Python

# -*- coding:utf-8 -*-#strip正则表达式#if 只字符串，不带参数，去首尾空白#else 去除参数text=input("Input a text:")import redef st(text): #原样返回检测 textReg=re.compile(r"^\w+$") #前后或前或后，空白检测 blankReg=re.compile(r‘^\s+(\w+)\s+$|^\s+(\w+)|(\w+)\s+$‘)

A comparison of programming languagesShell (LINUX), PHP (mostly Web page), Java and Python (common language)Two ways to learn Python1. Learn Grammar First2. Then learn the module (most of the modules are written well, we just need to call it)Output

list, consisting of a series of elements arranged in a particular order. You can create a list of all the letters, numbers, 0~9, or names of all family members in the alphabet, or you can add anything to the list, where there is no relationship

1, daemon threadImport Time fromThreadingImportThreaddeffunc ():Print('start executing a child thread') Time.sleep (3) Print('Child thread Execution complete') T= Thread (target=func) T.setdaemon (True)#The Process settings daemon is a property

function definitionThe function code block begins with a def keyword followed by the function identifier name and parentheses ().Any incoming parameters and arguments must be placed in the middle of the parentheses. Parentheses can be used to define

Module collections-collections.namedtuple means that the tuple is not clearIf it represents a coordinate, T = (up), it is unclear.If that's the case, point (X=1, y=2)from collections import namedtuplePoint = namedtuple('Point', ['x', 'y'])

练习1、模拟抢车票（进程同步 锁） 代码1：（并发运行,效率高,但竞争同一文件,数据写入错乱） from multiprocessing import Process import time,json,random def search(): dic=json.load(open(‘db.txt‘)) print(‘剩余票数%s‘ %dic[‘count‘]) def get(): dic=json.load(open(‘db.txt‘)) time.sleep(0.1)

1. The dictionary provides a mapping between Key-value and supports the following basic operations:x = d[k] Indexed by keyD[K] = x is assigned by keyDel D[k] Deletes an item by keyK in D checks if a key existsLen (d) Number of items in the

Functional programming is a very high degree of abstraction of the programming paradigm, the purely functional programming language functions are not variable, so any function, as long as the input is determined, the output is OK,This pure function

Multiprocessing of Python multi-process programming1,process Cross-platform process creation module (multiprocessing) for cross-platform support: Windowx/linux Create and startCreate format: p=process (target= function name)----def __init__

programming language Advanced bytecode low-level machine code Python language Javapython CPython commonly used pypy fastest Python program:1Terminal: C:\python36\python.exe \ c1. PY Interpreter:2File Type#/usr/bin/u/ubv/a python Linuxpython1. py./1.

What is splash:Splash is a JavaScript rendering service. It is a lightweight browser that implements the HTTP API, and Splash is implemented in Python, using both twisted and QT. Twisted (QT) is used to enable the service to have asynchronous

List Learning----------list:append tail insertion----------name_list = ["alex","tony","eirc"]name_list.append(‘seven‘)name_list.append(‘moon‘)print(name_list)----------List:insert Insert----------by positionname_list =

100 RESTful API, 100 restfulapi Navigate to this article: RESTful RESTful API design Django-based implementation Implementation Based on Django Rest Framework   1. RESTful REST is independent of technology and represents a software

Sesame HTTP: Installation of pyspider and sesame httppyspider Pyspider is a powerful web crawler framework compiled by binux, which has powerful WebUI, Script Editor, task monitor, Project Manager, and result processor. It also supports multiple

Sesame HTTP: Analysis of the Robots protocol and sesame Analysis of the robots Protocol Use urllib'srobotparserModule. We can analyze the Robots protocol of the website. In this section, we will briefly understand the usage of this module.1. Robots

11. Network Programming: socket, server, client, and network programming socketSocket: Socket, also known as "socket", usually sends a request to or responds to a network request through "socket. Use socket in python for network connection

Python: Advanced thread and advanced python thread 1. daemon thread Import timefrom threading import Threaddef func (): print ('start executing subthreads') time. sleep (3) print ('subthread execution completed ') t = Thread (target = func) t.

Make Python output more beautiful and Python output more beautiful Print by default, the output is a line feed. If you want to implement a line feed, you need to add a line feed at the end of the variable.End = "":   Student_age = 18 Print

Regular Expression module re: Regular Expression common characters, common optional symbols, group and groups, match, search, sub, findall, compile, and findallcompileRe: Introduction: Regular Expression Module Regular Expression characters: