On Sep 5, 2005, at 12:39 AM, Stuart Bishop wrote:
Benji York wrote:
Stuart Bishop wrote:
If this is a way of saying "I'm iterable, but I don't want to
tell you
how
long I am"
Right.
shouldn't an exeption be raised? Otherwise 'for i in
range(0,len(source)):
foo = source[i]' could start
On 9/5/05, Tim Peters <[EMAIL PROTECTED]> wrote:
> Not me. Googling on
>
> site:mail.python.org maxint __len__ guido
>
> finds 9 hits, all irrelevant. There's no instance of returning
> sys.maxint from a __len__ method in the Python codebase; there are
> instances of returning small consta
[Fred Drake, on returning sys.maxint from __len__ if you don't know
the length, which Tim strongly advises against]
> Interesting. I seem to remember this coming from Guido several times
> in discussions.
Not me. Googling on
site:mail.python.org maxint __len__ guido
finds 9 hits, all irr
On 9/5/05, Tim Peters <[EMAIL PROTECTED]> wrote:
> I haven't heard that recommendation before, and strongly advise
> against it. The result returned by __len__() is often used as a hint
> internally, to preallocate result space. This is exactly what the
Interesting. I seem to remember this comi
[Fred Drake]
> That's not so weird at all; this is how __len__() is generally used in
> Python. sys.maxint is the recommended value to return if the sequence
> length is undetermined
I haven't heard that recommendation before, and strongly advise
against it. The result returned by __len__() is o
On 9/5/05, Stuart Bishop <[EMAIL PROTECTED]> wrote:
> Urgh... I hadn't noticed that in vocabularies before. I believe this has
> other side effects too, such as if I do list(mysource), Python calls
> mysource.__len__ (if it exists) to preallocate the list size. Wierd things
> can happen if your cla
Benji York wrote:
> Stuart Bishop wrote:
>
>> If this is a way of saying "I'm iterable, but I don't want to tell you
>> how
>> long I am"
>
>
> Right.
>
>> shouldn't an exeption be raised? Otherwise 'for i in
>> range(0,len(source)):
>> foo = source[i]' could start blowing up if the source cha
