Generating random strings until a given string is generated

import string

import random

import time

possibleCharacters = (string.ascii_lowercase + string.digits +

string.ascii_uppercase + ' ., !?;:')

t = "hi"

attemptThis = ''.join(random.choice(possibleCharacters)

for i in range(len(t)))

attemptNext = ''

completed = False

iteration = 0

while completed == False:

print(attemptThis)

attemptNext = ''

completed = True

for i in range(len(t)):

if attemptThis[i] != t[i]:

completed = False

attemptNext += random.choice(possibleCharacters)

else:

attemptNext += t[i]

iteration += 1

attemptThis = attemptNext

time.sleep(0.1)

print("Target matched after " +

str(iteration) + " iterations")