Breadth-first version of itertools.chain()

Question

In itertools there\'s chain, which combines multiple generators in a single one, and in essence does a depth-first iteration over them, i.e., cha

Answer 1

Not sure if you'd still consider this too "verbose"...

def chain_bfs2(*generators):
    generators = map(iter, generators)
    while generators:
        for i, generator in enumerate(generators):
            try:
                yield generator.next()
            except StopIteration:
                del generators[i]

print list(chain_bfs2('AB', '123'))  # ['A', '1', 'B', '2', '3']