[Python-Dev] bool(iter([])) changed between 2.3 and 2.4 (original) (raw)

Guido van Rossum guido at python.org
Thu Sep 22 05:14:12 CEST 2005

On 9/21/05, Raymond Hettinger <raymond.hettinger at verizon.net> wrote:

[Guido van Rossum] > Could you at least admit that this was an oversight and not try to > pretend it was intentional breakage?

Absolutely. I completely missed this one.

Thanks; spoken like a man.

I strongly feel that this needs to be corrected in 2.5. Iterators should have neither len nor nonzero. I see mostly agreement that this is a misfeature. We don't really want to start writing code like this:

while it: x = it.next() ...process x...

when we can already write it like this:

for x in it: ...process x...

do we?

Keeping a special API to allow a more efficient implementation of reversed is fine.

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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