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Python

Posted by atoniolo
atoniolo
9,216 Points

Cannot Get this question in python collections, back and forth

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']

def slice1(favorite_things): favorite_things.slice(1,2,3) return favorite_things

I do not know what I did wrong.

1 Answer

ursaminor
ursaminor
11,271 Points
ursaminor
ursaminor
11,271 Points

slice() is not a list method so you can't call it on the favorite_things list like you're doing. It creates a slice object that you can use to get items from a list. You can get the items created by the slice object by using the list index method:

favorite_things[slice(1, 2, 3)]

However, this won't actually change favorite_things, so when you return favorite_things it will be the same as before. You need to store it in another variable and return that.

result = favorite_things[slice(1, 2, 3)]
return result

Also, not sure what you're trying to get, but the syntax is slice(start, stop, step) so you'll only end up with the second item in the list with slice(1, 2, 3)

I think an easier way is using slice index notation:

some_list[start: stop: step]

https://stackoverflow.com/questions/509211/understanding-pythons-slice-notation