0.定义一个学生类。有属性：姓名、年龄、成绩（语文，数学，英语)[每课成绩的类型为整数]
方法：
a. 获取学生的姓名：getname()
b. 获取学生的年龄：getage()
c. 返回3门科目中最高的分数。get_course()
class Student:
def __init__(self):
self._name = ''
self._age = 0
self._score = {}
@property
def getname(self):
return self._name
@getname.setter
def name(self, name):
if not isinstance(name, str):
raise ValueError
if not (2 <= len(name) <= 4):
raise ValueError
self._name = name
@property
def getage(self):
return self._age
@getage.setter
def age(self, age):
if not isinstance(age, int):
raise ValueError
if not (0 <= age <= 100):
raise ValueError
self._age = age
@property
def getscore(self):
return self._score
@getscore.setter
def score(self, score: dict):
for key in score:
if not isinstance(score[key], int):
raise ValueError
if not (0 <= score[key] <= 100):
raise ValueError
self._score = score
def get_course(self):
value_list = self._score.values()
return max(value_list)
def main():
stu1 = Student()
stu1.name = '张三'
stu1.age = 18
stu1.score = {'语文': 60, '数学': 90, '英语': 85}
print(stu1.getname)
print(stu1.getage)
print(stu1.get_course())
if __name__ == '__main__':
main()
1.建立一个汽车类Auto，包括轮胎个数，汽车颜色，车身重量，速度等成员变量，并通过不同的构造方法创建实例。
至少要求 汽车能够加速 减速 停车。
再定义一个小汽车类CarAuto 继承Auto 并添加空调、CD等成员变量 覆盖加速 减速的方法
class Auto:
def __init__(self, color, weight):
self.tyre_number = 4
self.color = color
self.weight = weight
self._speed = 0
@staticmethod
def speed_up():
print('汽车加速')
@staticmethod
def speed_down():
print('汽车减速')
@staticmethod
def stop():
print('汽车停车')
@property
def speed(self):
return self._speed
@speed.setter
def speed(self, speed):
if not (0 <= speed <= 300):
raise ValueError
self._speed = speed
def __gt__(self, other):
return self.speed > other
class CarAuto(Auto):
def __init__(self, color, weight):
super().__init__(color, weight)
self.air_conditioner = '有'
self.CD = '有'
@staticmethod
def speed_up():
print('小汽车加速了')
@staticmethod
def speed_down():
print('小汽车减速了')
def main():
auto = Auto('黑色', '5T')
auto.speed = 100
print(auto.tyre_number, auto.color, auto.weight, auto.speed)
change_speed = int(input('请输入新的速度：'))
if change_speed == 0:
Auto.stop()
auto.speed = change_speed
print(auto.speed)
elif auto.speed > change_speed:
Auto.speed_down()
auto.speed = change_speed
print(auto.speed)
else:
Auto.speed_up()
auto.speed = change_speed
print(auto.speed)
carauto = CarAuto('白色', '3T')
carauto.speed = 100
print(carauto.tyre_number, carauto.color, carauto.weight, carauto.speed, carauto.air_conditioner, carauto.CD)
change_speed = int(input('请输入新的速度：'))
if carauto.speed > change_speed:
CarAuto.speed_down()
carauto.speed = change_speed
print(carauto.speed)
else:
CarAuto.speed_up()
carauto.speed = change_speed
print(carauto.speed)
if __name__ == '__main__':
main()
2.创建一个名为User 的类，其中包含属性firstname 和lastname ，还有用户简介通常会存储的其他几个属性。
在类User 中定义一个名 为describeuser() 的方法，它打印用户信息摘要;
再定义一个名为greetuser() 的方法，它向用户发出个性化的问候。
管理员是一种特殊的用户。编写一个名为Admin 的类，让它继承User类。
添加一个名为privileges 的属性，用于存储一个由字符串(如"can add post"、"can delete post"、"can ban user"等)组成的列表。
编写一个名为show_privileges()的方法，它显示管理员的权限。创建一个Admin 实例，并调用这个方法。
class User:
def __init__(self, firstname='', lastname='', age=0, sex='', tel=0):
self._firstname = firstname
self._lastname = lastname
self._age = age
self._sex = sex
self._tel = tel
@property
def firstname(self):
return self._firstname
@firstname.setter
def firstname(self, firstname):
if not (1 <= len(firstname) <= 2):
raise ValueError
self._firstname = firstname
@property
def lastname(self):
return self._lastname
@lastname.setter
def lastname(self, lastname):
if not (1 <= len(lastname) <= 2):
raise ValueError
self._lastname = lastname
@property
def age(self):
return self._age
@age.setter
def age(self, age):
if not (0 <= age <= 100):
raise ValueError
self._age = age
@property
def sex(self):
return self._sex
@sex.setter
def sex(self, sex):
self._sex = sex
@property
def tel(self):
return self._tel
@tel.setter
def tel(self, tel):
if not len(str(tel)) == 11:
raise ValueError
self._tel = tel
def describeuser(self):
print('姓名：' + self.firstname + self.lastname + ' ' + '年龄:' + str(self.age) + ' ' + '性别：' + self.sex + ' ' +
'电话：' + str(self.tel))
def greetuser(self):
print('hello! %s' % self.firstname + self.lastname)
class Admin(User):
def __init__(self, firstname='', lastname='', age=0, sex='', tel=0, privileges=[]):
super().__init__(firstname, lastname, age, sex, tel)
self.privileges = privileges
def show_privileges(self):
for item in self.privileges:
print('%s %s' % (self.firstname + self.lastname, item))
def main():
user = User()
firstname = input('请输入姓：')
user.firstname = firstname
lastname = input('请输入名：')
user.lastname = lastname
age = int(input('请输入年龄：'))
user.age = age
sex = input('请输入性别：')
user.sex = sex
tel = int(input('请输入电话：'))
user.tel = tel
user.describeuser()
user.greetuser()
admin = Admin()
firstname = input('请输入姓：')
admin.firstname = firstname
lastname = input('请输入名：')
admin.lastname = lastname
age = int(input('请输入年龄：'))
admin.age = age
sex = input('请输入性别：')
admin.sex = sex
tel = int(input('请输入电话：'))
admin.tel = tel
admin.privileges = ['can add post', 'can delete post', 'can ban user']
admin.show_privileges()
if __name__ == '__main__':
main()
3.创建一个Person类，添加一个类字段用来统计Perosn类的对象的个数
class Person:
num = 0
def __init__(self):
self.name = '张三'
Person.count()
@classmethod
def count(cls):
cls.num += 1
return cls.num
def main():
p1 = Person()
print(Person.num)
p2 = Person()
print(Person.num)
p3 = Person()
print(Person.num)
if __name__ == '__main__':
main()