I think the problem of list comprehension is that it is not as flexible as combination of map() and filter(). For example, [F(x) for x if P(x)] is equivale

I think the problem of list comprehension is that it is not as flexible as combination of map() and filter(). For example, [F(x) for x if P(x)] is equivalent to map(F, filter(P, S)) but what about the equivalence of filter(P, map(F, S))? Without using any map() and filter(), this is the solution came up to my mind [x for x in [F(y) for y in S] if P(x)] Pretty ugly, huh?