Python：如何测试处理异常的路径？

Question

鉴于此代码：

def main(b):
    try:
        a = 2 / b
        return "Hello World"
    except Exception:
        return "Exception"

如何使用修补测试处理异常的路径？ 是否可以将a = 2 / b作为修补的有效目标？

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