Question

I want to define a generator from a list that will output the elements one at a time, then use this generator object in an appropriate manner.

a = ["Hello", "world", "!"]
b = (x for x in a)
c = next(b, None)
while c != None:
    print c,
    c = next(b, None)

Is there anything wrong or improvable with the while approach here? Is there a way to avoid having to assign ‘c’ before the loop?

Thanks!

Answer 1

Why would you use a while loop? In Python, for loops are absolutely designed for this:

a = ["Hello", "world", "!"]
b = (x for x in a)
for c in b:
    print c,

If you are stuck on a while implementation for whatever reason, your current implementation is probably the best you can do, but it’s a bit clunky, don’t you think?