March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Content preview from Python语言及其应用（第2版）
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习题答案
｜
457
>>> def test(func):
... def new_func(*args, **kwargs):
... print('start')
... result = func(*args, **kwargs)
... print('end')
... return result
... return new_func
...
>>>
>>> @test
... def greeting():
... print("Greetings, Earthling")
...
>>> greeting()
start
Greetings, Earthling
end
4.
定义异常
OopsException
。产生该异常，看看会发生什么。然后，编写代码，捕获该异
常并打印出
'Caught an oops'
。
>>> class OopsException(Exception):
... pass
...
>>> raise OopsException()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
__main__.OopsException
>>>
>>> try:
... raise OopsException
... except OopsException:
... print('Caught an oops')
...
Caught an oops
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