Mailman 3 Any reason that any()/all() do not take a predicate argument? - Python-Dev

13 Apr 2006

      Hi,

sorry if this came up before, but I tried searching the archives and
found nothing.  It would be really nice if new builtin truth functions
in 2.5 took a predicate argument(defaults to bool), so one could
write, for example:

seq = [1,2,3,4,5]
if any(seq, lambda x: x==5):
...

which is clearly more readable than

reduce(seq, lambda x,y: x or y==5, False)

IIRC, something like that is called junctions in Perl 6.

Any reason that any()/all() do not take a predicate argument?

Mikhail Glushenkov

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