input: Write a python function to calculate the distance between two coordinates.
  assert distance_calc((0, 0), (3, 4)) == 5.0
  assert distance_calc((1, 2), (4, 6)) == 5.0
  assert distance_calc((-1, -1), (2, 3)) == 5.0
output: def distance_calc(coord1, coord2):
      import math
      return math.sqrt((coord2[0] - coord1[0]) ** 2 + (coord2[1] - coord1[1]) ** 2)