Guido van Rossen wrote:
> I think the pattern hasn't been commonly known; people have been
> struggling with setdefault() all these years.
I use setdefault _only_ to speed up the following code pattern:
if akey not in somedict:
somedict[akey] = list()
somedict[akey].append(avalue)
These lines of simple Python are much easier to read and write than
somedict.setdefault(akey, list()).append(avalue)
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