Adding Random Characters Between Characters in a String (Python)

I’m trying to add random letters after each letter in a given range, but they aren’t in complete randomness.

def add_letters(org,num):
    new_word = ''
    for i in org:
        randomLetter = random.choice(string.ascii_letters) * num
        new_word += i
        new_word += randomLetter
    return new_word

original = 'Hello!'
for num in range(1,5):
    #scramble the word using 'num' extra characters
    scrambled = add_letters(original,num)
    #output
    print("Adding",num,'random characters to',original,'->',scrambled)

some of the results will have the same letter repeating multiple times like "HAAAAeiiiilzzzzlBBBBoSSSS!jjjj". Instead, they should be random.

>Solution :

• You used *sum, which only generate randomLetter once and repeat the result letter for sum times. It’s not repeat the random generation. So the result repeated.
• It should be a loop or list-comprehension to generate mutiple randomLetter.

fixed code:

import random
import string
def add_letters(org,num):
    new_word = ''
    for i in org:
        randomLetter = "".join(random.choice(string.ascii_letters) for _ in range(num))
        new_word += i
        new_word += randomLetter
    return new_word

original = 'Hello!'
for num in range(1,5):
    #scramble the word using 'num' extra characters
    scrambled = add_letters(original,num)
    #output
    print("Adding",num,'random characters to',original,'->',scrambled)

result:

Adding 1 random characters to Hello! -> HNemldlgos!z
Adding 2 random characters to Hello! -> HVTeGYlYLlxdonV!GM
Adding 3 random characters to Hello! -> HqjbeQyOlgfHlAwqoyCj!PRq
Adding 4 random characters to Hello! -> HyFoLeyHUzlExGelVLlAoOhyz!EuzW