On 11/03/2013 00:16, Dave Friedman wrote:
Hi all,
I'm teaching myself Python in part with Google's course, and one of the
exercises is to sort a list of tuples by the last element.
e.g.: a list [(1, 7), (1, 3), (3, 4, 5), (2, 2)] yields [(2, 2), (1, 3),
(3, 4, 5), (1, 7)].
My answer, after figuring out lambda functions, is
def sort_last(tuples):
return sorted(tuples, key= lambda t: t[-1])
Google's answer is much more straightforward, except for one part.
def sort_last(tuples)
return sorted(tuples, key=last)
What is 'last', and where can I find a description of it? Searching the
web and the python docs hasn't been helpful. (Maybe I'm searching badly?)
Insight and pointers appreciated.
Thanks,
-Dave
'last' is a user defined function that does exactly the same as your
lamdba function as shown here
https://github.com/megantaylor/Google-Python-Exercises/blob/master/list1.py
--
Cheers.
Mark Lawrence
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