When is a class more useful to use than a function? Is there any hard or fast rule that I should know about? Is it language dependent? I'm intending on writing a script for Python which will parse different types of json data, and my gut feeling is that I should use a class to do this, versus a function.When is a class more useful to use than a funct
阅读背景：
我应该何时使用课程，何时应该使用某个功能？
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