Timeout in AuthorizedSession causes TypeError: unsupported operand type(s) for -: 'tuple' and 'float'

[busunkim96]

Reported in #403, but was also noticed in other logs for team tools. They were all using google-cloud-storage, although that may be a coincidence

#397 (release PR #399) was rolled back in #401 (release PR #402)

1119 /usr/local/lib/python3.7/site-packages/nlu/bucket_utils.py:23: in load_item
1120     pickled_cache_string = blob.download_as_string()
1121 /usr/local/lib/python3.7/site-packages/google/cloud/storage/blob.py:802: in download_as_string
1122     raw_download=raw_download,
1123 /usr/local/lib/python3.7/site-packages/google/cloud/storage/blob.py:719: in download_to_file
1124     transport, file_obj, download_url, headers, start, end, raw_download
1125 /usr/local/lib/python3.7/site-packages/google/cloud/storage/blob.py:643: in _do_download
1126     download.consume(transport)
1127 /usr/local/lib/python3.7/site-packages/google/resumable_media/requests/download.py:151: in consume
1128     result = _helpers.http_request(transport, method, url, **request_kwargs)
1129 /usr/local/lib/python3.7/site-packages/google/resumable_media/requests/_helpers.py:136: in http_request
1130     return _helpers.wait_and_retry(func, RequestsMixin._get_status_code, retry_strategy)
1131 /usr/local/lib/python3.7/site-packages/google/resumable_media/_helpers.py:150: in wait_and_retry
1132     response = func()
1133 /usr/local/lib/python3.7/site-packages/google/auth/transport/requests.py:252: in request
1134     self.credentials.before_request(auth_request, method, url, request_headers)
1135 /usr/local/lib/python3.7/site-packages/google/auth/transport/requests.py:89: in __exit__
1136     self.remaining_timeout = self._timeout - elapsed
1137 E   TypeError: unsupported operand type(s) for -: 'tuple' and 'float'

[jasonjanofsky]

Saw this as well, it looks like that self._timeout doesn't come out as a float but, instead is a tuple. Spent the last hour figuring this out. Thanks for clearing this out @busunkim96.

[plamut]

Closing, as the change that introduced the bug was reverted in #401.

(will re-submit the change with the logic handling tuples, too)