input: Write a function to calculate the distance between two points given their coordinates. Use the Euclidean distance formula to calculate the distance between the points (x1, y1) and (x2, y2). Return the calculated distance.
  
  assert distance_between_points(2, 7, 4, 9) == math.sqrt(8)
  assert distance_between_points(0, 0, 3, 4) == 5.0
  assert distance_between_points(-1, -1, 2, 3) == 5.0
  assert distance_between_points(1, 1, 1, 1) == 0.0
  assert distance_between_points(-3, 4, 5, 9) == math.sqrt(89)
output: import math
  
  def distance_between_points(x1, y1, x2, y2):
      return math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)