练习
请把下面的Student对象的gender字段对外隐藏起来,用get_gender()和set_gender()代替,并检查参数有效性:
# -*- coding: utf-8 -*-
class Student(object):
def __init__(self, name, gender):
self.__name = name
self.__gender = gender
def set_gender(self,gender):
if gender=='male'or gender=='female':
self.__gender=gender
else:
raise TypeError("输入性别错误")
def get_gender(self):
return self.__gender
# 测试:
bart = Student('Bart', 'male')
if bart.get_gender() != 'male':
print('测试失败!')
else:
bart.set_gender('female')
if bart.get_gender() != 'female':
print('测试失败!')
else:
print('测试成功!')
注意:
if gender=='male'or gender=='female':