python speech_streaming.py

D0712 23:18:44.320062112 2197 ev_posix.c:101] Using polling engine: poll
Traceback (most recent call last):
File "speech_streaming.py", line 147, in
main()
File "speech_streaming.py", line 139, in main
service.Recognize(request_stream(stop_audio), DEADLINE_SECS))
File "/usr/local/lib/python2.7/dist-packages/grpc/beta/_client_adaptations.py", line 539, in getattr
raise AttributeError('_DynamicStub object has no attribute "%s"!' % attr)
AttributeError: _DynamicStub object has no attribute "Recognize"!

The REST based speech sample scripts are running fine.

pip list - shows all the required tools and dependencies installed.