$ cat else.py
#! /usr/bin/python

def foo():
    yield 1
    yield 2
    yield 3

f = foo()
stop = False
while not stop:
    try:
        print f.next()
        print "else"
    except StopIteration:
        print 'stop'
        stop = True

    print 'after'

$ python else.py
1
else
after
2
else
after
3
else
after
stop
after