9 from copy import deepcopy class List: Implements an array-based List ADT. def pair_swap(self): Performs a pairwise swap on all nodes in source. Use: source.pair_swap() Returns: None Examples: || || || [1,2,3,4] -> [2,1,4,3] [1,2,3,4,5] -> [2,1,4,3,5] #your code here return
9 from copy import deepcopy class List: Implements an array-based List ADT. def pair_swap(self): Performs a pairwise swap on all nodes in source. Use: source.pair_swap() Returns: None Examples: || || || [1,2,3,4] -> [2,1,4,3] [1,2,3,4,5] -> [2,1,4,3,5] #your code here return
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
Related questions
Question
![from copy import deepcopy
class List:
||||||
Implements an array-based List ADT.
|| || ||
def pair_swap (self):
ILILIL
Performs a pairwise swap on all nodes in source.
Use: source.pair_swap()
Returns:
None
Examples:
|| || ||
[1,2,3,4] -> [2,1,4,3]
[1,2,3,4,5] → [2,1,4,3,5]
#your code here
return](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffa21f7d2-4dd0-4238-8547-d147ae559015%2F4ea45212-27dc-4129-a5a9-f950092d30f5%2F9qr3j7_processed.png&w=3840&q=75)
Transcribed Image Text:from copy import deepcopy
class List:
||||||
Implements an array-based List ADT.
|| || ||
def pair_swap (self):
ILILIL
Performs a pairwise swap on all nodes in source.
Use: source.pair_swap()
Returns:
None
Examples:
|| || ||
[1,2,3,4] -> [2,1,4,3]
[1,2,3,4,5] → [2,1,4,3,5]
#your code here
return
Expert Solution
Step 1: code
1from copy import deepcopy
2
3class List:
4 def __init__(self, items):
5 self.items = items
6
7 def pair_swap(self):
8 if len(self.items) % 2 == 0:
9 for i in range(0, len(self.items), 2):
10 self.items[i], self.items[i + 1] = self.items[i + 1], self.items[i]
11 else:
12 # If the list has an odd number of elements, swap all but the last element
13 for i in range(0, len(self.items) - 1, 2):
14 self.items[i], self.items[i + 1] = self.items[i + 1], self.items[i]
15
16 def __str__(self):
17 return str(self.items)
18
19# Examples
20my_list = List([1, 2, 3, 4])
21my_list.pair_swap()
22print(my_list) # Output: [2, 1, 4, 3]
23
24my_list2 = List([1, 2, 3, 4, 5])
25my_list2.pair_swap()
26print(my_list2) # Output: [2, 1, 4, 3, 5]
27
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