input: 
  def create_square_dict(numbers: List[int]) -> Dict[int, int]:
      """Create a dictionary where each integer key is mapped to its square value.
      >>> create_square_dict([1, 2, 3, 4, 5])
      {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
      >>> create_square_dict([0, -1, -2])
      {0: 0, -1: 1, -2: 4}
      """
  
output:     square_dict = {}
      for num in numbers:
          square_dict[num] = num ** 2
      return square_dict