code: def distance(p_a, p_b):
      
      return sqrt((p_a.lat - p_b.lat) ** 2 + (p_a.lon - p_b.lon) ** 2)
docs: Euclidean distance, between two points
  
      Args:
          p_a (:obj:`Point`)
          p_b (:obj:`Point`)
      Returns:
          float: distance, in degrees