[Python-3000] PEP 3138- String representation in Python 3000

[Joel Bender]

I wrote:

> ...and it doesn't have to be reflexive if that...

Umm, that should have said 'have an inverse', which is different than 
reflexive or symmetric.  I get a little lost on 'surjective' and 
'injective', having been taught the terms 'onto' and 'one-to-one'.  But 
I digress.

For wrapping a file-like object, I would prefer a TransformIO class that 
takes read and write transform functions, e.g.,

     f = TransformIO(open('data.txt')
             , read=ebcdic_to_plaintext
             , write=plaintext_to_ebcdic
             )

These parameters would be optional, so if 'write' was omitted then write 
attempts would fail, likewise for 'read'.  Using functools.partial could 
be used to provide common transforms:

     ISO_8859_1_Transform = functools.partial( TransformIO
                      , read=ISO_8859_1_Decode
                      , write=ISO_8859_1_Encode
                      )

Where the to/from plain text is implicit.  And no, I'm not a huge fan of 
underbars.


Joel