This view takes in a list of lists and a function. Each sublist defines a set of row or column keys to merge using the passed function. Rows and columns which are not in any of the lists are passed through as is, though their relative order may have changed.

__init__ (
        self,
        dataset,
        keylist=[],
        function=None,
        )

getData ( self,  key=None )

getNumCols ( self )

getNumRows ( self )

setFunction ( self,  function )

setKeylist ( self,  keylist=[] )