from math import *

class Point():
	"""This class defines a point in 2 space."""
	def __init__(self, x, y):
		"""
		Pre: x and y are numbers
		Post: returns a Point with coordinates (x,y)
		"""
		self.x = x
		self.y = y
		
	def __str__(self):
		"""Post: returns the string representation of this object"""
		return "(" + str(self.x) + ", " + str(self.y) + ")"
        
	@staticmethod
	def distance(p1, p2):
		"""
		Pre: p1 and p2 are Point objects
		Post: returns the distance between the two points given
		"""
		d = sqrt((p1.x - p2.x)**2 + (p1.y - p2.y)**2 )
		return d
            
	@classmethod
	def help(cls):
		print("--------------------------------------------")
		print(cls.__name__ + ": " + cls.__doc__)
		print("--------------------------------------------")
		for attr in cls.__dict__:
			if (cls.__dict__[attr].__doc__):
				print(str(attr) + ": " + cls.__dict__[attr].__doc__)
			else:
				print(str(attr))