copying generatrors

[Matimus]

Why not just do this:

>>> def foo():
...  yield 1
...  yield 2
...  yield 3
...
>>> f = foo()
>>> g = foo()
>>> f.next()
1
>>> f.next()
2
>>> f.next()
3
>>> g.next()
1
>>> g.next()
2
>>> g.next()
3