Python

The decorator can add some extra functions before and after the target function execution without modifying the target function code.For example, there is a simple functionImport timeDef func1 (): Print ("This is a simple function") Time.sleep

Python uses the RE module to provide the ability to handle regular expressionsConstant常量 说明re.M、re.MULTILINE 多行模式 re.S、re.DOTALL 单行模式re.I、re.IGNORECASE 忽略大小写re.X、re.VERBOSE

1. PrefaceA python tuple (tuple) is similar to a list, except that tuples cannot be modified, that is, once a tuple is created, you cannot add new elements to a tuple, you cannot delete elements in an element, and you cannot modify elements in

Add Features1.在FTP(1.0.0)的基础上，支持了多并发的功能2.允许配置最大并发数，比如允许只有10个并发用户Program function:本程序模拟实现了一个FTP程序：1.程序分为客户端和服务端2.用户可以登录和注册账号，登录密码有MD5加密3.每个用户有自己的家目录

#-*-coding:utf-8-*-"""multi-threaded simultaneous Read Queue summary: 1. Blocks if self._jobq.qsize () > 0 into logic, at which time the data is taken out by other threads, and 2 is blocked in data = Self._jobq.get (). Need to learn to lock the use

Python's Shutil moduleShutil: Advanced file, folder, compression package processing moduleShutil.copyfileobj (FSRC, fdst[, length]) (Copyfileobj method only copies file contents)Copy the contents of a file to another fileImport

Data types for Python: Number (int, float, bool, complex) String List Tuple Set Dictionary To view the data types type ():In Python3, the integer type is only int, there is no long integer type, and we can see the

Tag: Address name cannot be maximum basename back module Erer applicationOne, isinstance (obj, CLS)Checks if obj is an object of class CLSClass Foo (object): Pass obj = foo () isinstance (obj, foo)Second, Issubclass (sub, super)Check if the sub

#max, Min,zippeople1={ 'Age1': 123,'Age2': 56,'Age3': 554,'Age4': 67,'Age5': 234,'Age6': 34,'Age7': 45} #取出key值可以知道对应值 with zipPrint(List (max (Zip (people1.values (), People1.keys () )))Print(list (Zip (People1.values (), People1.keys ())))

Title:There is a table file named Producesales.xlsx, each line represents a separate sales record, the first column (a) is the product name, the second line (B) is the product price, the third line (C) is the quantity of the sale, and the fourth

Title Description Everyone knows the Fibonacci sequence, and now asks for an integer n, please output the nth item of the Fibonacci sequence (starting with 0, and the No. 0 item is 0).nRecursive implementations:Class solution (): def Fibnacci

Python string built-in functionsPython's string commonly built-in functions are as follows: Serial Number Method and Description 1 Capitalize ()Converts the first character of a string to uppercase

What is a threadIn a traditional operating system, each process has an address space, and there is a control thread by defaultThread as the name implies, is a pipeline work process, a pipeline must belong to a workshop, a workshop work process is a

Python Crawler Tutorial -09-error moduleToday's protagonist is the error, crawl, it is easy to appear wrong, so we have to do in the code, common mistakes in the place, about Urllib.errorUrlerror Reasons for Urlerror production: 1

A definition: something that can be loaded. The data in the list is unlimited, and the size is basically sufficient for the list to use [] to represent. separated by commas (indexed and sliced) between each element and element in the listIndex: Each

Django1 vs. 2 routing differencesIn Django1The URL inIn Django2In the Re_pathdjango2The path is added to the1.From Django.urlsImport path2.Regular, exact match is not supported3.Yes5a converter (intStr, Slug, PathUuid）4.Custom Converters:1Write a

This article introduces you to the Python crawler Lxml-etree and XPath use (attached case), the content is very detailed, I hope to help everyone. Lxml:python's Html/xml Parser Official documents: https://lxml.de/ Before use, need to install an lxml

This article brings the content is about the Python function parameter detailed introduction (with the example), has certain reference value, has the need friend to consult, hoped to be helpful to you. Python's function definition is relatively

#-*-Coding: UTF-8 -*-#---------------------------------------# Program : Baidu Post crawler # version: 0.1 # Author: Why # Date: 2013-05-14 # language: Python 2.7 # operation: Enter the address with pagination and remove the last number, set the

Recently I am busy working on unity3d. I have put a lot of Python study notes, but now I am going to make it up. Speaking of basic concepts, programmers should be familiar with programming, but as part of the Notes, let's take a look at