当使用Python client for Google service account file_cach时，“ImportError:file_cache不可用”

Question

我正在使用G套件的服务帐户和完全域委派。我有一个对谷歌日历只读访问的脚本。脚本运行得很好，但是抛出了一个错误（在后台线程上？）当我“建立”服务时。代码如下：

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

cal_id = "my_calendar_id@group.calendar.google.com"

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('me@mydomain.com')
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...

引发的错误是：

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，这是我能修好的吗？我试过重新安装和/或升级google包。

Answer 1

“googleapipythonclient”模块的代码负责人说。。。

install_requires = [
     'httplib2>=0.9.2,<1dev',
     'oauth2client>=1.5.0,<5.0.0dev',    <<=============
     'six>=1.6.1,<2dev',
     'uritemplate>=3.0.0,<4dev',
]

所以，我已经卸载了oauth2client版本4.0.0

然后，我从正式的python站点https://pypi.python.org/pypi/oauth2client/1.5.2下载了tar.gz文件中的oauth2client 1.5.2

我已经安装了这个下载的文件，所以我有1.5.2版本的oauth2client

Package                  Version
------------------------ ---------
certifi                  2016.9.26
discovery                0.0.4
distribute               0.7.3
future                   0.16.0
google-api-python-client 1.5.5
httplib2                 0.9.2
oauth2client             1.5.2
pefile                   2016.3.28
pip                      9.0.1
pyasn1                   0.1.9
pyasn1-modules           0.0.8
PyInstaller              3.2
pypiwin32                219
requests                 2.11.1
rsa                      3.4.2
setuptools               28.8.0
six                      1.10.0
uritemplate              3.0.0

之后，一切又恢复正常，没有任何警告信息。