A.对象B.变量C.方法D.函数
A.self ClassName:< statement-1>...< statement-N>B.type ClassName:< statement-1>...< statement-N>C.python ClassName:< statement-1>...< statement-N>D.class ClassName:< statement-1>...< statement-N>
A.classmethodB.staticmethodC.classD.public