Sample for Google Sheets needs additional documentation

[amjadtalib]

I just want to reference this issue #299 and solution provided by @maxrp to silence an error.

Judging by the reactions, I think this would be useful to include in the sample if possible!

[grant]

It looks like that issue recommends:

cache_discovery=False

as an option in the build() command.

Also consider:

import logging
logging.getLogger('googleapiclient.discovery').setLevel(logging.CRITICAL)

[sqrrrl]

Or wait for googleapis/google-api-python-client#325 to be fixed.

[asrivas]

Looks like googleapis/google-api-python-client#325 was fixed