（1)创建一个类People,要求包含属性name和c
（1)创建一个类People,要求包含属性name和city,包含moveto(self,newcity)方法，并且要求People类的对象可以被转换为字符串形式，并且可以按照city属性进行排序。
（2)创建一个People类的子类Teacher类，要求新增属性school,将moveto方法改为newschool,并要求按照school排序。
（3)设计程序，创建4个People对象和4个Teacher对象，并放到列表中进行排序。
答案
class People:
def __init__(self, name, city):
self.name = name
self.city = city
def moveto(self, newcity):
self.city = newcity
# 对象转字符串
def __str__(self):
return f"People(name:{self.name}, city:{self.city})"
# 按city排序，小于比较
def __lt__(self, other):
return self.city < other.city
class Teacher(People):
def __init__(self, name, city, school):
super().__init__(name, city)
self.school = school
# 重写moveto，改名为newschool
def newschool(self, new_school):
self.school = new_school
def __str__(self):
return f"Teacher(name:{self.name}, city:{self.city}, school:{self.school})"
# Teacher按school排序
def __lt__(self, other):
return self.school < other.school
# (3) 创建4个People，4个Teacher，放入列表
lst = [
People("张三", "Beijing"),
People("李四", "Shanghai"),
People("王五", "Guangzhou"),
People("赵六", "Shenzhen"),
Teacher("张老师", "Nanjing", "No.1 High"),
Teacher("李老师", "Wuhan", "No.3 High"),
Teacher("王老师", "Chengdu", "No.2 High"),
Teacher("刘老师", "Hangzhou", "No.5 High")
]
# 注意：直接sort会因为People按city、Teacher按school，__lt__逻辑不一样，同类内部排序演示：
people_list = lst[:4]
teacher_list = lst[4:]
print("---People按city排序---")
people_list.sort()
for p in people_list:
print(p)
print("\n---Teacher按school排序---")
teacher_list.sort()
for t in teacher_list:
print(t)
# 测试moveto / newschool方法
p1 = People("小明", "Tianjin")
p1.moveto("Chongqing")
print("\nmoveto测试：", p1)
t1 = Teacher("陈老师", "Xi'an", "A中学")
t1.newschool("B中学")
print("newschool测试：", t1)