input: 
  def create_square_dict(numbers: List[int]) -> Dict[int, int]:
      """ Create a dictionary where each key is an integer from the list, and its corresponding value is the square of the key.
      >>> create_square_dict([1, 2, 3, 4, 5])
      {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
      """
  
output:     return {num: num ** 2 for num in numbers}