Given a string with duplicate characters in it. Write a program to generate a list that only contains the duplicate characters. In other words, your new list should contain the characters which appear more than once.Suggested ApproachUsed two nested for loops.The first for loop iterates from 0 to range(len(input_str)).The second for loop iterates from first_loop_index + 1 to range(len(input_str)). The reason you want to start at first_loop_index + 1 in the nested inner loop is that the outer loop already checks the current character. In the nested inner loop, you want to check the remaining characters in the input string.If the current character of the outer loop matches the character of the nested loop AND the character is not already IN the duplicate list, append it to the listnhantranSample Output 1List of duplicate chars: ['n', 'a']Sample Input 2pneumonoultramicroscopicsilicovolcanoconiosisSample Output 2List of duplicate chars: ['p', 'n', 'u', 'm', 'o', 'l', 'r', 'a', 'i', 'c', 's']Sample Input 3pulchritudinousSample Output 3List of duplicate chars: ['u', 'i']Sample Input 4ordenSample Output 4List of duplicate chars: []

Programming approach Define the method named duplicateCharacters that takes parameter "input_str"…

Answered: iven a string with duplicate characters…

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

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Suggested Approach

Used two nested for loops.
The first for loop iterates from 0 to range(len(input_str)).
The second for loop iterates from first_loop_index + 1 to range(len(input_str)). The reason you want to start at first_loop_index + 1 in the nested inner loop is that the outer loop already checks the current character. In the nested inner loop, you want to check the remaining characters in the input string.
If the current character of the outer loop matches the character of the nested loop AND the character is not already IN the duplicate list, append it to the list
nhantran
Sample Output 1
List of duplicate chars: ['n', 'a']
Sample Input 2
pneumonoultramicroscopicsilicovolcanoconiosis
Sample Output 2
List of duplicate chars: ['p', 'n', 'u', 'm', 'o', 'l', 'r', 'a', 'i', 'c', 's']
Sample Input 3
pulchritudinous
Sample Output 3
List of duplicate chars: ['u', 'i']
Sample Input 4
orden
Sample Output 4
List of duplicate chars: []

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