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:TestResultL = ['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]

Answered: In python, Given a list, L, the…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

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]

Expert Solution

Algorithm:

Step-1: Start

Step-2: function front_two(list1)

Step-2.1: Declare a list list2

Step-2.2: if length of list1 is 1, then add element None & list1[0] in list2 and return list2

Step-2.3: Otherwise, if list, then add element list1[1] & list1[0] in list2 and return list2

Step-2.4: Otherwise, return [None, None]

Step-3: Call function front_two(['a', 'b', 'c', 'd']) and print return value

Step-4: Call function front_two([]) and print return value

Step-5: Call function front_two([5, 2) and print return value

Step-6: Call function front_two([7]) and print return value

Step-7: Stop

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions