python倒计时程序

以下是一个Python的倒计时程序的示例代码：

def countdown(start):
    if start < 0:
        print("start must be non-negative!")
    else:
        for i in range(start, -1, -10):
            if i == 0:
                print(i)
            elif i < 10:
                print("0" + str(i))
            else:
                print(i)

countdown(60)

这段代码定义了一个名为`countdown`的函数，它以秒数作为起点，并从那里开始倒计时，每次递减10秒。如果起始秒数小于0，它会打印出"start must be non-negative!"的提示信息。倒计时的结果按照指定的格式进行打印，如果倒计时到达0，会单独打印出0。你可以通过调用`countdown`函数并传入起始秒数来运行这个倒计时程序。在这个例子中，起始秒数为60。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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