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

Fri May 16 17:58:31 CEST 2008

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