100个python的基本语法知识下

见贤思齐

50.压缩文件：importzipfilewithzipfile.ZipFile("file.zip","r")aszip_ref:zip_ref.extractall("extracted")123451.数据库操作：importsqlite3conn=sqlite3.connect("my_database.db")cursor=conn.cursor()cursor.execute("CREATETABLEIFNOTEXISTSusers(idINTEGERPRIMARYKEY,nameTEXT)")conn.commit()conn.close()123456752.网络请求：importrequestsresponse=requests.get("https://www.example.com")12353.多线程：importthreadingdefmy_thread():print("Threadrunning")thread=threading.Thread(target=my_thread)thread.start()thread.join()1234567854.多进程：importmultiprocessingdefmy_process():print("Processrunning")process=multiprocessing.Process(target=my_process)process.start()process.join()1234567855.进程池：frommultiprocessingimportPooldefmy_function(x):returnx*xwithPool(5)asp:print(p.map(my_function,[1,2,3]))123456756.队列：fromqueueimportQueueq=Queue()q.put(1)q.put(2)q.get()12345657.协程：importasyncioasyncdefmy_coroutine():awaitasyncio.sleep(1)print("Coroutinerunning")asyncio.run(my_coroutine())123456758.异步IO：importaiohttpimportasyncioasyncdeffetch(url):asyncwithaiohttp.ClientSession()assession:asyncwithsession.get(url)asresponse:returnawaitresponse.text()loop=asyncio.get_event_loop()loop.run_until_complete(fetch("https://www.example.com"))1234567891059.信号处理：importsignaldefhandler(signum,frame):print("Signalhandlercalledwithsignal",signum)signal.signal(signal.SIGINT,handler)12345660.装饰器的实现：defmy_decorator(func):defwrapper(*args,**kwargs):print("Beforefunctioncall")result=func(*args,**kwargs)print("Afterfunctioncall")returnresultreturnwrapper123456761.基于类的装饰器：classMyDecorator:def__init__(self,func):self.func=funcdef__call__(self,*args,**kwargs):print("Beforefunctioncall")result=self.func(*args,**kwargs)print("Afterfunctioncall")returnresult12345678962.模块和包的导入：frommy_packageimportmy_module163.相对导入：from.my_moduleimportmy_function164.集合操作：set1={1,2,3}set2={2,3,4}set1&set2#交集set1|set2#并集set1-set2#差集1234565.集合方法：my_set.add(5)my_set.remove(5)1266.字典方法：my_dict.keys()my_dict.values()my_dict.items()12367.对象方法：classMyClass:defmethod(self):passobj=MyClass()obj.method()12345668.类方法：classMyClassclassmethoddefmethod(cls):pass123469.静态方法：classMyClassstaticmethoddefmethod():pass123470.上下文管理器的实现：classMyContextManager:def__enter__(self):passdef__exit__(self,exc_type,exc_val,exc_tb):passwithMyContextManager():pass12345678971.元类：classMyMeta(type):def__new__(cls,name,bases,dct):returnsuper().__new__(cls,name,bases,dct)12372.装饰器链：@decorator1@decorator2defmy_function():pass123473.属性的getter和setter：classMyClass:def__init__(self,value):self._value=value@propertydefvalue(self):returnself._value@value.setterdefvalue(self,new_value):self._value=new_value123456789101174.文件操作：withopen("file.txt","r")asfile:content=file.read()1275.with语句：withopen("file.txt","r")asfile:content=file.read()1276.yield语句：defmy_generator():yield1yield2yield3123477.生成器表达式：gen=(x**2forxinrange(10))178.列表方法：my_list.append(5)my_list.remove(5)1279.元组解包：a,b,c=(1,2,3)180.字典解包：defmy_function(a,b,c):passmy_dict={'a':1,'b':2,'c':3}my_function(**my_dict)1234581.循环中断：foriinrange(10):ifi==5:break12382.循环跳过：foriinrange(10):ifi==5:continue12383.异步编程：importasyncioasyncdefmy_coroutine():awaitasyncio.sleep(1)asyncio.run(my_coroutine())12345684.类型检查：isinstance(5,int)185.序列化和反序列化：importpickledata={"name":"John","age":30}withopen("data.pkl","wb")asfile:pickle.dump(data,file)withopen("data.pkl","rb")asfile:data=pickle.load(file)1234567886.文件读取模式：withopen("file.txt","r")asfile:content=file.read()1287.文件写入模式：withopen("file.txt","w")asfile:file.write("Hello,World!")1288.上下文管理器：withopen("file.txt","r")asfile:content=file.read()1289.命令行参数解析：importargparseparser=argparse.ArgumentParser(description="Myprogram")parser.add_argument("name",type=str,help="Yourname")args=parser.parse_args()1234590.模块导入：importmy_module191.包导入：frommy_packageimportmy_module192.包的相对导入：from.my_moduleimportmy_function193.动态属性：classMyClass:def__init__(self):self.dynamic_attr="Iamdynamic"12394.动态方法：defdynamic_method(self):return"Iamdynamic"MyClass.dynamic_method=dynamic_method123495.类的单例模式：classSingleton:_instance=None1296.类的工厂模式：classFactory:defcreate(self,type):iftype=="A":returnA()eliftype=="B":returnB()12345697.依赖注入：classService:def__init__(self,dependency):self.dependency=dependency12398.抽象类：fromabcimportABC,abstractmethodclassAbstractClass(ABC)abstractmethoddefmy_method(self):pass12345699.接口：fromabcimportABC,abstractmethodclassInterface(ABC)abstractmethoddefmethod(self):pass12345这些知识点涵盖了Python编程的基本语法和常用功能。希望对你有帮助！