input: Write a python function to calculate the distance between two points.
  assert calculate_distance((0, 0), (3, 4)) == 5.0
  assert calculate_distance((1, 1), (4, 5)) == 5.0
  assert calculate_distance((-1, -1), (2, 3)) == 5.0
output: def calculate_distance(point1, point2):
      import math
      return math.sqrt((point2[0] - point1[0]) ** 2 + (point2[1] - point1[1]) ** 2)