作业1
"""
1.声明一个电脑类：
属性：品牌、颜色、内存大小
方法：打游戏、写代码、看视频
"""
class Computer:
def __init__(self, brand='', color='',memory=''):
self.brand = brand
self.color = color
self.memory = memory
@staticmethod
def play_game():
print('打游戏')
@staticmethod
def write_code():
print('写代码')
@staticmethod
def watch_video():
print('看视频')
if __name__ == '__main__':
"""
a.创建电脑类的对象，然后通过对象点的方式获取、修改、添加和删除它的属性
b.通过attr相关方法去获取、修改、添加和删除它的属性
"""
comp1 = Computer('Apple', 'black', '16GB')
print(comp1.brand, comp1.color, comp1.memory)
print('==',getattr(comp1, 'brand'),getattr(comp1, 'color'),getattr(comp1, 'memory'))
comp1.memory = '8GB'
print(comp1.memory)
setattr(comp1, 'memory', '4GB')
print('==', comp1.memory)
comp1.size = '15英寸'
print(comp1.size)
setattr(comp1, 'weight', '1kg')
print('==', comp1.weight)
del comp1.size
# print(comp1.size)
delattr(comp1, 'weight')
# print(comp1.weight)
>>>
Apple black 16GB
== Apple black 16GB
8GB
== 4GB
15英寸
== 1kg
作业2
"""
2.声明一个人的类和狗的类：
狗的属性：名字、颜色、年龄 狗的方法：叫唤
人的属性：名字、年龄、狗 人的方法：遛狗
a.创建人的对象小明，让他拥有一条狗大黄，然后让小明去遛大黄
"""
class Dog:
"""狗类"""
def __init__(self, name='', color='', age=0):
self.name = name
self.color = color
self.age = age
def call(self):
print('%s叫唤' % self.name)
class Person:
"""人类"""
def __init__(self, name='', age=0, dog=[]):
self.name = name
self.age = age
self.dog = dog
def walk_dog(self):
print('%s正在遛%s' % (self.name, self.dog.name))
if __name__ == '__main__':
dog1 = Dog('大黄', 'yellow', 2)
p1 = Person('小明', 18, dog1)
p1.walk_dog()
>>>
小明正在遛大黄
作业3
"""
3.声明一个矩形类：
属性：长、宽 方法：计算周长和面积
a.创建不同的矩形，并且打印其周长和面积
"""
class Rect:
def __init__(self, length=0, width=0):
self.length = length
self.width = width
def perimeter(self):
return 2 * (self.length + self.width)
def acre(self):
return self.length * self.width
if __name__=='__main__':
r1 = Rect(10, 5)
print('r1的周长为：%d, 面积为：%d' % (r1.perimeter(), r1.acre()))
r2 = Rect(20, 7)
print('r2的周长为：%d, 面积为：%d' % (r2.perimeter(), r2.acre()))
r3 = Rect(11, 11)
print('r3的周长为：%d, 面积为：%d' % (r3.perimeter(), r3.acre()))
>>>
r1的周长为：30, 面积为：50
r2的周长为：54, 面积为：140
r3的周长为：44, 面积为：121
作业4
"""
4.创建一个学生类：
属性：姓名，年龄，学号 方法：答到，展示学生信息
创建一个班级类：
属性：学生，班级名 方法：添加学生，删除学生，点名
"""
class Student:
def __init__(self, name='', age=0, id=''):
self.name = name
self.age = age
self.id = id
def reach(self):
print('%s:到' % self.name)
@classmethod
def show_info(cls):
print(cls.name, cls.age, cls.id)
def __str__(self):
return 'name:%s, age:%d, id:%s' % (self.name, self.age, self.id)
class Class:
def __init__(self, name='', students=[]):
self.name = name
self.students = students
def add_student(self):
print('添加学生')
name = input('name:')
age = int(input('age:'))
id = input('id:')
stu = Student(name, age, id)
self.students.append(stu)
def del_student(self):
print('删除学生')
name = input('name')
flag = True
index_list = []
for index in range(0, len(self.students)):
if name == self.students[index].name:
flag = False
print(index, self.students[index])
index_list.append(index)
if flag:
print('没有找到')
else:
del_index = int(input('请输入要删除学生的下标：'))
