Python Error: TypeError "argument of type 'type' not iterable

I am working on a school project where I have to generate a list of numbers with no repeats. The twist is I am not allowed to used random.sample() or random.shuffle(). I think I have found a way around it with my code except I get the error TypeError "argument of type 'type' not iterable. I have not been able to get around this so I need some help. Thanks for the help Here is the code:

import random
lis=[]

for i in range(5):
    rand=random.randint(1,10)
    if rand not in list: lis.append(rand)

print (lis)