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Start your free trialPayam Mesgari
Python Web Development Techdegree Student 1,072 PointsWhy method chaining does not work on sort()?
Why my line fails when I try to sort the sorted_things directly after copying it, I want to do this in one line.
favorite_things = ['raindrops on roses', 'whiskers on kittens', 'bright copper kettles',
'warm woolen mittens', 'bright paper packages tied up with string',
'cream colored ponies', 'crisp apple strudels']
slice1 = favorite_things[1:4]
slice2 = favorite_things[len(favorite_things)-2:]
sorted_things = favorite_things[:].sort()
1 Answer
Steven Parker
231,275 PointsYou have two issues here:
- the temporary copy produced by the slice must be assigned to something or it is disposed
- the sort method re-orders the list it is applied to, but it does not return anything
So you probably want to use the sorted function instead:
sorted_things = sorted(favorite_things[:])
And while this works, I should point out for the benefit of other readers that the challenge was expecting this to be done on 2 lines using sort.
FYI: for slice2, you don't need to compute the position using the length, a negative offset will do:
slice2 = favorite_things[-2:]