Python

Determining string encodingThe use of Chardet can be very convenient to implement string/file encoding detection. Especially the Chinese page, some pages use gbk/gb2312, some use UTF8, if you need to crawl some pages, know that the page encoding is

In interactive mode, the recommended use of Ipython, design is very user-friendly, automatic completion of the function is my favorite.Installation: Apt-get Install IpythonEditor I'm using Vim.Python identifier:Identifiers include numbers,

First, the basis of the module 1. Module Self-contained, organized code snippets are modules A module is the Pyhon highest-level program organizational unit that encapsulates program code and data for reuse. In practical terms, modules

Before starting the optimization, write an advanced test to prove that the original code is slow. You may need to use some minimum data sets to reproduce it slowly enough. Usually one or two programs that show runtime seconds are enough to handle

[Email protected] ~]# cat/home/python/term_console.py#!/usr/bin/env pythonImport OS Ip_file = ' Ip.txt 'Log_file = "/home/python/a.txt"Ip_dic = {}num = 0f = File (Ip_file)While True:num + = 1line = F.readline ()If Len (line) = = 0:breakIp_dic[num] =

In this section, we will learn about Python's control flow statements, mainly including if, for, while, break, continue, and pass statements 1. If statement The IF statement is perhaps the most familiar statement we have.

From today onwards, I will open the Python learning model and use the blog to record the learning process and related knowledge points 1.Python Download Installation You can download various versions of Python in the official website:

Personally prefer the Linux system, in the Linux system and more like Ubuntu, so here only to introduce the environment of Ubuntu set up (normally Linux system installed by default Python)Ubuntu:1. Source Code Installation:To

Tree traversal implemented using Python, including width first and depth firstEF dfs (): Tree= { 'A': ['B','C'], 'B': ['D','E'], 'C': ['F','G'], 'D': ['H','I'], 'E': [], 'F': [], 'G': [], 'H': [

Set python automatic tab auto-completion in Linux and linuxpythontab 1. Install the readline module. Sudo apt-get install readline * 2. Create a file ~ /. Pythonstartup. The content is as follows: # Python startup fileimport sysimport

Compile a simple crawler for Baidu Post Bar in Python, and compile a crawler in python Operation: enter a paging address, remove the last number, and set the start and end pages. Function: Download all pages of the corresponding page number and

Python obtains the ip addresses, masks, and broadcast addresses of all NICs on the local machine.After searching for a day, I did not find a proper piece of code to obtain the ip addresses, masks, and broadcast addresses of all network adapters on

Python uses regular expression matching for image capturing code sharing and python for image capturing Connotation: Regular Expression matching, regular expression replacement, page capturing, and image saving. Practical first Python code

For Python exception handling, we recommend that you use "handler T: pass" with caution. For python exception handling Translated from StackOverflow, a question and answer about Python exception handling. Q: Why is "fail T: pass" a bad programming

A simple example of using the map function to complete Python parallel tasks, mappython As we all know, Python's parallel processing capability is not ideal. I think that if we do not consider the standard parameters of threads and GIL (most of them

Getting started with programming in Python design mode and getting started with python Have you ever wondered what the design pattern is? This article shows why the design mode is so important. It uses several Python examples to demonstrate why the

Use _ slots _ in Python to cache resources to save memory overhead _ We once mentioned how the Python web server of Oyster.com uses a huge Python dicts (hash table) to cache a large amount of static resources. Recently, in the Image class, we used

Python script for Linux Server monitoring tutorial, pythonlinux Currently, some Linux system monitoring tools, such as inotify-sync (File System security monitoring software) and glances (resource monitoring tool), are written in Python, the Linux

Python Getting Started Guide and python Getting Started Guide under simple programming 0 Have you ever wondered how computers work? Although we cannot teach you everything in an article, we can get a good start by learning how to write your own

Use Python to compile and analyze Python Program Performance Tools. Although not every Python program you write requires a strict performance analysis, it is reassuring that when a problem occurs, the Python ecosystem has various tools to deal with