Python之路，day8-Python基础

***面向对象的好处***
    更容易扩展、提高代码使用效率，使你的代码组织性更强，更清晰
    更适合复杂项目的开发

    封装
        把功能的实现细节封装起来，只暴露调用接口
    继承

     多态
        接口继承

     定义
        类----》模板
        对象---》实例化的模板

        属性
            私有属性 __private
            公有属性 存在类的内存里，所有势力共享
            成员属性 ---》实例变量
        方法 ---》函数
        构造函数
        析构函数：实例销毁时，自动执行

静态方法
类方法
属性方法

 class Flight(object):
     '''我是类的注释'''
     def __init__(self, name):
         self.flight_name = name

     def checking_status(self):
         print("checking flight %s status " % self.flight_name)
         return 1
     @property
     def flight_status(self):
         status = self.checking_status()
         if status == 0:
             print("flight got canceled...")
         elif status == 1:
             print("flight is arrived...")
         elif status == 2:
             print("flight has departured already...")
         else:
             print("cannot confirm the flight status...,please check later")

     @flight_status.setter  # 修改
     def flight_status(self, status):
         status_dic = {
             0: "canceled",
             1: "arrived",
             2: "departured"
         }
         print("\033[31;1mHas changed the flight status to \033[0m", status_dic.get(status))

     def __call__(self, *args, **kwargs):
         print('--call:',args,kwargs)

     @flight_status.deleter  # 删除
     def flight_status(self):
         print("status got removed...")

 f = Flight("CA980")
 # f.flight_status
 # f.flight_status = 2  # 触发@flight_status.setter
 # del f.flight_status  # 触发@flight_status.deleter
 f('','')
 print(f.__doc__)
 print(f.__module__)
 print(f.__class__)

***异常处理***
    一、基本异常处理结构
        try：
            代码块
        except Exception as e：
            将错误信息输出写入日志文件

    二、复杂结构
        try：
            。。。
        except：
            。。。
        else：
            。。。
        finally
            。。。
    三、异常对象
        try：
            代码块
        except Exception as e：#python内部将错误信息封装到e对象中
            将错误信息输出写入日志文件
    四、 异常种类
        Exception，能将所有的异常都捕获
        。。。
        其他的处理方法，只能处理某一情况
        try：
            代码块
        except Exception as e：#python内部将错误信息封装到e对象中
            将错误信息输出写入日志文件

        try:
            int('asdd')
            list = [1,2]
            list[1]
        except IndexError as e:
            pass
        except Exception as e:
            pass
        else:
            print('else')
        finally:
            print('finally')
======>Exception,其他错误的关系
        继承关系
五、主动触发异常

六、断言
assert条件

七、自定义异常

反射
    hashattr(容器，名称)#
app.py

 import os
 import sys

 BASE_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)))
 sys.path.append(BASE_DIR)
 from controller import account

 action = input('>>')
 if hasattr(account,action):
     func = getattr(account,action)
     result =func()
 else:
     result = ''
 print(result)

account.py

 def login():
     return '请输入永户名密码'
 def logout():
     return '跳转回登陆界面'

***socket***

server.py

 import socket
 import os
 import sys
 server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 server.bind(('0.0.0.0',8000))
 server.listen(5)
 print('start listen')
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.append(BASE_DIR)
 new_size = 0
 while True:
     conn,client_addr = server.accept()
     print(conn,client_addr)
     num = 0
     while True:
         try:
             data = conn.recv(1024)
             if num == 0:
                 filename = data.decode()
             if num == 1:
                 total_size = int(data.decode())
             if num >= 2:
                 print(filename,'这什么情况')
                 with open(filename,'ab') as f:
                     new_size = os.path.getsize(r'%s' % filename)
                     f.write(data)
             print('recv from client:',filename)
             conn.send(b'got your message')
             num += 1
         except Exception as e:
             break

client.py

 import socket
 import os
 import sys
 import re
 # BASE_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)))
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.append(BASE_DIR)
 print(sys.path)
 print(BASE_DIR)
 client = socket.socket()
 client.connect(('localhost',8000))
 while True:
     input_str = input('[put filename]>>').strip()
     input_list = re.split(' ',input_str)
     msg = input_list[1]
     if input_list[0] != 'put':
         print('command error:',input_list[0],'input [put filename] command')
         continue
     if r'\\' not in msg:
         if os.path.exists(msg):
             filename = msg
         else:
             print('not found file')
             continue
     else:
         filename = msg
     length_file = os.path.getsize(r'C:\Users\heshaochuan\PycharmProjects\py_s15\day8\反射\test.py')
     length_file_str = '%s'%length_file
     if len(filename) == 0:continue
     client.send(filename.encode())
     print('send',filename)
     data = client.recv(1024)
     if data:
         client.send(length_file_str.encode())
         data1 = client.recv(1024)
         if data1:
             with open(filename, 'rb') as f:
                 for i in f:
                     client.send(i)
                     data2 = client.recv(1024)
                 print('recv from server:',data2)