Programme chap4_classe_1806_.py

# coding: latin-1
class point_espace(object):
    __slots__ = "_x", "_y", "_z"

    def __init__ (self, x,y,z): self._x, self._y, self._z = x,y,z
    def __str__(self): return "(%f,%f,%f)" % (self._x, self._y, self._z)

a = point_espace (1,-2,3)
print a