综合运用

Python 函数入门

Hugo Bowne-Anderson

Instructor

错误与异常

def sqrt(x):
    try:
        return x ** 0.5
    except:
        print('x must be an int or float')

sqrt(4)

2.0

sqrt('hi')

x must be an int or float

错误与异常

def sqrt(x):
    if x < 0:
        raise ValueError('x must be non-negative')
    try:
        return x ** 0.5
    except TypeError:
        print('x must be an int or float')

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Python 函数入门