google-cloud-python: Fail to import ServiceAccountCredentials within GAE endpoint tool

I am generating some GAE endpoints library. When running endpoints tool(endpointscfg.py get_client_lib ... ), gcloud import fails. Third party libraries are bundled with GAE project, and oauth2client-2.0.1 is actually exists in library directory.

Affecting versions: 0.10 and above

Traceback (most recent call last):
  File "/usr/local/bin/endpointscfg.py", line 133, in <module>
    run_file(__file__, globals())
  File "/usr/local/bin/endpointscfg.py", line 129, in run_file
    execfile(_PATHS.script_file(script_name), globals_)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/endpointscfg.py", line 561, in <module>
    main(sys.argv)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/endpointscfg.py", line 557, in main
    args.callback(args)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/endpointscfg.py", line 426, in _GetClientLibCallback
    hostname=args.hostname, application_path=args.application)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/endpointscfg.py", line 388, in _GetClientLib
    application_path=application_path)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/endpointscfg.py", line 187, in GenApiConfig
    module = __import__(module_name, fromlist=base_service_class_name)
  File "/Users/kang/jackend/main.py", line 10, in <module>
    from auth.services import JackEndAuthAPI
  File "/Users/kang/jackend/auth/services.py", line 12, in <module>
    from . import (
  File "/Users/kang/jackend/auth/storage.py", line 9, in <module>
    from ext import cloudstorage as storage
  File "/Users/kang/jackend/ext/cloudstorage.py", line 9, in <module>
    from gcloud import (
  File "/Users/kang/jackend/lib/gcloud/storage/__init__.py", line 45, in <module>
    from gcloud.storage.client import Client
  File "/Users/kang/jackend/lib/gcloud/storage/client.py", line 19, in <module>
    from gcloud.client import JSONClient
  File "/Users/kang/jackend/lib/gcloud/client.py", line 17, in <module>
    from oauth2client.service_account import ServiceAccountCredentials
ImportError: cannot import name ServiceAccountCredentials

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 22 (10 by maintainers)

Most upvoted comments

My appengine_config.py looks like this now:

"""
`appengine_config.py` is automatically loaded when Google App Engine
starts a new instance of your application. This runs before any
WSGI applications specified in app.yaml are loaded.
"""

import sys
from google.appengine.ext import vendor

# Third-party libraries are stored in "lib", vendoring will make
# sure that they are importable by the application.
vendor.add('lib')

def unload_module(module_name):
    target_modules = [m for m in sys.modules if m.startswith(module_name)]
    for m in target_modules:
        if m in sys.modules:
            del sys.modules[m]

unload_module('oauth2client')
unload_module('pyasn1_modules')

This workaround would be useful for swapping GAE provided libraries.

ghost on Apr 14, 2016

Great.

The long and short is that app engine is barrels of fun when it comes to user-provided newer versions of bundled libraries.

theacodes on Apr 14, 2016

I’m guessing that maybe App Engine provides a different version of oauth2client somehow?

Can you add a line in your code that does:

import oauth2client
print oauth2client.__version__

It should show '2.0.1' if you’re using the one in the library directory. (the variable is defined here: https://github.com/google/oauth2client/blob/master/oauth2client/__init__.py)

jgeewax on Apr 8, 2016