Page 404 - Computer Science V2.0 Class 11

Solved Programming Questions
1. Write a function to remove the duplicate elements from a list. You are not allowed to create a new list within the
function. Make use of it to write a program that accepts as input a list from a user and display the list without
duplicates.

01 def removeDuplicates(lst):
02 '''
03 Objective: To remove duplicates from the input list
04 Input Parameter:
05 lst- a list, possibly with duplicate elements
06 Return Value: None
07 Side Effect: The modified list has the duplicates removed
08 '''
09 #Approach: For each element, remove it if its count>0.
10
11 for element in lst:
12 while lst.count(element)>1:
13 lst.remove(element)
14 return lst
15 lst = eval (input('Enter the list:\n'))
16 lst = removeDuplicates(lst)
17 print("After removing duplicate elements", lst)

Sample output:
>>> Enter the list:
[4, 6, 2, 5, 6, 3, 6, 4, 9, 2, 4, 6, 7, 4, 6, 7]
>>> After removing duplicate elements [5, 3, 9, 2, 4, 6, 7]

2. Write a function to create a list that is devoid of duplicates in the given list. Make use of it to write a program that
accepts as input a list from a user and display the list without duplicates.
01 def removeDuplicates(lst1):
02 '''
03 Objective: To return list without duplicates.
04 Input Parameter: lst1- list with duplicate elements
05 Return Value: A list without duplicate elements
06 '''
07 lst2 = []
08 for element in lst1:
09 if element not in lst2:
10 #append it to lst2
11 lst2.append(element)
12 return lst2
13
14 # Objective: To remove duplicate from a list
15 myList = eval(input('Enter the list:\n'))
16 result = removeDuplicates(myList)
17 print('List with no duplicates:' , result)
18 print('Original List:' , myList)

Sample output:
>>> Enter the list:
[4, 6, 2, 5, 6, 3, 6, 4, 9, 2, 4, 6, 7, 4, 6, 7]
List with no duplicates: [4, 6, 2, 5, 3, 9, 7]
Original List: [4, 6, 2, 5, 6, 3, 6, 4, 9, 2, 4, 6, 7, 4, 6, 7]

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