translating line of code from C# to IronPython

I need to convert this line of code from an asp.net c# page to开发者_开发问答 asp.net IronPython, how would it be?

((IPostBackEventHandler)Button1).RaisePostBackEvent(null);

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Probably Button1.RaisePostBackEvent(None).

Python, being a dynamic language, doesn't need the type specified, as it has no notion of casting. And null in Python is spelled None.