def nullInfo(self):
    nulllist = list()
    for col in filter((lambda x: (x.name[:4] == u'null')), inspect(self.__class__).columns):
        nulllist.append(dict(ratio=getattr(self, col.name), name=col.name[5:]))
    return nulllist
def nullInfo(self):
    nulllist = list()
    for col in filter((lambda x: (x.name[:4] == u'null')), inspect(self.__class__).columns):
        nulllist.append(dict(ratio=getattr(self, col.name), name=col.name[5:]))
    return nulllist