[Python-Dev] dict.addlist()

[Bob Ippolito]

On Jan 20, 2004, at 9:17 AM, Raymond Hettinger wrote:

> Here is anidea to kick around:
>
> Evolve and eventually replace dict.setdefault with a more specialized
> method that is clearer, cleaner, easier to use, and faster.
>
>        d.addlist(k, v)   would work like   d.setdefault(k, 
> []).append(v)

-1

There are other reasons to use setdefault.  This one is pretty common 
though, but I think a more generic solution could be implemented.

Perhaps:

d.setdefault(k, factory=list).append(v) ?

-bob
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