[Tutor] is this use or abuse of __getitem__ ?

[eryksun]

On Sat, Sep 15, 2012 at 4:43 AM, eryksun <eryksun at gmail.com> wrote:

>     else:
>         start = index(self.nCases + key if key < 0 else key)  # may
> raise TypeError
>         stop = start + 1
>         step = 1


Gmail is such a pain sometimes. I should have called index first anyway:

        key = index(key)  # may raise TypeError
        start = key + self.nCases if key < 0 else key
        stop = start + 1
        step = 1


>     records = []
>     for i in range(start, stop, step):
>         ...
>         records.append(record)


You can boost the performance here a bit by caching the append method.
This avoids a LOAD_ATTR operation on each iteration:

    records = []
    append = records.append
    for i in range(start, stop, step):
        ...
        append(record)