使用 Google 服务帐户 file_cache 的 Python 客户端时出现“ImportError: file_cache is unavailable”

我正在使用具有完全域委托的 G Suite 服务帐户。我有一个对 Google 日历具有只读访问权限的脚本。该脚本工作得很好，但当我“构建”服务时会抛出错误（在后台线程上？）。这是代码：

from oauth2client.service_account import ServiceAccountCredentials
from httplib2 import Http
import urllib
import requests
from apiclient.discovery import build

cal_id = "[email protected] /cdn-cgi/l/email-protection"

scopes                = ['https://www.googleapis.com/auth/calendar.readonly']
credentials           = ServiceAccountCredentials.from_json_keyfile_name('my_cal_key.json', scopes=scopes)
delegated_credentials = credentials.create_delegated('[email protected] /cdn-cgi/l/email-protection')
http_auth             = delegated_credentials.authorize(Http())

# This is the line that throws the error
cal_service  = build('calendar','v3',http=http_auth)

#Then everything continues to work normally
request = cal_service.events().list(calendarId=cal_id)
response = request.execute()

# etc...

抛出的错误是：

WARNING:googleapiclient.discovery_cache:file_cache is unavailable when using oauth2client >= 4.0.0
Traceback (most recent call last):
  File "/Users/myuseraccount/anaconda3/lib/python3.5/site-packages/googleapiclient/discovery_cache/__init__.py", line 36, in autodetect
    from google.appengine.api import memcache
ImportError: No module named 'google'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/myuseraccount/anaconda3/lib/python3.5/site-packages/googleapiclient/discovery_cache/file_cache.py", line 33, in <module>
    from oauth2client.contrib.locked_file import LockedFile
ImportError: No module named 'oauth2client.contrib.locked_file'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/myuseraccount/anaconda3/lib/python3.5/site-packages/googleapiclient/discovery_cache/file_cache.py", line 37, in <module>
    from oauth2client.locked_file import LockedFile
ImportError: No module named 'oauth2client.locked_file'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/myuseraccount/anaconda3/lib/python3.5/site-packages/googleapiclient/discovery_cache/__init__.py", line 41, in autodetect
    from . import file_cache
  File "/Users/myuseraccount/anaconda3/lib/python3.5/site-packages/googleapiclient/discovery_cache/file_cache.py", line 41, in <module>
    'file_cache is unavailable when using oauth2client >= 4.0.0')
ImportError: file_cache is unavailable when using oauth2client >= 4.0.0

这是怎么回事？我可以解决这个问题吗？我尝试过重新安装和/或升级google包裹。

我参加这里的聚会有点晚了，但今天我遇到了类似的问题并找到了答案here https://github.com/google/google-api-python-client/issues/299

仅错误的解决方案：file_cache is unavailable when using oauth2client >= 4.0.0

解决方案：

改变你的discovery.build()拥有领域cache_discovery=False i.e

discovery.build(api, version, http=http, cache_discovery=False)