how to place a random character in a sring python code example

Example 1: generate random characters in python

import random
import string

def get_random_alphanumeric_string(length):
    letters_and_digits = string.ascii_letters + string.digits
    result_str = ''.join((random.choice(letters_and_digits) for i in range(length)))
    print("Random alphanumeric String is:", result_str)

get_random_alphanumeric_string(8)
get_random_alphanumeric_string(8)

Example 2: python generate random string

''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(N))