python最丑，rust最美。

下面是对比。

先来python def main(): option = 3 match option: case 1: a = 10 b = 5 c = a + b d = c * 2 e = d - 3 result = e case 2: a = 20 b = 5 c = a - b d = c * 3 e = d + 4 result = e case 3: a = 30 b = 2 c = a * b d = c / 2 e = int(d + 1) result = e case 4: a = 40 b = 2 c = a / b d = c - 5 e = d * 2 result = e case 5: a = 50 b = 3 c = a % b d = c + 10 e = d * 2 result = e…。

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