wheel.py 文件源码

def metadata(self):
        pathname = os.path.join(self.dirname, self.filename)
        name_ver = '%s-%s' % (self.name, self.version)
        info_dir = '%s.dist-info' % name_ver
        wrapper = codecs.getreader('utf-8')
        with ZipFile(pathname, 'r') as zf:
            wheel_metadata = self.get_wheel_metadata(zf)
            wv = wheel_metadata['Wheel-Version'].split('.', 1)
            file_version = tuple([int(i) for i in wv])
            if file_version < (1, 1):
                fn = 'METADATA'
            else:
                fn = METADATA_FILENAME
            try:
                metadata_filename = posixpath.join(info_dir, fn)
                with zf.open(metadata_filename) as bf:
                    wf = wrapper(bf)
                    result = Metadata(fileobj=wf)
            except KeyError:
                raise ValueError('Invalid wheel, because %s is '
                                 'missing' % fn)
        return result