def __getslice__(self, start, end):
        '''
            __getslice__ - Return a "slice" (subset) of the current collection.

            Returns a copy
        '''
        return self.__class__(list.__getslice__(self, start, end))
def __getslice__ ( self , start , end ) : return self . __class__ ( list . __getslice__ ( self , start , end ) )
__getslice__ - Return a "slice" (subset) of the current collection.

            Returns a copy