How To Introduce Typo In A String?

I would like to introduce typos in a string. I have a parameter typo_prob which would flip a character in a string with a probability of typo_prob. For example, if typo_prob is 0.1

Solution 1:

import random
import string

message = "Where do you live?"
message = list(message)

for pos, char in enumerate(message):
    message[pos] = random.choice(string.ascii_lowercase) if random.random() < 0.1 else char

message = "".join(message)