→ pip3 list | grep google
google-api-core               1.13.0   
google-auth                   1.5.1    
google-cloud-bigquery         1.17.0   
google-cloud-core             1.0.2    
google-cloud-storage          1.13.0   
google-resumable-media        0.3.1    
googleapis-common-protos      1.5.5

Traceback (most recent call last):
  File "zero/mp-118.py", line 1, in <module>
    from google.cloud import bigquery
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/__init__.py", line 35, in <module>
    from google.cloud.bigquery.client import Client
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/client.py", line 53, in <module>
    from google.cloud.bigquery.dataset import Dataset
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/dataset.py", line 24, in <module>
    from google.cloud.bigquery.model import ModelReference
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery/model.py", line 27, in <module>
    from google.cloud.bigquery_v2 import types
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery_v2/__init__.py", line 23, in <module>
    from google.cloud.bigquery_v2 import types
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery_v2/types.py", line 23, in <module>
    from google.cloud.bigquery_v2.proto import model_pb2
  File "/usr/local/lib/python3.7/site-packages/google/cloud/bigquery_v2/proto/model_pb2.py", line 28, in <module>
    from google.api import client_pb2 as google_dot_api_dot_client__pb2
ImportError: cannot import name 'client_pb2' from 'google.api' (/usr/local/lib/python3.7/site-packages/google/api/__init__.py)