code: def dist_2(x0, y0, x1, y1):
      r
      d0 = x1 - x0
      d1 = y1 - y0
      return d0 * d0 + d1 * d1
docs: r"""Return the squared distance between two points.
  
      This is faster than calculating distance but should
      only be used with comparable ratios.
  
      Parameters
      ----------
      x0: float
          Starting x coordinate
      y0: float
          Starting y coordinate
      x1: float
          Ending x coordinate
      y1: float
          Ending y coordinate
  
      Returns
      -------
      d2: float
          squared distance
  
      See Also
      --------
      distance