It's funny the author throws a dig at Python for its syntax that actively discourages this kind of code. Like… my guy you're not taking the hint. Python makes things it doesn't want you to do ugly as sin. It's why lambda is so awkward and clunky.
a = [1, 2, 3, 4]
print([v*v for v in reversed(a) if v*v % 2 == 0]) FOURTH-> print([THIRD-> v*v for v in FIRST-> reversed(a) if SECOND-> v*v % 2 == 0])
a = [1, 2, 3, 4]
a = reversed(a)
a = [v*v for v in a]
a = [w for w in a if a % 2 == 0]
print(a)I often use generator expressions for the intermediate values (so I don't allocate a new list for each step), but I find this to be much more readable.