gmail API：ModuleNotFoundError：没有名为“google”的模块

Question

While running the quickstart.py of Gmail, I get the following error on macOS.

Traceback (most recent call last):
  File "quickstart.py", line 4, in <module>
    from googleapiclient.discovery import build
  File "/Users/<user>/Documents/venv/bin/googleapiclient/discovery.py", line 49, in <module>
    import google.api_core.client_options
ModuleNotFoundError: No module named 'google'

These are the installed Google libraries.

$ pip freeze | grep google
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
google-api-core==1.16.0
google-api-python-client==1.8.0
google-auth==1.12.0
google-auth-httplib2==0.0.3
google-auth-oauthlib==0.4.1
google-cloud-bigquery==1.24.0
google-cloud-core==1.3.0
google-resumable-media==0.5.0
googleapis-common-protos==1.51.0

Answer 1

From the error, the google module is not installed for Python3. I'm gonna take a wild guess and say it's because your version of Python(Python2.7) has depreciated, clearly, try using python3.7(alongside pip3) hopefully it'll work.

Answer 2

I think you should run

 pip install google-cloud

If the issue persist then you have some issues with you python paths.

You should check where the google package actually is installed:

 python3 -c 'import google; print(google.__file__)'

Also you can try to install your packages in a virtualenv:

virtualenv venv
source venv/bin/activate
venv/bin/pip install your-packages
venv/bin/python -c 'import google'
deactivate
rm -fr venv/

Answer 3

The library google-api-core 1.16.0 is no longer supported in Python 2.7. Only versions above 3.5 are supported, as specified here :

Supported Python Versions : Python >= 3.5

Deprecated Python Versions : Python == 2.7. Python 2.7 support will be removed on January 1, 2020.

You should upgrade to a supported Python version.

Reference:

• google-api-core 1.16.0