On 16.03.2016 11:28, Joaquin Alzola wrote: > If len(my_iterable) is not 0: > for x in my_iterable: > # do > else: > # do something else I am sorry, I should have been more precise here. my_iterable is an iterator that's exhausted after a complete iteration and cannot be restored. It's furthermore too large to fit into memory completely. Best, Sven