Python

Client side:# Import Time # Import Socket # SK = Socket.socket (socket.af_inet,socket. SOCK_STREAM) ## while True:# sk.connect ((' 127.0.0.1 ', 6667))# print ("Hello") # sk.sendall (bytes ("Hello", "UTF8")) # Time.sleep (2) # BreakServer

The suffix name can be anyImport module, not. Py is wrong, all. pyPython interpreter py file pathPython#！ /usr/bin/env Python//linuxWindow has no effectThe variable can only be underlined in alphanumeric characters and cannot begin with a

Conditional judgmentComputers can do a lot of automated tasks, because it can make their own conditions to judge.For example, enter the age of the user, print different content according to age, in the Python program, with the if statement

The existence of the Gil Lock makes it possible for Python to achieve multi-threaded parallelism through multicore, and if you want Python to take advantage of multicore, it can only be done by opening multiple processes. So Python is suitable for

1 eat=3+5+72 cloth=203 traffic=6+6+64 Spirit =300+400+3005 total=eat+cloth+ traffic+ Spirit 67print(' total consumption ', totals)Eat, cloth, traffic, spirit, total the role of the name, is to put the intermediate results of the program operation

Preparation: Installation python3.6.5Installing PycharmPycharm Settings Add Template description settings - editor - file and code templates - python script add template content1. Learn the ritual sense of programming: the first Python programPrint (

Function Summary" "1, what is a function function is a tool with a specific function 2, why use a function to reduce the expansion of repetitive Code enhancement program to enhance readability 3, how to use the function 1, function of the principle:

Set SetFeatures of the collection:1. Composition of different elementssuch as: s = {1,2,3,4,3,3,3,3,3}s = {1,2,3,4}2. Disorder3. The elements in the collection must be immutable typesMutable type: list, dictionaryImmutable types: Numbers, strings,

Problem Description:Readtimeouterror:httpsconnectionpool encountered in Python package download?Problem solving:Method 1: Continue to repeat the downloadPip Install VirtualenvMethod 2: Set the time-out periodPip--default-timeout=100 install-u

TCP Programming for 1.1socket programming"" "Socket type Sock_stream connection-oriented stream socket, default TCP protocol Sock_dgram no connected data message socket, UDP protocol" "" Import sockets = Socket.socket () s.bind (' 127.0.0.1 ', 9999)

What is a reptile? A crawler is a program that gets the content of a Web page parsed to get useful data and store data in a database.Basic steps:1. Get the contents of the Web page by constructing the request to the server side, let the server side

can refer to the Novice tutorial: http://www.runoob.com/python3/python3-smtp.htmlImport Smtplibimport email.mime.multipartimport email.mime.textmsg=email.mime.multipart.mimemultipart () msg[' from ' ]= ' [email protected] ' msg[' to ']= ' [email

Copyright NOTICE: This article for Bo Master study record, reprint please indicate source () Urlparse ()#Urllib.parse.urlparse (urlstring,scheme= ", allow_fragments=true)#URLString: This is a required entry, that is, the URL to parseresult =

Numeric type (number)There are four types of numbers in Python: Integer, Boolean, floating-point, plural.1 int 1 int , expressed as a long integer, with no python2 in it. 2bool (Boolean), as True. 3float1.23, 3e-2411.12 .2jStrings (String)

A definitionExceptions fall into two categories: one is auto-triggering exceptions such as 0 errors, and the other is triggered by raise.Second why use exceptions　　When the program runs, Python throws an exception if a program error is detected, and

Background, many of the company's services, including database access need to be accessed through a springboard machine, for the daily work and the use of trouble, the special number of Python directly manipulate the data is more troublesome, so

The first time to write a study summary blog, but also a little excited about it, (#^.^#)1. History of the computer operating system: Unix LUnix Mac Windows Pending additions2. Programming languages C Language:

ID (variable): Returns a memory addressK1 is K2: Determine if their memory address is consistentK1 = = K2: Determine if their values are consistentSmall Data pools:-5-256STR: the same stringSTR * INT: Their length is not more than 20, the memory is

Use of 1.timeimport

Brief introductionThe program does not run alone, and the program is assigned resources to run only if it is loaded into memory, and this execution is called a process. The difference between a program and a process is that a program is a set of