TypeError: sequence item 0: expected str instance, bytes found

[erickoledadevrel]

Getting the following error in Python 3.4:

Traceback (most recent call last):
File "gmail.py", line 71, in
main()
File "gmail.py", line 59, in main
results = service.users().labels().list(userId='me').execute()
File "/usr/local/lib/python3.4/dist-packages/oauth2client/util.py", line 142, in positional_wrapper
return wrapped(_args, *_kwargs)
File "/usr/local/lib/python3.4/dist-packages/googleapiclient/http.py", line 722, in execute
body=self.body, headers=self.headers)
File "/usr/local/lib/python3.4/dist-packages/oauth2client/client.py", line 589, in new_request
redirections, connection_type)
File "/usr/lib/python3/dist-packages/httplib2/init.py", line 1120, in request
headers = self._normalize_headers(headers)
File "/usr/lib/python3/dist-packages/httplib2/init.py", line 1088, in _normalize_headers
return _normalize_headers(headers)
File "/usr/lib/python3/dist-packages/httplib2/init.py", line 194, in _normalize_headers
return dict([ (key.lower(), NORMALIZE_SPACE.sub(value, ' ').strip()) for (key, value) in headers.items()])
File "/usr/lib/python3/dist-packages/httplib2/init.py", line 194, in
return dict([ (key.lower(), NORMALIZE_SPACE.sub(value, ' ').strip()) for (key, value) in headers.items()])
TypeError: sequence item 0: expected str instance, bytes found

This was determined to be a bug in httplib2, and fixed by:

jcgregorio/httplib2#291

Although oauth2client has been updated to depend on the latest httplib2 (0.9.1), google-api-python-client still depends on httplib2>=0.8 and oauth2client>=1.4.6, and hence a naive install of the library will not include that fix.

To fix this issue either http2lib or oauth2client (or both) should be updated to use newer versions.

[tseaver]

Fixed in 6394b66.