input: Write a function to create a dictionary that maps each number in a given list to its square value. The function should return the dictionary.
  
  def create_square_dictionary(numbers):
      return {num: num**2 for num in numbers}
  
  assert create_square_dictionary([1, 2, 3, 4, 5]) == {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
  assert create_square_dictionary([0, -1, -2, 3, 4]) == {0: 0, -1: 1, -2: 4, 3: 9, 4: 16}
  assert create_square_dictionary([]) == {}
output: def create_square_dictionary(numbers):
      return {num: num**2 for num in numbers}