Programme chap5_exception_630_.py

# coding: latin-1
class point_espace:

    #...

    class class_iter:
        def __init__ (self,ins):
            self._n   = 0
            self._ins = ins
        def __iter__ (self) :
            return self
        def next (self):
            if self._n <= 2:
                v = self._ins [self._n]
                self._n += 1
                return v
            else :
                raise StopIteration

    def __iter__(self):
        return point_espace.class_iter (self)

# ...