input: Write a function to print a dictionary where the keys are elements from the input list and the values are the products of each element multiplied by itself.
  
  assert product_of_list([7, 8, 5]) == {7: 49, 8: 64, 5: 25}
  assert product_of_list([10, 2]) == {10: 100, 2: 4}
  assert product_of_list([3, 3, 3]) == {3: 9, 3: 9, 3: 9}
  assert product_of_list([]) == {}
  assert product_of_list([0, 1, 2]) == {0: 0, 1: 1, 2: 4}
output: def product_of_list(lst):
      return {x: x * x for x in lst}