TypeError: 'in <string>' requires string as left operand, not int

Question

ERROR message:
Traceback (most recent call last):
File "C:/Users/Brittany/AppData/Local/Programs/Python/Python36-32/Hangman_2.0.py", line 17, in <module>
if guessed_letter in random_secret_word:
TypeError: 'in <string>' requires string as left operand, not int

CODE:

import random
play_game = input('Play game?' '').title()

while play_game == 'Yes':
print ('Welcome to Hangman!')
secret_words = ('Solo Learn', 'C', 'Python', 'C++',\
'Ruby On Rails', 'Ruby', 'Java', 'Javascript',\
'Html', 'C#', 'Objective C')
random_secret_word = random.choice(secret_words)
print ('Guess letter!')
guessed_letter = input()
letters = random_secret_word.index(random_secret_word)
correct = guessed_letter in random_secret_word
all_correct = letters
wrong = guessed_letter not in random_secret_word
for guessed_letter in range(0,15):
if guessed_letter in random_secret_word:
print ('Correct letter!')
else:
print ('Wrong')

if all_correct:
print (random_secret_word)

else:
print ('You lose!')

Answer 1

That didn't fix my problem because i need to repeat the loop and input 15 times