input: Write a python function to calculate the Euclidean distance between two points.
  assert distance((5, 3), (2, 2)) == 3.1622776601683795
  assert distance((0, 0), (3, 4)) == 5.0
  assert distance((1, 1), (4, 5)) == 5.0
output: def distance(point1, point2):
      return ((point1[0] - point2[0]) ** 2 + (point1[1] - point2[1]) ** 2) ** 0.5