In python, Given a list, L, the function front_two creates a new list of length 2 out of the first two items in L as follows: In the new list, the second item becomes the first item, and the first item becomes the second. If L contains only one item, the first item in the new list should be the value None. If L is empty, both items in the new list should be value None. The function returns the new list. For example: Test Result L = ['a', 'b', 'c', 'd'] print(front_two(L)) ['b', 'a'] L = [] print(front_two(L)) [None, None] L = [5, 2] print(front_two(L)) [2, 5] L = [7] print(front_two(L)) [None, 7]
In python, Given a list, L, the function front_two creates a new list of length 2 out of the first two items in L as follows: In the new list, the second item becomes the first item, and the first item becomes the second. If L contains only one item, the first item in the new list should be the value None. If L is empty, both items in the new list should be value None. The function returns the new list. For example: Test Result L = ['a', 'b', 'c', 'd'] print(front_two(L)) ['b', 'a'] L = [] print(front_two(L)) [None, None] L = [5, 2] print(front_two(L)) [2, 5] L = [7] print(front_two(L)) [None, 7]
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter17: Linked Lists
Section: Chapter Questions
Problem 8PE
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In python, Given a list, L, the function front_two creates a new list of length 2 out of the first two items in L as follows:
- In the new list, the second item becomes the first item, and the first item becomes the second.
- If L contains only one item, the first item in the new list should be the value None.
- If L is empty, both items in the new list should be value None.
- The function returns the new list.
For example:
Test | Result |
---|---|
L = ['a', 'b', 'c', 'd'] print(front_two(L)) | ['b', 'a'] |
L = [] print(front_two(L)) | [None, None] |
L = [5, 2] print(front_two(L)) | [2, 5] |
L = [7] print(front_two(L)) | [None, 7] |
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