config.py 文件源码

def save_yaml(self, filename: str=None):
        """
        Serialize the hierarchy to a file.

        :param filename: Target filename, autogenerated if None
        """
        if filename is None:
            filename = self.config_filename

        with tempfile.NamedTemporaryFile('w', dir=os.path.dirname(filename),
                                         delete=False) as temp:
            header = self._yaml_header()
            if header is not None:
                temp.write(header)
            yaml.round_trip_dump(self, stream=temp)
            tempname = temp.name
        os.rename(tempname, filename)

        if filename in self.__class__._yaml_cache:
            del self.__class__._yaml_cache[filename]


# YAML library configuration