链式比较
i = 3nprint(1 < i < 3) # Falsenprint(1 < i <= 3) # True
i = 3nprint(1 < i < 3) # Falsenprint(1 < i <= 3) # True
i = 3nprint(1 < i < 3) # Falsenprint(1 < i <= 3) # True
i = 3nprint(1 < i < 3) # Falsenprint(1 < i <= 3) # True
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