Yeah, I know, I know. But I imagine many people would mentally want to bracket [e for x in xs for y in ys] like [(e for x in xs) for y in ys] and thus conclude that y is the outer loop.

Yeah, right, mentally want to, jfc, instead of just RTFMing and easily finding out the meaning. Lazy and entitled af. All the rest of us bloody well RTFM. You are special?