[Python-ideas] proposed methods: list.replace / list.indices

[David Kreuter]

On Sun, Dec 30, 2012 at 5:58 PM, MRAB <python at mrabarnett.plus.com> wrote:

> On 2012-12-30 16:00, Ned Batchelder wrote:
>>
>> I don't understand the conflict?  .replace() from sequence does
>> precisely the same thing as .replace() from bytes if you limit the
>> arguments to single-byte values.  It seems perfectly natural to me. I
>> must be missing something.
>>
>>  [snip]
> The difference is that for bytes and str it returns the result (they
> are immutable after all), but the suggested addition would mutate the
> list in-place. In order to be consistent it would have to return the
> result instead.


I don't think that consistency between str and list is desirable. If .index
for example were consistent in str and list it would look like this:

    [9, 8, 7, 6, 5].index([8,7]) # = 1

Also,
    reversed, sorted (copy)
    list.reverse, list.sort (in-place)
>From that perspective list.replace working in-place *is* consistent.

However, I can see that this '.replace' might cause more confusion than
future code clarity.

What about .indices though?
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