Python

Represents a private property and can only be accessed within its own instance method. Self.__name will be compiled into self._bar__name to achieve "no external access" effectExamples are as follows:Variable: 1.  Variable with _: Indicates that it

This list contains Python libraries for crawling and data processing with Web pagesInternet General Urllib-Network library (STDLIB). Requests-Network library. Grab-network library (based on Pycurl).

NNumPysystem isPythonAn open-source digital extension. Such a tool can be used to store and process large matrices,Pythona nested list of its own (nested list structure)structures are much more efficient (the structure can also be used to represent

If branch statement>>> count=89>>> if count==89:Print Count#单分支>>>#coding: Utf-8Count=int (raw_input (' Please enter a number '))Print CountIf count>80:print ' bigger than 80 'ElseIf countprint ' smaller than 80 ' #多分支======= Custom Function while

Learn the collections of Python every day.The Collections module provides several additional data types based on the built-in data types (dict, list, set, tuple): Chainmap, Counter, deque, Defaultdict, Namedtuple and Ordereddict and so

python parsing of XMLThe common XML programming interface has DOM and sax, and the two interfaces handle XML files in different ways, of course, using different scenarios.Python has three ways to parse Xml:sax,dom, and ElementTree:1.SAX (Simple API

Sometimes it is necessary to use a script to send mail automatically, and Python to send the message is very convenient, the code is as follows:#!/usr/bin/python#coding:utf-8import smtplib  from email.mime.text import  mimetext  #  introduction of

The importance of unit testing is not much to say, hateful is that there are too many unit testing frameworks and tools in Python, what unittest, TestTools, subunit, coverages, testrepository, Nose, MOX, mock, Fixtures, Discover, plus setuptools,

Example 1:V1=u ' good magic question!? 'Type (v1)-"UnicodeV1.decode ("Utf-8") # Work,because V1 is Unicode alreadyV1.encode ("gb2312") #work, convert from Unicode to gbk2312FoundDecode is the conversion of the specified object to Unicode (Unicode

Python file operationsNormal file operations are divided into three steps:Open FileManipulating filesClose FileSyntax: File handle = open (file name, mode)R, read-only mode (default).W, write-only mode. "unreadable; not exist; create; delete content;

Why is Python running so slowly ?, Python running When you ask why Python is slower than the C language on the Internet, the most common answer is that Python has dynamic types. However, dynamic types do have performance impact, but this is not the

Simple notes for Python string features and common string methods, python strings Both single quotation marks and double quotation marks can represent strings. The difference lies in escape. If you are too lazy to add escape characters, you can add

Use Python to handle 12306 abnormal verification codes, python12306 When the Spring Festival is approaching, the Helper's house editor leads everyone to grab train tickets with Python! First, we need splinter. Installation: Pip install splinter-I

Python Regular Expression checks the validity of the password and the validity of the python password. The customer's system upgrade requires that the user's password comply with certain rules, that is, including uppercase and lowercase letters,

Python sample code for merging text files, Python merge text file sample code. Python combines two textsEmployee ID and name are recorded in the employee fileCat employee.txt: 100 Jason Smith200 John Doe300 Sanjay Gupta400 Ashok Sharma Bonus

On Linux, Nginx + Python's web. py and Django framework environment, 1. Compile nginxI bought a copy of "Practical nginx-replacing Apache high-performance server" on the Internet, which is relatively simple to write. It mainly involves configuration,

My Pycharm, my master It took more than a week to translate the official help documentation of Pycharm. There were 43 blogs in total, so I felt a lot tired. Before complaining, let's make a summary of what we are doing. Here we will list all the

Object-oriented python: object-oriented python I. Classes and objects 1. What is a class?Class.Object refers to an instance of a specific abstract class. Does the above statement seem a bit cloudified. Yes, professional explanations are hard to

Python creates a thread to implement the ticketing system, and python object-oriented --- Restore content start --- PassObject-orientedThe core of Multithreading is inheritance.Threading. ThreadClass. We have defined a class.BoothThread, This

The most complete Pycharm tutorial (30) -- File Watchers in Pyhcarm 1. Subject The usage of file watcher in PyCharm is described in detail. 2. Preparations (1) The Pycharm version is 3.1 or later. (2) The File Watchers plug-in is available. This