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Python Full Stack Development directory

Python Full Stack Development directory Linux commands First knowledge of Python Python Basic data type function programming, set, depth copy Built-in functions File operations Decorative Device Iterators and generators Common modules Classes and objects of primary knowledge Classes and Objects (advanced) Reflection Except

Python full stack development-day7 file processing

python full stack development-day7 file processingOne, the file operationFirst, IntroductionComputer systems are divided into:computer hardware, operating systems, applicationsThree parts. Applications that we write in Python or other languages need to be saved on the hard drive if we want to keep the data permanently, which involves the application operating har

Python Full stack development: List of Python lists

)#results: [' A ', 2, ' C ', ' A ', 2, ' C ', ' A ', 2, ' C ']In similar to string in use#In #判断元素是否存在列表中ls = ['a','b','C','D']Print('C' inchls#TruePrint('x' inchls#FalseComparison of lists ( prerequisites: Must be of the same type to be compared, otherwise error )#Major premise: only the same type directly compare the size, for the index value of the direct comparison is based on the location one by one corresponding to the comparisonLS1 = ['a','b','C']LS2= ['x','y','Z']LS3= ['A','Z']Print(LS1

Python full stack development 11, processes and threads

([ gevent.spawn (F, ' https:// www.python.org/'), gevent.spawn (F, ' https://www.yahoo.com/'), gevent.spawn (F, ' https://github.com/'),])The above example, using the co-process, a thread to complete all the requests, when the request is made, will not wait for a reply, but once all the requests are issued, receive a reply to deal with a reply, so that a thread to solve all the things, the efficiency is very high.Ten, summaryThis blog post is the Pyton basic knowledge of th

Self-learning Python full stack development first notes

I have been following the video self-study for several days Python full stack development, today decided to listen to the teacher, began to write a blog, heard that the great God has come back to write a blog to record their growth. I particularly seriously follow this video to learn, (they start before the guarantee, I also wrote a copy, hahaha ...) I am now a q

Python Full Stack development-day2 Boolean, Process Control, loop

python full Stack development-day2 Boolean Process Control loopA, Boolean1. Overview#布尔值, a true one false #计算机俗称电脑, that is, when we write a program to let the computer running, it should be to let the computers infinitely close to the human brain, or what the human brain can do, the computer should be able to do,The main function of the human brain is data oper

Back-end initialization--go (full stack) development of enterprise-level backend management system

, Revel automatically compiles code and templates, and if the code compiles incorrectly, it gives an error and captures the run-time error. Full stack Features: Revel support: Routing, parameter resolution, validation, Session/flash, templates, caching, scheduled tasks, testing, internationalization and other functions. High performance: Revel is built on Go HTTP server. This is the latest evaluation

Full-stack python development-Day8 function basics, python-day8

Full-stack python development-Day8 function basics, python-day8Full-stack python development-Day8 function basics I. Introduction 1. Why do we need to use functions instead of functions? #1. The code's organizational structure is not clear and its readability is poor #2. Whe

Python full stack development-Day2 Boolean, process control, loop, python-day2

Python full stack development-Day2 Boolean, process control, loop, python-day2Full-stack python development-Day2 Boolean Process Control LoopI. Boolean 1. Overview # Boolean value, a value of True and a value of False # A computer is commonly known as a computer. That is, wh

Full-stack python development-Day5 tuples, dictionaries, python-day5

Full-stack python development-Day5 tuples, dictionaries, python-day5Full-stack python development-Day5 tuples and dictionariesI. PrefaceFirst of all, no matter what data type we learn, we will start learning with the following questions:#1: basic usage 1. Purpose 2. Definiti

Python Full stack Development Foundation "18th" network programming (socket)

Qq_name _dic:continue while true:msg = input (' Please input message, enter send: '). Strip () If msg== ' quit ': Break if not MSG or n OT qq_name or Qq_name not in Qq_name_dic:continue udp_client.sendto (Msg.encode (' Utf-8 '), Qq_name_dic[qq_name]) BACK_MSG,ADDR = Udp_client.recvfrom (1024) Print (' A message from [%s:%s]: \033[41m%s\033[0m '% (Addr[0],addr[1],back_msg.decode (' Utf-8 ')) Udp_client.close () Run resultsV. subprocess Sub-process moduleThe import Subprocess#popen m

