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Python Python Collections (2016, retired 2019) Slices Back and Forth

Posted by Jesh Patel
Jesh Patel
1,252 Points

slice challenge question 1 of 3.

cant get pass the slice challenge question in "Back and Forth". I am stuck on 1 of 3.

slices.py 
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[:]
slice1[2:6]
Tim Betz
Tim Betz
15,146 Points

It says it wants the second, third and fourth item. You are giving it one more, the fifth as well. Use [2:5]

Jesh Patel
Jesh Patel
1,252 Points

Bummer! Didn't find the right things in slice1. when I type slice1[2:5]

10 Answers

james south
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james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
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james south
Front End Web Development Techdegree Graduate 33,271 Points

slice notation is inclusive of the first index and exclusive of the second index, so [2:6] will get items 2,3,4,5.

Alexander Davison
Alexander Davison
65,469 Points

so [2:6] will get indices 2,3,4,5 :)

Bakthyar Syed
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Bakthyar Syed
Courses Plus Student 884 Points
Bakthyar Syed
Bakthyar Syed
Courses Plus Student 884 Points

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]

Jesh Patel
Jesh Patel
1,252 Points
Jesh Patel
Jesh Patel
1,252 Points

Hey Tri Pham that worked. Thanks

Tri Pham
Tri Pham
18,671 Points
Tri Pham
Tri Pham
18,671 Points

I don't think slice1[number1:number2] actually changes the slice1 array but returns a new array. So do slice1=slice1[number1:number2] or just slice1 = favorite_things [number1: number2]. Of course number1 and number2 are your actual numbers (0,1,2...).

Jesh Patel
Jesh Patel
1,252 Points

Its giving me the same reply. "Bummer! Didn't find the right things in slice1".

Tri Pham
Tri Pham
18,671 Points

I think the other poster got it wrong. Its not [2:5] but [1:4].

james south
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james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
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james south
Front End Web Development Techdegree Graduate 33,271 Points

remember that 0-based indexing is used, so the first item is index 0, not 1. the second item is index 1 and the fourth item is index 3.

mully BENDET
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mully BENDET
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mully BENDET
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mully BENDET
Front End Web Development Techdegree Student 3,054 Points

me

mully BENDET
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mully BENDET
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mully BENDET
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mully BENDET
Front End Web Development Techdegree Student 3,054 Points

sorry that was a mistake

mully BENDET
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mully BENDET
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mully BENDET
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mully BENDET
Front End Web Development Techdegree Student 3,054 Points

Tri Pham good explanation

mully BENDET
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mully BENDET
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mully BENDET
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happy coding

Oren Schindler
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Oren Schindler
Python Web Development Techdegree Student 1,098 Points
Oren Schindler
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Oren Schindler
Python Web Development Techdegree Student 1,098 Points

The issue isn't indexing, it's that it was demonstrated one way, where one makes a copy of the list, and saves that in a variable, which then is sliced. All of the answers provided show a completely different formatting. I still don't understand why creating a copy of favorite_things and then slicing that copy doesn't work? Is it because you simply need to print it? If so, that wasn't demonstrated either....