Comparing elements of two lists in python

Question

so I need to compare the elements of 2 lists in python,and if they have more than 15 elements in common,it should show a message.I tried to traverse those lists using the for loop,and compare every element from that list,and if they were equal,I made a counter to count my correct answers and if they were above 15 show the message "You passed".But it doesn't work at all,it always says that I passed no matter what Here is the code:

for j in answerList:
    for k in answers:
        if(k==j):
            nr+=1
if(nr>15):
    print("You passed")
else:
    print("You failed")

Answer 1

Because for answerList , the answer is re-iterated, so you should use zip()

for j,k in zip(answerList,answers):
    if(k==j):
        nr+=1
if(nr>15):
    print("You passed")
else:
    print("You failed")

Or nr=sum(k==j for j,k in zip(answerList,answers))

Answer 2

By considering len(answers) == len(answerList) , you can zip() two lists and perform comparison in one line

n = len([*filter(lambda x: x[0] == x[1], zip(answerList, answers))])

if n > 15:
     print("You passed")
else:
     print("You failed")

FYI: In your case, the time complexity is O(len^2) and in this case, it would be O(n)