In which file did you encounter the issue?

GoogleCloudPlatform/python-docs-samples/spanner/cloud-client/bulk_load_csv/batch_import.py

Did you change the file? If so, how?

no

Describe the issue

Line 76,77

comments_file = 'hnewscomments.txt'
stories_file = 'hnewsstories.txt'

It should be ".csv" instead of ".txt"