input: Write a python function to calculate the distance between two points in 3D space.
  assert distance_three_d([1, 2, 3], [4, 5, 6]) == 5.196152422706632
  assert distance_three_d([0, 0, 0], [0, 0, 0]) == 0.0
  assert distance_three_d([1, 2, 3], [1, 2, 3]) == 0.0
output: def distance_three_d(point1, point2):
      from math import sqrt
      return sqrt((point2[0] - point1[0]) ** 2 + (point2[1] - point1[1]) ** 2 + (point2[2] - point1[2]) ** 2)