def ascolumnlist(self):
        return [expression.UnnamedAttributeRef(i) for i in xrange(len(self))]
Return newly added |_Relationship| instance of *reltype* between this
dataset/ETHPy150Open uwescience/raco/raco/scheme.py/Scheme.ascolumnlist--crossover with--dataset/ETHPy150Open python-openxml/python-docx/docx/opc/package.py/OpcPackage.load_rel