#A 加限制实例属性，类方法用MethodType绑定 class Student1(object): slots = ('name', 'age')#指定实例可用的属性 s1 = Student1()#实例化 s2 = Student1() s1.name = 'zhangsan'#动态绑定属性 s2.age = 'lisi'#动态绑定属性 def set_info(self, m, n): self.height = m self.weight = n from types import MethodType Student1.set_info = MethodType(set_info, Student1)#给类绑定方法并赋值给class.set_info s1.set_info('175cm', '65kg')#调用方法 s2.set_info('180cm', '80kg') print (s1.name, s2.age) print (s1.height, s2.weight)

#B 不加实例属性限制slots，类方法不用MethodType绑定 class Student2(object): pass s3 = Student2() s4 = Student2() s3.name = 'zhangsan' s4.age = 'lisi'

#动态绑定方法 def new_info(self, x, y): self.height = x self.weight = y return ('%s, %s') % (x, y) Student2.new_info = new_info s3.new_info('175cm', '65kg') s4.new_info('180cm', '80kg') print (s3.name, s4.age) print (s3.height, s4.weight)

#C 加实例属性限制，类方法不用MethodType绑定 class Student3(object): slots = ('name', 'age') s5 = Student3() s6 = Student3() s5.name = 'zhangsan' s6.age = 'lisi' def creat_info(self, z, t): self.height = z self.weight = t return '%s, %s' % (z, t) Student3.creat_info = creat_info s5.creat_info('175cm', '65kg') s6.creat_info('180cm', '80kg') print (s5.name, s6.age) print (s5.weight, s6.height) 报错

总结 加slots 实例属性限制后，给类绑定方法要用MethodType