[Python-Dev] transform() and untransform() methods, and the codec registry (original) (raw)

Alexander Belopolsky alexander.belopolsky at gmail.com
Thu Dec 9 19:55:08 CET 2010


On Thu, Dec 9, 2010 at 1:42 PM, Guido van Rossum <guido at python.org> wrote: ..

string-string transforms use the same namespace even though the typical transform only supports one or the other. E.g. IMO all of the following should raise LookupError:

b'abc'.transform('rot13') Traceback (most recent call last): ..  return (input.translate(rot13map), len(input)) TypeError: expected an object with the buffer interface

This is actually very misleading because

'abc'.transform('rot13') 'nop'

works even though 'abc' is not "an object with the buffer interface".

memoryview('abc') Traceback (most recent call last): .. TypeError: cannot make memory view because object does not have the buffer interface



More information about the Python-Dev mailing list