code: def upload_asset(self, content_type, name, asset):
          
          headers = Release.CUSTOM_HEADERS.copy()
          headers.update({'Content-Type': content_type})
          url = self.upload_urlt.expand({'name': name})
          r = self._post(url, data=asset, json=False, headers=headers,
                         verify=False)
          if r.status_code in (201, 202):
              return Asset(r.json(), self)
          raise GitHubError(r)
docs: Upload an asset to this release.
  
          All parameters are required.
  
          :param str content_type: The content type of the asset. Wikipedia has
              a list of common media types
          :param str name: The name of the file
          :param asset: The file or bytes object to upload.
          :returns: :class:`Asset <Asset>`