Hi! 

I want to develop a futures strategy. I've cloned the QuandlImporterAlgorithm to get continuous futures from the SCF data set.  However, there is an error because the object doesn't have a 'close' attribute but 'settle' instead. I've found the solution written in C#, i.e. writing a subclass. How would something like this look like in Python? I'd greatly appreciate your help.

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