Christian Reyes wrote: > How do I do it? > Is it possible? Since Python does only concern about whether an object can receive the right "messages" (has the right methods), not about type information as more stongly typed languages, there is no type cast feature at all. Upcasts are only needed to satisfy certain interface properties (like in Java, where subclasses can fit interface types or super-types), downcasts are only needed if an upcast took place (like in a Java container, where you always upcast to Object, since there are no templates, only dynamic binding to a single-rooted hierarchy). Casting between different types not directly related has only some sense among primitve types as numbers and strings, which Python supports. Object types either needn't be casted , if they share interface data (otherwise you would need to replace the methods on the data, etc.!). Different "types" should exchange data through messages. Create a new type operating on data handed over to it. And if you really need changing type (or better appearing to have changed type) you should rely on the State Pattern [Gang of Four, Design Patterns], which allows objects to change behaviour if their state changes (similar to type change). All other is foolishness, I'd say, since it is not needed in a well designed program. Please don't take this as an insult! Hope I could help, Ciao, Korpo
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