if del_index in index_list:
del self.students[del_index]
print('删除成功')
else:
print('下标输入错误')
def roll_call(self):
name = input('请输入要点名的名字：')
for item in self.students:
if name == item.name:
print(item)
item.reach()
if __name__=='__main__':
# stu1 = Student('xxx', 18, '123')
cla1 = Class('py1805')
print(type(cla1.students))
print(cla1.name, cla1.students)
cla1.add_student()
print(cla1.name, cla1.students)
cla1.add_student()
print(cla1.name, cla1.students)
cla1.del_student()
print(cla1.name, cla1.students)
cla1.roll_call()
>>>
<class 'list'>
py1805 []
添加学生
name:aa
age:1
id:1
py1805 [<__main__.Student object at 0x021D6430>]
添加学生
name:bb
age:2
id:2
py1805 [<__main__.Student object at 0x021D6430>, <__main__.Student object at 0x021D6470>]
删除学生
namebb
1 name:bb, age:2, id:2
请输入要删除学生的下标：1
删除成功
py1805 [<__main__.Student object at 0x021D6430>]
请输入要点名的名字：aa
name:aa, age:1, id:1
aa:到
作业5
"""
5.写一个类，封装所有和数学运算相关的功能（包含常用功能和常用值，例如：pi,e等）
"""
import math
class MathOperation:
pi = math.pi
e = math.e
def add(self, *number):
sum = 0
for item in number:
sum += item
return sum
def sub(self, *number):
dif = number[0]
for index in range(1, len(number)):
dif -= number[index]
return dif
def mul(self, *number):
mul1 = number[0]
for index in range(1, len(number)):
mul1 *= number[index]
return mul1
if __name__=='__main__':
num1 = [20, 5, 100]
oper1 = MathOperation()
print(oper1.pi, oper1.e)
print(oper1.add(*num1))
print(oper1.sub(*num1))
print(oper1.mul(*num1))
>>>
3.141592653589793 2.718281828459045
125
-85
10000
作业6
"""
6.写一个班级类，属性：班级名、学生；功能：添加学生、删除学生、根据姓名查看学生信息，展示班级的所有学生信息
"""
class Class:
def __init__(self, name='', students=[]):
self.name = name
self.students = students
def add_student(self):
print('添加学生')
num = int(input('请输入添加学生人数：'))
for count in range(num):
name = input('name:')
age = int(input('age:'))
stu = {'name':name, 'age':age}
self.students.append(stu)
def del_student(self):
print('删除学生')
name = input('name')
flag = True
index_list = []
for index in range(0, len(self.students)):
if name == self.students[index]['name']:
flag = False
print(index, self.students[index])
index_list.append(index)
if flag:
print('没有找到')
else:
del_index = int(input('请输入要删除学生的下标：'))
if del_index in index_list:
del self.students[del_index]
else:
print('下标输入错误')
def look_student(self):
print('查看学生')
name = input('请输入要查看的学生名字：')
flag = True
for item in self.students:
if name == item['name']:
flag = False
print(item)
if flag:
print('没有找到')
def show_info(self):
for item in self.students:
print(item)
if __name__=='__main__':
stu = {'name':'xxx', 'age':18}
stu1 = []
stu1.append(stu)
cla1 = Class('py1805', stu1)
cla1.add_student()
cla1.del_student()
cla1.look_student()
print('=========')
cla1.show_info()
>>>
添加学生
请输入添加学生人数：2
name:aa
age:1
name:bb
age:2
删除学生
namebb
2 {'name': 'bb', 'age': 2}
请输入要删除学生的下标：2
查看学生
请输入要查看的学生名字：aa
{'name': 'aa', 'age': 1}
=========
{'name': 'xxx', 'age': 18}
{'name': 'aa', 'age': 1}
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