input: 
  from typing import List, Dict
  
  def create_square_dictionary(numbers: List[int]) -> Dict[int, int]:
      """ Create a dictionary which contains a data structure in the form of 
      [x: x^2] where x is the key and x^2 is the value.
      >>> create_square_dictionary([1, 2, 3, 4, 5])
      {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
      """
  
output:     result = {}
      for num in numbers:
          result[num] = num ** 2
      return result