这意味着复杂的数据结构可以表示成类，Web服务栈能够自动将类属性映射到WSDL文件中定义的数据类型。

This means the complex data structures can be represented as classes and the Web Services stack will automatically map the class attributes to the data types defined in the WSDL file.

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现在已经定义了栈的抽象数据类型，我们转向栈的实现。

Now that we have clearly defined the stack as anabstract data type we will turn our attention to using Python toimplement the stack.

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