerator(object):
    def __init__(self, grammar_file, token_file, verbose=False, graph_file=None):
        with open(grammar_file,encoding='gbk') as f:

改成gbk.
上面是改pgen.py
这里是build.py:

def build_parser(
    grammar_file: str, verbose_tokenizer: bool = False, verbose_parser: bool = False
) -> Tuple[Grammar, Parser, Tokenizer]:
    with open(grammar_file,encoding='gbk') as file:

同样加一句gbk.