How does `x, y = y, x` swap two variables in one line, and how does that same pack-then-unpack trick let a single function hand back many values at once?
Short drills on what this video just taught. Write the code, run the checks, and reveal the answer only if you are stuck.
The given left holds 'red' and right holds 'blue'. Using one tuple-assignment line, trade their values so left ends up with 'blue' and right with 'red'. The final line then packages the pair into swapped.