Author bennorth
Recipients bennorth
Date 2009-02-09.13:59:17
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The functools module includes a 'partial' class, which allows partial
function application either by positional arguments or keyword
arguments.  However, it cannot be used to create, for example, a
function splitting a string on commas, or a function to extracts logs to
base 10.  I posted

which suggested a 'partial_right' feature, such that the following would

   >>> import functools, math

   >>> split_comma = functools.partial_right(str.split, ',')
   >>> split_comma('a,b,c')
   ['a', 'b', 'c']

   >>> log_10 = functools.partial_right(math.log, 10.0)
   >>> log_10(100.0)

There was some useful discussion, but generally the feeling was that the
extra complexity outweighed the potential benefits.  Also, chained
partial applications were troublesome.

The overlap in functionality between 'partial_right' and an existing
patch (#1706256) to allow skipping of positional arguments was raised.

I think the present issue should probably be closed/rejected, but it was
suggested on the mailing list that having the issue and patch on the
record might be useful.  Patches are against 2.6.1 source.
Date User Action Args
2009-02-09 13:59:20bennorthsetrecipients: + bennorth
2009-02-09 13:59:20bennorthsetmessageid: <>
2009-02-09 13:59:18bennorthlinkissue5191 messages
2009-02-09 13:59:17bennorthcreate