Python

#!/usr/bin/python#-*-Coding:utf-8-*-Import MySQLdbImport SmtplibFrom Email.mime.text import MimetextFrom Email.header Import HeaderImport timeDate = Time.strftime ('%y-%m-%d ')# Open Database connectionconn = MySQLdb.connect (host= ' localhost

New () is a newly emerging method in the modern class that, before the constructor init () constructs an instance, it is understood that the constructor init () that exists in the class in Python is responsible for instantiating the class, and

1. Tuple OperationBefore we define a variable, it is best to declare the type of the variable, asl=list() # l为列表print(l)t=tuple() # t为元组print(t)When we define the same element, different ways of writing will get

This article about multithreading tools, is very suitable for novice learning, tool efficiency is also very high, the code is relatively perfect, title. This article I spring signed writer--aedoo 0x00 PrefaceI published the original

1, Reflection Reflection: Use the name of the string type to manipulate the variable reflection there is no security problem, to manipulate the existing variables in memory #反射对象中的属性和方法class A: price =20print(GetAttr (A,'price'))#反射对象的属性class A:

The Python language inherits the traditional C language for time, and the time value is a floating-point number in seconds, recorded in seconds from January 1, 1970 0 o'clock to the present, which can be converted to the date and time of our daily

It's a bit more advanced here, and it's a little interesting to learn here, but I've seen the similarities with other languages.higher-order functions are called higher-order functions by passing other functions as parameters.defAdd (x, Y,

1. List slicesnames = ["Fengxiaoli", "CX", "#wang", "3bin", ["Dudu", "Longlong"], "Fengye", "CX"]print (Names[0],names[1]) print (names[ 0:2]) print (Names[:2]) print (names[-1]) print (names[-3:-1]) print (names[-3:]) print (Names[0:-1:2]) #0开头, 1

1. Compile-type:Compile the source code all at once into binary. CAdvantages: High execution efficiency.Disadvantage: Development efficiency is slow, can not be used across platforms.Explanatory type:When the program executes, the code is

Double Down method__str__ and __repr__Changing the object's string display __str__,__repr__obj.__str__ Str (obj)obj.__repr__ repr (obj)classTeacher:def __init__(self,name,salary): Self.name=name Self.salary=Salarydef __str__(self):return "Teacher '

First, IntroductionThe regular expression itself is a small, highly specialized programming language, and in Python, the Cheng can be called directly to implement regular matching by embedding the re module in the embedded form. The regular

Method Method Describe Re.compile (Pattern[,flag]) Compile regular expressions to generate pattern instances Re.match (Pattern, string, flags=0) Try to match a pattern from the beginning

socket_server_ssh.py#!usr/bin/env python#-*-Coding:utf-8-*-__author__ = "Samson"Import socketImport OSServer = Socket.socket (socket.af_inet,socket. SOCK_STREAM)Server.bind (("localhost", 6969))Server.listen ()While True: CONN,ADDR =

　　What to learn: Computer History Linux commands ComputerComputer), commonly known as computer, is a high-speed computing computer, can be used for data processing, data statistics, numerical calculation, logic calculation, with

#-*-coding:utf-8-*-#!/usr/bin/pythonimport sysreload (SYS) # Reload to invoke Setdefaultencoding method Sys.setdefaultencoding ( ' Utf-8 ') # set ' utf-8 ' Import mysqldbimport houtai_dbnamefrom email.mime.text import mimetextfrom email.header

1, the lecture sequence is decomposed into separate variablesp= (4,5) x, y=pPrint(x, y)If you want to discard certain values in the decomposition, you can use _ todata=['A','B','C',' D ' ]_,name,age,_=dataPrint(_)print(name) Print(age)2. Decompose

#!/bin/bashRm-rf/data/website/activities/virtualenvVirtualenv--no-site-packages-p python3/data/website/activities/virtualenvSource/data/website/activities/virtualenv/bin/activatePip Install-r/data/website/activities/source/requirements.txtRm-rf/data/

1, Ipy IntroductionIP address planning is a very important link in network design, the quality of planning will directly affect the efficiency of the routing protocol algorithm, including network performance, scalability, etc., in this process, it

. log#!/usr/bin/python27#-*-coding:utf-8-*-Filelist1=os.listdir ('/var/log') Example1:s1='Hello.log'>>>s1.endswith ('. Log')>>>Trueexample2: Find all the files in Filelist1 that end with log filelist2=[i forIinchFilelist1ifI.endswith ('. Log')]

There are a lot of good third-party libraries in Python, now record the libraries and how to download them.First, virtualenv, this is a production environment can be isolated from the Python library, very usefulUse pip install virtualenv under