Python之路第一课Day6--随堂笔记(面向对象编程进阶...未完待续 )

class Dog(object):
    def __init__(self,name):
        self.name = name
    @staticmethod #把eat方法变为静态方法
    def eat(self):
        print("%s is eating" % self.name)
d = Dog("ChenRonghua")
d.eat()

<span style="color: #ff0000;">Traceback (most recent call last):
  File "/Users/jieli/PycharmProjects/python基础/自动化day7面向对象高级/静态方法.py", line 17, in <module>
    d.eat()
TypeError: eat() missing 1 required positional argument: ‘self‘
</span>

class Dog(object):
    def __init__(self,name):
        self.name = name
    @staticmethod
    def eat():
        print(" is eating")
d = Dog("ChenRonghua")
d.eat()

class Dog(object):
    def __init__(self,name):
        self.name = name
    @classmethod
    def eat(self):
        print("%s is eating" % self.name)
d = Dog("ChenRonghua")
d.eat()

Traceback (most recent call last):
  File "/Users/jieli/PycharmProjects/python基础/自动化day7面向对象高级/类方法.py", line 16, in <module>
    d.eat()
  File "/Users/jieli/PycharmProjects/python基础/自动化day7面向对象高级/类方法.py", line 11, in eat
    print("%s is eating" % self.name)
AttributeError: type object ‘Dog‘ has no attribute ‘name‘

class Dog(object):
    name = "Jerry"
    def __init__(self,name):
        self.name = name
    @classmethod
    def eat(self):
        print("%s is eating" % self.name)
d = Dog("ChenRonghua")
d.eat()

#执行结果
Jerry is eating

class Dog(object):
    def __init__(self,name):
        self.name = name
    @property
    def eat(self):
        print(" %s is eating" %self.name)
d = Dog("ChenRonghua")
d.eat()

Traceback (most recent call last):
 ChenRonghua is eating
  File "/Users/jieli/PycharmProjects/python基础/自动化day7面向对象高级/属性方法.py", line 16, in <module>
    d.eat()
TypeError: ‘NoneType‘ object is not callable

d = Dog("ChenRonghua")
d.eat
 
输出
 ChenRonghua is eating

class Flight(object):
    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")


f = Flight("CA980")
f.flight_status

f = Flight("CA980")
f.flight_status
f.flight_status =  2

checking flight CA980 status
flight is arrived...
Traceback (most recent call last):
  File "/Users/jieli/PycharmProjects/python基础/自动化day7面向对象高级/属性方法.py", line 58, in <module>
    f.flight_status =  2
AttributeError: can‘t set attribute

class Flight(object):
    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 = {
: "canceled",
:"arrived",
: "departured"
        }
        print("\033[31;1mHas changed the flight status to \033[0m",status_dic.get(status) )

    @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

print type(f) # 输出：<class ‘__main__.Foo‘>       表示，obj 对象由Foo类创建
print type(Foo) # 输出：<type ‘type‘>              表示，Foo类对象由 type 类创建

class Foo(object):
  
    def func(self):
        print ‘hello alex‘

def func(self):
    print ‘hello wupeiqi‘
  
Foo = type(‘Foo‘,(object,), {‘func‘: func})
#type第一个参数：类名
#type第二个参数：当前类的基类
#type第三个参数：类的成员

#_*_coding:utf-8_*_
__author__ = ‘Alex Li‘
 
 
class MyType(type):
 
    def __init__(self, what, bases=None, dict=None):
        print("--MyType init---")
        super(MyType, self).__init__(what, bases, dict)
 
    def __call__(self, *args, **kwargs):
        print("--MyType call---")
        obj = self.__new__(self, *args, **kwargs)
 
        self.__init__(obj, *args, **kwargs)
 
 
class Foo(object):
 
    __metaclass__ = MyType
 
    def __init__(self, name):
        self.name = name
        print("Foo ---init__")
 
    def __new__(cls, *args, **kwargs):
        print("Foo --new--")
        return object.__new__(cls)
 
 
# 第一阶段：解释器从上到下执行代码创建Foo类
# 第二阶段：通过Foo类创建obj对象
obj = Foo("Jerry")

import importlib
__import__(‘import_lib.metaclass‘) #这是解释器自己内部用的
#importlib.import_module(‘import_lib.metaclass‘) #与上面这句效果一样，官方建议用这个

try:
    pass
except Exception,ex:
    pass

# 未捕获到异常，程序直接报错
 
s1 = ‘hello‘
try:
    int(s1)
except IndexError,e:
    print e

s1 = ‘hello‘
try:
    int(s1)
except IndexError,e:
    print e
except KeyError,e:
    print e
except ValueError,e:
    print e

s1 = ‘hello‘
try:
    int(s1)
except Exception,e:
    print e

s1 = ‘hello‘
try:
    int(s1)
except KeyError,e:
    print ‘键错误‘
except IndexError,e:
    print ‘索引错误‘
except Exception, e:
    print ‘错误‘

try:
    # 主代码块
    pass
except KeyError,e:
    # 异常时，执行该块
    pass
else:
    # 主代码块执行完，执行该块
    pass
finally:
    # 无论异常与否，最终执行该块
    pass

try:
    raise Exception(‘错误了。。。‘)
except Exception,e:
    print e

class WupeiqiException(Exception):
 
    def __init__(self, msg):
        self.message = msg
 
    def __str__(self):
        return self.message
 
try:
    raise WupeiqiException(‘我的异常‘)
except WupeiqiException,e:
    print e

# assert 条件
 
assert 1 == 1
 
assert 1 == 2

#!/usr/bin/env python
#coding:utf-8
import socket
 
def handle_request(client):
    buf = client.recv(1024)
    client.send("HTTP/1.1 200 OK\r\n\r\n")
    client.send("Hello, World")
 
def main():
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.bind((‘localhost‘,8080))
    sock.listen(5)
 
    while True:
        connection, address = sock.accept()
        handle_request(connection)
        connection.close()
 
if __name__ == ‘__main__‘:
  main()