[Tutor] len(l) as loop index

[Kirby Urner]

At 07:26 AM 4/4/2002 -0800, I wrote:

>So, final form:
>
>def sort(thelist):  # called from various functions
>         thelist.sort()
>         return thelist
>
>def edges(face):
>         edges = []
>         for i,j in zip(face,face[1:]+[face[0]]):
>            edges.append(sort(list((i,j))))
>         return edges
>
> >>> edges(['A','C','D','E'])
>[['A', 'C'], ['C', 'D'], ['D', 'E'], ['A', 'E']]
>
>There would be other forms of the above

Such as:

    def edges(face):
         def sort(alist):
            alist = list(alist) # might have been a tuple
            alist.sort()
            return alist
         return [sort(alist) for alist \
                in zip(face,face[1:]+[face[0]])]

  >>> edges(['A','C','B','E'])
  [['A', 'C'], ['B', 'C'], ['B', 'E'], ['A', 'E']]

Kirby