config.py 文件源码

def _parse_version(self, value):
        """Parses `version` option value.

        :param value:
        :rtype: str

        """
        version = self._parse_attr(value)

        if callable(version):
            version = version()

        if not isinstance(version, string_types):
            if hasattr(version, '__iter__'):
                version = '.'.join(map(str, version))
            else:
                version = '%s' % version

        return version