April 28, 2010
6:44 p.m.
On Wed, Apr 28, 2010 at 5:59 PM, Mathias Panzenböck <grosser.meister.morti@gmx.net> wrote:
See:
map(None,['a','b'],[]) [('a', None), ('b', None)] list(imap(None,['a','b'],[])) []
Why is that? I propose that imap should work like map (except from being a generator, of course).
System Info: Python 2.6.2 (r262:71600, Jan 25 2010, 18:46:47) [GCC 4.4.2 20091222 (Red Hat 4.4.2-20)] on linux2
Practically speaking, Python 2.7 is in beta so even if there was no objection, it's pretty unlikely this lands in 2.x (and 3.x has dropped itertools.imap so there's no confusion). By the way, that's not the only difference of map and itertools.imap:
map(None, 'abc') ['a', 'b', 'c'] list(itertools.imap(None, 'abc')) [('a',), ('b',), ('c',)]
George