Python3 full stack development-complementary UDP socket, operating system, concurrency theory base

into multiple virtual CPUs (multi-channel technology: Time multiplexing and spatial multiplexing + hardware support isolation), without process abstraction, modern computers will no longer exist.# the role of an operating system: 1: Hide ugly Complex hardware interface, provide good abstraction interface 2: Management, scheduling process, and the competition of more than one process to the hardware order # two multi-channel technology: 1. Background: For the single core, to achieve con

Python full stack development from getting started to abandoning the network foundation

length is 1500 bytes, and now the IP packet length is 5000 bytes. Therefore, IP packets must be split into four packets. Because each package has its own IP header (20 bytes), the length of the IP packets for the four packets is 1500, 1500, 1500, 560, respectively.8 Server-side responseAfter the forwarding of multiple gateways, Google's server 172.194.72.105, received the four Ethernet packets.According to the IP header number, Google put four packages together, take out the

Python Full Stack development * Threads Queue Thread Pool association * 180731

) Print("Finished eating") defPlay ():Print("Play") Gevent.sleep (2) Print("playing beauty.") G1=Gevent.spawn (Eat) G2=Gevent.spawn (play) G1.join ()#waiting for G1 to endG2.join ()#waiting for G2 to endSecond EditionTo use gevent, you need to place the from Gevent import Monkey;monkey.patch_all () to the beginning of the file fromGeventImportMonkey;monkey.patch_all ()Import TimeImportgeventdefEat (name):Print("Eat") Time.sleep (2) Print("%s finished eating"%name)defPlay

Python Full Stack Development Basics "25th" deadlock, recursion lock, Semaphore, event event, thread queue

threading Import Threadimport timedef Work (): res = 0 for i in range (10000000): res+=iif __name__ = = ' __main__ ': l = [] Start = Time.time () for I in range (4): P = Process (target=work) #1.9371106624603271 #可以利用多核 (i.e. multiple CPUs) # p = Thread (target=work) #3.0401737689971924 l.append (P) p.start () for P in L:p.join () stop = Time.time () print ('%s '% (Stop-start)) # I/O intensive to turn on multithreading from multiprocessing import processfrom threading Import Threadimport ti

Python Full Stack development path

First, the Python Foundation About Python Python data type (numeric \ string \ list) Python data type (tuple \ Dictionary) Ii. python file Operations functions Three, Python common module Four, object-oriented development five, network programming--socket Development VI, concurrent Programming VII, MySQL database eight, the front-end development

Python Full stack development day01

interrupted by a break. Will execute the statements after else exercise 2-4 The idea is very clear, self-made out, stating that the basic knowledge has mastered the exercises 1 and exercises 5 ideas are not clear practice 1 card in7 to get away from this ring, I then forgot 7 or to participate in the cycle, and print out the 7. Exercise 5 cards on I self-increment. Keep in mind that the code runs from top to bottom exercise 6 refer to the teacher's ideas, made out of their own today's questio

Python Full stack development outline

Chapter One Python basicsChapter II Python BasicsChapter III Python Basics-file Operations FunctionsFourth Python basics-common modulesThe fifth chapter design and development of object-oriented programmingThe sixth chapter--socket development of network programmingSeventh Chapter concurrent ProgrammingEighth Chapter MYSQY DatabaseNineth Chapter Front-end developmentThe Tenth Chapter DjangoThe 11th Chapter

Python full stack development--network programming one

SideImportSocketsk= Socket.socket ()#Create a communication tool, such as buying a phone when you callSk.setsockopt (socket. Sol_socket,socket. so_reuseaddr,1)#to avoid a service restart, report the address already in useSk.bind (('192.168.13.35', 8080))#bind address to Socket, Sk.bind ((' IP ', ' Port ') IP address and portSk.listen ()#Monitoring LinksCONN,ADDR = Sk.accept ()#Accept Client Links whileTrue:ret= Conn.recv (1024x768). Decode ('Utf-8')#receive client information, accept 1024 bytes

Python full stack development * MySQL data type * 180829

. Delete a table#按道理来说, a department in the department table was deleted, and the associated records for the employee table were deleted successively.However, after you delete the records for the employee table, delete the current department without any problemsThe above Delete table record operation is more cumbersome, according to the truth, cut off a department, the staff of the department will be cut off. In fact, there is a very important element in the construction of the table,Call sync D

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