Python – Index Value repetition in List

When it is required to find the index value that has been repeated in a list, it is iterated over using the list comprehension and ‘enumerate’.

Example

Below is a demonstration of the same

my_list = [4, 0, 3, 1]

print("The list is :")
print(my_list)

my_result = [element for sub in ([index] * element for index, element in enumerate(my_list)) for element in sub]

print("The result is :")
print(my_result)

Output

The list is :
[4, 0, 3, 1]
The result is :
[0, 0, 0, 0, 2, 2, 2, 3]

Explanation

• A list is defined and is displayed on the console.

• List comprehension is used to iterate through the index values of the list.

• The ‘enumerate’ is used to give values to elements of the list.

• This is assigned to a variable.

• This is displayed as output on the console.

AmitDiwan

Published on 16-Sep-2021 09:22:21

• Related Questions & Answers
• Python – Replace value by Kth index value in Dictionary List
• Python – Convert List to Index and Value dictionary
• Element repetition in list in Python
• Python – Append List every Nth index
• Python – Sort Dictionary List by Key’s ith Index value
• Python – Negative index of Element in List
• Accessing index and value in a Python list
• How does repetition operator work on list in Python?
• Python – Split List on next larger value
• Python – Check if elements index are equal for list elements
• Python – Find Product of Index Value and find the Summation
• Python – Elements with same index
• Python - Character repetition string combinations
• Program to find largest kth index value of one list in Python
• Index minimum value Record in Python