def __call__(self, environ, start_response):
    if environ['REQUEST_METHOD'] != 'GET':
      start_response('405 %s' % httplib.responses[405], [])
      return []
    try:
      return self.serve_image(environ, start_response)
    except InvalidRequestError:
      start_response(httplib.responses[400] % '400 %s', [])
      return []
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/devappserver2/blob_image.py/Application.__call__/swapped operands of `%`