Python 3.4:

$ ../cpython/./python setup.py sdist upload -r test --show-response
...
...
Traceback (most recent call last):
  File "setup.py", line 24, in <module>
    'License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)',
  File "/home/berker/projects/cpython/Lib/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/home/berker/projects/cpython/Lib/distutils/dist.py", line 930, in run_commands
    self.run_command(cmd)
  File "/home/berker/projects/cpython/Lib/distutils/dist.py", line 949, in run_command
    cmd_obj.run()
  File "/home/berker/projects/cpython/Lib/distutils/command/upload.py", line 65, in run
    self.upload_file(command, pyversion, filename)
  File "/home/berker/projects/cpython/Lib/distutils/command/upload.py", line 165, in upload_file
    body.write(value)
TypeError: 'str' does not support the buffer interface


Python 3.3:

$ python3.3 setup.py sdist upload -r test --show-response
...
...
Traceback (most recent call last):
  File "setup.py", line 24, in <module>
    'License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)',
  File "/usr/local/lib/python3.3/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/usr/local/lib/python3.3/distutils/dist.py", line 917, in run_commands
    self.run_command(cmd)
  File "/usr/local/lib/python3.3/distutils/dist.py", line 936, in run_command
    cmd_obj.run()
  File "/usr/local/lib/python3.3/distutils/command/upload.py", line 66, in run
    self.upload_file(command, pyversion, filename)
  File "/usr/local/lib/python3.3/distutils/command/upload.py", line 155, in upload_file
    body.write(value)
TypeError: 'str' does not support the buffer interface

I also attached my setup.py.