input: Write a function to calculate the distance between two points on a two-dimensional plane. The function should take four arguments, representing the coordinates of the two points (x1, y1) and (x2, y2). The function should return the distance between these two points.
  assert calculate_distance(3, 4, -9, -2) == 13.0
  assert calculate_distance(0, 0, 0, 0) == 0.0
  assert calculate_distance(-1, -1, 1, 1) == 2.8284271247461903
  assert calculate_distance(1, 2, 3, 4) == 2.8284271247461903
  assert calculate_distance(0, 1, 0, 5) == 4.0
output: def calculate_distance(x1, y1, x2, y2):
      return ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5