input: Write a function to 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. The function should take a list of numbers as input and return the corresponding dictionary.
  
  assert create_square_dict([1, 2, 3, 4, 5]) == {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
  assert create_square_dict([0, -1, -2, -3]) == {0: 0, -1: 1, -2: 4, -3: 9}
  assert create_square_dict([]) == {}
  assert create_square_dict([4]) == {4: 16}
  assert create_square_dict([1, -1]) == {1: 1, -1: 1}
output: def create_square_dict(numbers):
      return {x: x**2 for x in numbers}