Consistent IO with Python 2 and Python 3

[ogrisel]

It seems that it's not possible to save a file when rodeo is run with Python 3.4 at the moment:

Traceback (most recent call last):
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/ogrisel/venvs/py34/lib/python3.4/site-packages/rodeo/rodeo.py", line 60, in save_file
    f.write(request.form['source'])
TypeError: 'str' does not support the buffer interface

To make the code behave consistently under both Python 2 and Python 3, it would be neat to be able to use the http://python-future.org:

http://python-future.org/compatible_idioms.html#strings-and-bytes
http://python-future.org/what_else.html#open

WDYT? Would you accept pull request that would make the future package a dependency for the rodeo project?

[glamp]

blast. my bad on this one. i haven't done much testing w/ python3 yet apart from the "will it install" test.

WDYT? Would you accept pull request that would make the future package a dependency for the rodeo project?

absolutely! that would be awesome.

[stonebig]

isn't this issue corrected now, shouldn't it be closed ?