Lambda 函数不能分配给方法

Question

我有一个来自 Google API 的 python 脚本，但是当我运行它时，我得到 error: Cannot assign to a method 的在线状态：

request.get_method = lambda: method

代码块（完整代码：https://cloud.google.com/identity/docs/how-to/create-devices）：

def create_delegated_credentials(user_email):
  credentials = service_account.Credentials.from_service_account_file(
      SA_FILE,
      scopes=['https://www.googleapis.com/auth/cloud-identity.devices'])

  delegated_credentials = credentials.with_subject(user_email)

  return delegated_credentials

request = google.auth.transport.requests.Request()
dc = create_delegated_credentials(ADMIN_EMAIL)
dc.refresh(request)
print('Access token: ' + dc.token + '\n')

header = {...}
body = {...}

serialized_body = json.dumps(body, separators=(',', ':'))

request_url = BASE_URL + 'devices'
print('Request URL: ' + request_url)
print('Request body: ' + serialized_body)

serialized_body = json.dumps(body, separators=(',', ':'))
request = urllib.request.Request(request_url, serialized_body, headers=header)
request.get_method = lambda: 'POST'                                   ############HERE

有人知道如何解决这个问题吗？

Answer 1

而不是修改 Request 对象（mypy 有助于出错，因为通常对函数的赋值是一个错误或 monkeypatch hack），您可以直接在构造中设置 method Request:

request = urllib.request.Request(request_url, serialized_body, headers=header, method='POST')

此参数已添加到 python3.3

Lambda 函数不能分配给方法

Lambda Function Cannot Be Assigned to Method

python

mypy