[FIXED] I want to duplicate a random letter of a string 1 time. How can I do?

Issue

This is my string:

keyword = "qatarworldcup"

I mean my string should be qqatarworldcup, qatarworldcupp or qatarrworlddcup

Solution

Iteration through index-character pairs, apply the condition on each "term" with the ternary operator and join everything together.

import random

# fix random number generator (for testing only!)
random.seed(190)

keyword = "qatarworldcup"

# random index
r = random.randint(0, len(keyword)-1)
out = ''.join(char * 2 if i == r else char for i, char in enumerate(keyword))

print(out)
#qaatarworldcup

Answered By - cards