sorted (WAS: lambda)

Steven Bethard steven.bethard at gmail.com
Thu Jan 13 19:28:27 CET 2005


Paul Rubin wrote:
> 
> That completely depends on the objects in question.  Compare
> 
>    temp = all_posters[:]
>    temp.sort()
>    top_five_posters = temp[-5:]
> 
> to:
> 
>    top_five_posters = all_posters.sorted()[-5:]
> 
> which became possible only when .sorted() was added to Python 2.4.

I believe you mean "when sorted() was added to Python 2.4":

py> ['d', 'b', 'c', 'a'].sorted()
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
AttributeError: 'list' object has no attribute 'sorted'
py> sorted(['d', 'b', 'c', 'a'])
['a', 'b', 'c', 'd']

Note that sorted is a builtin function, not a method of a list object. 
It takes any iterable and creates a sorted list from it.  Basically the 
equivalent of:

def sorted(iterable):
     result = list(iterable)
     result.sort()
     return result

Steve



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