blah.py

magicians = "penn teller copperfield".split()

for magicians in magicians:
    print(magicians)

# IS THE SAME AS

magicians = "penn teller copperfield".split()

_magicians_it = iter(magicians) # never enters the namespace
while True:
    try:
        magicians = next(_magicians_it)
        print(magicians)
    except StopIteration:
        break
del _magicians_it # but uh, it never entered the namespace