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("33[31;1mHas changed the flight status to 33[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('123','2343')
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 = '404'
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:UsersheshaochuanPycharmProjectspy_s15day8反射	est.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)