input: Write a function to calculate the distance between two points. Given two points `point1` with coordinates `(x1, y1)` and `point2` with coordinates `(x2, y2)`, the function should return the Euclidean distance between the two points. Use the `math.sqrt` function to compute the square root.
  
  
  import math
  
  def distance_between_points(x1, y1, x2, y2):
      return math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
  
  # Test cases
  assert distance_between_points(2, 7, 4, 9) == math.sqrt(8)
  assert distance_between_points(0, 0, 0, 0) == 0
  assert distance_between_points(1, 1, 1, 1) == 0
  assert distance_between_points(3, 0, 0, 4) == 5
  
output: import math
  
  def distance_between_points(x1, y1, x2, y2):
      return math.sqrt((x2 - x1)**2 + (y2 - y1)**2)