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I signed CLA.

CLAs look good, thanks!

Thanks for catching this! I think a better solution would be to just use that variable, and SAMPLE_SPREADSHEET_ID, directly:

result = service.spreadsheets().values().get(spreadsheetId=SAMPLE_SPREADSHEET_ID,
                                             range=SAMPLE_RANGE_NAME).execute()

Thanks for the review. Fixed the PR and rebased the branch. Besides, I included not only SAMPLE_RANGE_NAME but also SAMPLE_SPREADSHEET_ID. It is ready to review again now.

pylint check does not pass. Fixing.

OK. Ready to review now! Thanks!