> What's so hard about this? I've been programming python for quite a while, and never seen anything like main_iterator = 'abc' inner_iterator = '123'

> What's so hard about this? I've been programming python for quite a while, and never seen anything like main_iterator = 'abc' inner_iterator = '123' [c+n for c in main_iterator for n in inner_iterator] It's just ugly. I guess it has its purpose (cross products?) but it's still ugly. Once you know what that means, it's obvious what you mean by [j for i in main_iterator for j in inner_iterator(i)] But I've just never seen two loops crushed together like this.