[Python-Dev] Re: PEP 279

2002年3月29日 09:01:11 +0100

Raymond Hettinger wrote:
> I like itercount() or enumerate(). The reason is that this
> function can work with any iterable including those that
> do not have numeric indices (such as dictionaries).
> Counting or enumeration is what is really happening.

But the *reason* for this proposal is to turn this idiom:
 for i in range(len(seq)):
 element = seq[i]
 ...
into this:
 for i, element in enumerate(seq):
 ...
It's hardly useful for types that don't have numeric indices, so the fact that
it _does_ work with any iterator seems almost an implementation detail.
I quite like the name enumerate. Hate itercount. I'm neutral on indexed.
Just