Vision API failing on Standard Environment Appengine

Are the cloud vision python clients ready for use on Standard Environment on AppEngine?

Steps as below :

pip install --upgrade google-cloud --target ./lib

Redeployed the project and during the invocation of the API I get the below stacktrace.

    from google.cloud import vision
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/google/cloud/vision/__init__.py", line 21, in <module>
    from google.cloud.vision.client import Client
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/google/cloud/vision/client.py", line 22, in <module>
    from google.cloud.vision._gax import _GAPICVisionAPI
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/google/cloud/vision/_gax.py", line 17, in <module>
    from google.cloud.gapic.vision.v1 import image_annotator_client
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/google/cloud/gapic/vision/v1/image_annotator_client.py", line 31, in <module>
    from google.gax import api_callable
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/google/gax/__init__.py", line 36, in <module>
    import multiprocessing as mp
  File "/base/data/home/apps/s~app-test/20170202t220112.400250114231361871/lib/multiprocessing/__init__.py", line 87, in <module>
    import _multiprocessing
ImportError: dynamic module does not define init function (init_multiprocessing)

The cloud vision python clients seem to be doing fine on a compute engine box.