Boto: upload to Amazon S3 OK, but upload to Google Cloud Storage: 'str' does not support the buffer interface -


i using exact codes upload files amazon s3 , google cloud storage, respectively, using boto:

import boto  filename = 'abc.png' filenamewithpath = os.path.dirname(os.path.realpath(__file__)) + '/' + filename cloudfilename = 'uploads/' + filename  # upload amazon s3 conn = boto.connect_s3(aws_access_key_id=aws_access_key, aws_secret_access_key=aws_secret_key) bucket = conn.get_bucket(aws_bucket_name) fpic = boto.s3.key.key(bucket) fpic.key = cloudfilename fpic.set_contents_from_filename(filenamewithpath)  # upload google cloud storage conn = boto.connect_gs(gs_access_key_id=gs_access_key, gs_secret_access_key=gs_secret_key) bucket = conn.get_bucket(gs_bucket_name) fpic = boto.s3.key.key(bucket) fpic.key = cloudfilename fpic.set_contents_from_filename(filenamewithpath)

the amazon s3 part of code runs perfectly. however, google cloud storage part gives error message typeerror, 'str' not support buffer interface @ statement fpic.set_contents_from_filename(...).

what problem?

request method: post request url: http://localhost:8000/upload/  traceback: file "<folder of virtual environ>/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response   132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs) file "<folder of project>/upload/views.py" in upload   59.         fpic.set_contents_from_filename(filenamewithpath) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/key.py" in set_contents_from_filename   1362.                                                encrypt_key=encrypt_key) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/key.py" in set_contents_from_file   1293.                            chunked_transfer=chunked_transfer, size=size) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/key.py" in send_file   750.                                  chunked_transfer=chunked_transfer, size=size) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/key.py" in _send_file_internal   951.             query_args=query_args file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/connection.py" in make_request   664.             retry_handler=retry_handler file "<folder of virtual environ>/lib/python3.4/site-packages/boto/connection.py" in make_request   1071.                           retry_handler=retry_handler) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/connection.py" in _mexe   940.                                       request.body, request.headers) file "<folder of virtual environ>/lib/python3.4/site-packages/boto/s3/key.py" in sender   840.                     http_conn.send('%x;\r\n' % chunk_len) file "/usr/lib/python3.4/http/client.py" in send   876.                     self.sock.sendall(d) file "/usr/lib/python3.4/ssl.py" in sendall   718.                 v = self.send(data[count:]) file "/usr/lib/python3.4/ssl.py" in send   679.                 v = self._sslobj.write(data)  exception type: typeerror @ /upload/ exception value: 'str' not support buffer interface

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