Python

Test16 test Code #-*-coding:utf-8-*-from sys import argvscript, filename = argvprint "We ' re gogning to erase%r." % flienameprint "If you don ' t want that, hit Ctrl-c (^c)." Print "If you want this, hit RETURN." #打开文件target =open (filename, ' W ')

Super is used to solve multiple inheritance problems, it is not a problem to call the parent class directly with the class name when using single inheritance, but if multiple inheritance is used, it involves various problems such as lookup order

What is a variable#变量即变化的量, the core is the word "change" and "quantity", change is changed, the amount is measured state.Why do we have variables#程序执行的本质就是一系列状态的变化, change is the direct embodiment of program execution, so we need to have a

#print (ABS ( -5))                         #取绝对值 # print (Bin (4)  )                        #把数字转成二进制格式 #  Print (bool ())                         #判断真假, 0 is False, 1 is true, vacancy is false, non-empty is true # print (Chr (98))                   

Function: Format output logFive levels debug,info,waring,error,critical, default print waring above level input, can be changed.Default instance is root, do not use default instance when recommended Import loggingimport SYS uses a new instance: #

#!/usr/bin/env python# -*- coding: utf-8 -*-#导入smtplib和MIMETextimport   Smtplibfrom email.header import headerfrom email.mime.text import mimetextdef  send_server (to_list,sub,content):     #设置服务器, username, password, and suffix of the mailbox     

Class Node: #节点类Next = The none# node pointer points to the nextdef __init__ (Self,data):Self.data=data------------------------------------------Class Queue:First = Node (None) #头节点Last = Node (None) #尾节点def inQueue (self,node): #进队列If

The following code implements the process: CDP--and get the corresponding link information--automatic write-in device corresponding to the port--->configure save-->configure Backup to the TFTP

Basic concepts Object-oriented Universal Object Oriented Programming abbreviation OOP is a kind of programming idea. is to use the object as a basic unit of a program, to encapsulate the data and functions inside, to achieve good

Because of the existence of circular references, after we have deleted A and B, the reference count is 1, so that the existing garbage collection mechanism is never possible to remove them. They will always exist in memory.We certainly can't ignore

Jumpserver-open-source Springboard-Bastion Machine-official website http://www.jumpserver.org/Github-jumpserver/jumpserver: Open source Springboard machine (Fortress machine): Certification, authorization, audit, automated operations (open source

JSON facilitates the interaction of data between different programming languagesJSON serializationJSON serialization of data#-*-Coding:utf-8-*-__author__ = "MuT6 sch01ar" Import jsoninfo = { ' name ': ' John ', ' age ': ', ' sex ': ' Male ',

The constructor of this class is executed by default when a Python class is instantiated _init_ 1 class Rectangle: 2 def __ init__ (Self,x,y): 3 self.x=x 4 self.y=y 5 def Getarea (self): 6 return self.x * self.y 7 r = Rectangle (

python2.7 cannot be identified in the registryCreate a new register.py fileImport SYS from_winreg Import *# Tweak asnecessaryversion= sys.version[:3]installpath=Sys.prefix Regpath="software\\python\\pythoncore\\%s\\"%(version)

Append file Contents mode = A will be appended to the contents of the file ab is added in binary modeFiles opened with R are not able to perform a read operationMixed Mode r+ read first and write similar to appendw+ write-in mode will erase the

The tuple (typle) list has no subtraction and division, but it has addition and multiplication.1, addition, that is, the addition of elements. Only list and tuple can be added, not other types.t= (1,) + (2, 3, 4) print (T, type (t))Output to(1, 2, 3,

1 classDog (object):2N=1233Name='class variable name'4n_list=[]5 6 def __init__(self,name,life_value=100):#Pass Parameters7Self.name=name8Self.__life_value=Life_value9 Ten def __del__(self): One Print("%s Dead"%self.name) A -

First, set up a class to hold the global dataclass GlobalVar: def __init__(self): self.DB_CONFIG = {} self.table_name = ‘‘ # 表名 ...When invoked, from the main module, create an instance:def main(self): gv = GlobalVar() gv.table_name =

Batch detection of weak passwords and goaheaddigest I recently learned how to use python to write crawler tools. One day, I accidentally found that the logon method of the GoAhead series server is different from that of most websites, rather than

Encodedecode () and decode () Encoding In python3, the default encoding method is changed to unicode   Prerequisites:   In Python3, str is unicode. bytes are used for binary, hexadecimal, and other formats.  Decode is to tell Unicode what