Part 1:Python学习笔记
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7.包与模块管理
7.1.模块
7.2.指令
7.2.1.import
1 import math 2 import models 3 import views 4 5 print('hello') 6 7 def hello(): 8 print(models.page) 9 hello() 10 if __name__ == "__main__": 11 views.test()
7.2.2.from
- 示例1
1 import math 2 from models import page 3 print('hello') 4 5 def hello(): 6 print(page) 7 8 hello()
- 示例2
1 import math 2 from models import * 3 print('hello') 4 5 def hello(): 6 test() 7 8 hello()
- 示例3
1 from models import test as m_test 2 from views import test as v_test 3 4 m_test() 5 v_test()
7.2.3. import importlib; importlib.reload(模块)
7.3.包
7.3.1. __init__ 初始化文件
7.4.使用原因
7.4.1.代码重用
7.4.2.命名空间
7.4.3.实现数据或服务共享
7.5. 步骤
7.5.1. 找到模块文件
7.5.2. 编译为字节码
7.5.3. 运行模块文件
7.6.搜索范围
7.6.1. 当前程序主目录
7.6.2. 环境变量
7.6.3. 标准库
7.6.4. 第三方安装库-扩展库
8.面向对象编程
8.1.步骤
8.1.1.OOA 面向对象分析
- 1. 分析对象-万物皆对象
- 2. 类定义对象代码模板(模板)-将分析的对象变为代码
- 3. 实例化(内存对象)
8.1.2.OOD 面向对象设计
8.1.3.OOP 面向对象编程
8.2.实现
8.2.1.1. 分析对象特征和行为
8.2.2.2. 写类描述模板对象
8.2.3.3. 实例化,模拟过程
8.3.案例1
1 title = 'Python ru men' 2 price = 39.00 3 author = "Peter" 4 5 def search_book(title): 6 print('Search the book key words {} book'.format(title)) 7 8 9 book = { 10 'title':'Python rumen', 11 'price':39.00, 12 'author':'Peter', 13 'search_book':search_book 14 } 15 16 print(book['title']) 17 print(book.get('price',0.0)) 18 book.get('search_book')('Python')
8.3.案例2
1 import datetime 2 3 class Book: 4 def __init__(self,title,price,author,publisher,pubdate): 5 self.title = title 6 self.price = price 7 self.author = author 8 self.publisher = publisher 9 self.pubdate = pubdate 10 11 def __repr__(self): 12 return '<Book {} at 0x{}>'.format(self.title,id(self)) 13 14 def print_info(self): 15 print('The book information is as follows:') 16 print('title:{}'.format(self.title)) 17 print('price:{}'.format(self.price)) 18 print('author:{}'.format(self.author)) 19 print('publisher:{}'.format(self.publisher)) 20 print('pubdate:{}'.format(self.pubdate)) 21 22 23 book1 = Book('C#',29.9,'Tom','Youpinketang',datetime.date(2016,3,1)) #A real object 24 25 book1.print_info()
Part 2:Python学习注意点
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1. 第一步:分析对象
2. 第二步:写类
3. 第三部:实例化,创建对象