[Patches] urllib: POST with arbitrary mime type

[Guido van Rossum]

One suggestion -- rather than testing for type(data)==type(''),
wouldn't it be better to test for isinstance(data, RequestBody)?
Also, it seems that your Form class is broken.  It passes a dict as
the body argument the the base class constructor, but it is later used
as a string.

I suggest that you test this one more extensively.  Perhaps add some
testcases to test_urllib.py?

--Guido van Rossum (home page: http://www.python.org/~guido/)