def perform_magic(first, second):
third = first[0]
first[0][0] = 5
second.append(third)
second[1][1] = 8
second.append([6,7])
first = [[3,4]]
second = [[1,2]]
perform_magic(first, second)
print(first[0])
print(second[2])
Output: [5,8] [6,7]
When i executed 'second[1][1] = 8' this also changed the value in first[0][1] from 4 to 8. Why?
