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Python full stack development "basic three"
The content of this section:
Functions (global and local variables)
Recursive
Function
I. Definition and usefunction is most important to reduce the reusability of code and enhance the readability of code1 def function name (parameter): 2 3 ... 4
-like programming language [1], Big data developmentErlang = is a generic, concurrency-oriented programming language that is programmed by the Swedish telecommunications equipment manufacturer Ericsson, a functional typeThe Go ===go language is the second open source programming language released by Google 2009. The go language is optimized for programming multi-processor system applications, with go-compiled programs that are comparable to C or C + + code, and are more secure and support parall
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 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
)#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
([ 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
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 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
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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-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-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
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
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
) 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
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
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
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
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
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