http://docs.python.org/reference/simple_stmts.html#grammar-token-yield_stmt
The explanation of yield is not clear to me, as I don't know what a
generator is. I see the following example using 'yield'. Could
somebody explain how 'yield' works in this example? Thank you!
def brange(limit):
i = 0
while i < limit:
yield i
i += 1