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

[Stephen J. Turnbull]

Greg Ewing writes:

 > If you're choosing a compression method, it makes sense
 > to choose 'zip', 'gzip', or 'bzip2', but less sense to
 > choose 'hex' or 'base64',

Doesn't "consenting adults" cover choosing a nonsensical compressor?
Do you really think that .transform clients will really choose
'base64' when they want 'lzma'?  If so, why isn't

    if compression_method not in ['zip', 'lzma']:
        raise PEBKAC_Error

sufficient protection?

 > and even less 'utf8' or 'latin1'.

These will fail the typing tests, since they are string->bytes, not
bytes->bytes.  These tests will be necessary, which could be
considered an argument against the flat namespace.