目录
1.定义一个Book类：(20分) 定义类属性： count 定义对象属性或变量: title(书名), author(作者), publish(出版社), price(价格) 定义对象相加操作： book1 + book2 = book1.title + book2.title 举例： book1 + book2 = Java程序设计Python程序设计 定义打印对象的输出: 使用print打印 book1 => 书的名字-作者-出版社-价格 举例: print(book1) => Python程序设计-吉米勒-机械出版社-35 定义调用对象的方法：__call__(): 并让其返回书的名字 定义静态方法: static_print_obj: 执行输出print("This is Static Method of class Book") 定义类方法: class_print_obj: 执行输出print("This is class Method of class Book ") 按要求执行底下的操作: 实例化对象book1： Python程序设计, 王铮, 机械教育出版社, 22 实例化对象book2: Java程序设计,, 清华大学出版社, 34 执行book1 + book2： 并输出相加的结果 执行print(book1) 执行 book1() 调用类变量,进行赋值100， 输出类变量 调用book1对象,并修改书名: Python程序设计修改为流畅的Python 调用静态方法 static_print_obj 调用类方法 class_print_obj
2.模拟range的功能
3.定义一个生成器函数：（10分） 传入两个列表: 列表1： ["red", "black", "green"] 列表2: ["S", "M", "L"] 1.调用next返回结果: 调用9次next() 输出结果： (red, S) (red, M) (red, L) ........ (green, L) 2.使用循环去访问生成器: 输出结果： (red, S) (red, M) (red, L) ........ (green, L) 注意循环终止的条件
1.定义一个Book类：(20分)
定义类属性： count
定义对象属性或变量: title(书名), author(作者), publish(出版社), price(价格)
定义对象相加操作： book1 + book2 = book1.title + book2.title
举例： book1 + book2 = Java程序设计Python程序设计
定义打印对象的输出: 使用print打印 book1 => 书的名字-作者-出版社-价格
举例: print(book1) => Python程序设计-吉米勒-机械出版社-35
定义调用对象的方法：__call__(): 并让其返回书的名字
定义静态方法: static_print_obj: 执行输出print("This is Static Method of class Book")
定义类方法: class_print_obj: 执行输出print("This is class Method of class Book ")
按要求执行底下的操作:
实例化对象book1： Python程序设计, 王铮, 机械教育出版社, 22
实例化对象book2: Java程序设计, 清华大学出版社, 34
执行book1 + book2： 并输出相加的结果
执行print(book1)
执行 book1()
调用类变量,进行赋值100， 输出类变量
调用book1对象,并修改书名: Python程序设计修改为流畅的Python
调用静态方法 static_print_obj
调用类方法 class_print_obj
class Book:
count = 10000
def __init__(self, title, author, publish, price):
self.title = title
self.author = author
self.publish = publish
self.price = price
def __add__(self, other):
return self.title + other.title
def __str__(self):
return self.title + "-" + self.author + "-" + self.publish + "-" + str(self.price)
def __call__(self, *args, **kwargs):
return self.title
@staticmethod # 静态方法装饰器
def static_print_obj():
print("This is Static Method of class Book")
@classmethod # 类方法装饰器
def class_print_obj(cls):
print("This is class Method of class Book")
book1 = Book("Python程序设计", "王铮", "机械教育出版社", "22")
book2 = Book("Java程序设计", ", "清华大学出版社", "34")
print(book1 + book2)
print(book1)
print(book1())
Book.count = 100
print(Book.count)
print(book1.count)
book1.title = "流畅的python"
print(book1.title)
book1.static_print_obj()
book2.class_print_obj()
Book.static_print_obj()
Book.class_print_obj()
Python程序设计Java程序设计
Python程序设计-王铮-机械教育出版社-22
Python程序设计
100
100
流畅的python
This is Static Method of class Book
This is class Method of class Book
This is Static Method of class Book
This is class Method of class Book2.模拟range的功能
class MyIterator:
def __init__(self, start=None, stop=None, step=1):
if start is not None and stop is None:
self.stop = start
self.start = 0
if start is not None and stop is not None:
self.start = start
self.stop = stop
self.step = step
def __iter__(self):
return self
def __next__(self):
if self.step > 0:
if self.start < self.stop:
data = self.start
self.start += self.step
return data
else:
raise StopIteration
else:
if self.start > self.stop:
data = self.start
self.start += self.step
return data
else:
raise StopIteration
print([i for i in MyIterator(3)])
print([i for i in MyIterator(1, 4)])
print([i for i in MyIterator(1, 4, 1)])
print([i for i in MyIterator(5, -2, -1)])
print([i for i in MyIterator(5, 2, -1)])
print([i for i in MyIterator(-10, -1, 1)])
print([i for i in MyIterator(-1, -10, -1)])
[0, 1, 2]
[1, 2, 3]
[1, 2, 3]
[5, 4, 3, 2, 1, 0, -1]
[5, 4, 3]
[-10, -9, -8, -7, -6, -5, -4, -3, -2]
[-1, -2, -3, -4, -5, -6, -7, -8, -9]3.定义一个生成器函数：（10分）
传入两个列表:
列表1： ["red", "black", "green"]
列表2: ["S", "M", "L"]
1.调用next返回结果: 调用9次next()
输出结果：
(red, S)
(red, M)
(red, L)
........
(green, L)
2.使用循环去访问生成器:
输出结果：
(red, S)
(red, M)
(red, L)
........
(green, L)
注意循环终止的条件
def gen_num(list_data1, list_data2):
for i in list_data1:
for j in list_data2:
yield i, j
list_data1 = ["red", "black", "green"]
list_data2 = ["S", "M", "L"]
gen = gen_num(list_data1, list_data2)
1.
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
print(next(gen))
2.
for i in gen_num(list_data1, list_data2):
print(i)
('red', 'S')
('red', 'M')
('red', 'L')
('black', 'S')
('black', 'M')
('black', 'L')
('green', 'S')
('green', 'M')
('green', 'L')
('red', 'S')
('red', 'M')
('red', 'L')
('black', 'S')
('black', 'M')
('black', 'L')
('green', 'S')
('green', 'M')
('green', 'L')
