[Tutor] Aschenputtel problem

Alan Gauld alan.gauld at btinternet.com
Thu Sep 15 23:13:02 CEST 2005

> I wonder if there is a shorter form of the following idiom:

Bearing in mind that shorter is not necessarily better...

[condition(i) and list1.append(i) or list2.append(i) for i in 

This returns a list of booleans that we throw away but the
list1,list2 containers will have been modified as required.

But the original code(below) is probably more reliable and 

> list1 = []
> list2 = []
> for item in original_list:
>    if condition(item):
>        list1.append(item)
>    else:
>        list2.append(item)

> I call this the "Aschenputtel" problem, because it is described
> by the famous quote from the fairy tale as told by the
> Grimm brothers:
> "Die guten ins Töpfchen, die schlechten ins Kröpfchen."
> (The good ones in the pot, the bad ones in the crop)


Alan G. 

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