docker_image_.py 文件源码

def exists(self):
    try:
      manifest = json.loads(self.manifest(validate=False))
      return (manifest['schemaVersion'] == 2 and
              'layers' in manifest and
              self.media_type() in self._accepted_mimes)
    except docker_http.V2DiagnosticException as err:
      if err.status == httplib.NOT_FOUND:
        return False
      raise