[empthought]

No. You are supposed to use intermediate variables that contain generators, and write short named functions to call within generator expressions, instead of writing big run-on chains and compositions with little bits of anonymous logic floating around in it.

The = binding is the chaining/composition tool of choice. This is why generator expressions are so important, relative to list and dict comprehensions. They both defer the allocation of space for intermediate values and allow the space to be bounded no matter what the input length is.

Often the “reduce” step, or even more commonly, realizing the side effects of such a generator composed of generators is a simple for loop—because that’s the most readable way to walk through it.