Simply put, Python provides an elegant solution by including an immutable collection-based class designed to deal exclusively with sequences of characters.
简单来说，Python通过包括一个不变的基于集合的类来提供一个优秀的解决方案，这个基于集合的类是专门为有效地处理字符序列而设计的。
Now you can create the appropriate Web services artifacts based on this wrapper class, which internally USES the existing collection-based implementation.
现在，我们可以基于这个包装器类来创建适当的Web服务构件了，它在内部使用现有的基于集合的实现。
DKWorkListICM - This class represents a filtered view (based on criteria such as worknode and priority) for a collection of workpackages.
DKWorkListICM ——这个类代表工作包集合的一个筛选视图（基于工作节点和优先级这样的标准）。
The collection class must provide methods for setting, accessing, and retrieving the event handler delegate based on the event key.
集合类别必须提供方法，根据事件索引键来设定、存取和撷取事件处理常式委派。
The collection class must provide methods for setting, accessing, and retrieving the event handler delegate based on the event key.
集合类别必须提供方法，根据事件索引键来设定、存取和撷取事件处理常式委派。
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