Python

We all know that there are currently four concurrent (not parallel) programming methods: multi-process, multi-thread, asynchronous, and collaborative. Multi-process programming has a C-like OS in python. fork, of course, also has a higher-level

Capture exceptionsServer programs generally need to keep working when an internal error occurs. If you do not want the default abnormal behavior, you need to wrap the call in the try statement to capture exceptions on your own. Use the try/retry t

6.4.5 reversal process We have already discussed how to collect parameters as tuples and dictionaries. But in fact, if you use * and *, you can perform the opposite operation. >>> def add(x,y): return x+y>>> params=(1,2)>>> add(*params)3 You can

Lambda expressions in Python are very simple, Lam = lambda a: a * 2 --> lam (3) 6 It is quite useful in some cases. But it is not powerful enough to compare C # To lambda expressions (I am not in the dark python, let alone ).   The lambda

I was planning to develop a fun project last month, but I have never had time. This is part of the project, This part is basically poor in communication. First, simulate the mouse and keyboard press the release action, I use X11 This library, so you

I. Related codeDatabase Configuration class MysqlDBConn. py Copy codeThe Code is as follows:# Encoding = UTF-8'''Created on 2012-11-12Mysql Conn connection class'''Import MySQLdbClass DBConn:Conn = None# Establish a connection to the Database

1. The website address http://www.baicmotor.com/dealer.php 2. After using firefox to view the information, I found that the website does not use json data, but is simply an html page. 3. Use pyquery in the PyQuery library for html Parsing Page Style:

The content in this part will be a demonstration of the positioning Element Method in WebDriver, which is a combination of methods used in the WebDriver of Selenium element locating command. For a review of element locating methods in Selenium,

The following uses webdriver to handle dialog box events that appear on the page.   The pop-up dialog box on the page is a common problem in automated testing. The front-end framework dialog box is often in the form of div. Below are some common

  You don't need to talk about what python is. Python Server Pages (PSP) is for Python, just as Java Server Pages is for Java. Compared with pages processed by conventional CGI, the page displayed by PSP is 50 times better. Mod_python contains many

3.1 basic string operations All standard sequence operations (index, sharding, multiplication, determining membership...) are also applicable to strings. However, please remember the wordsCharacter strings cannot be changed. 3.2 string formatting:

6.1 laziness is a virtue Currently, the programs we write are very small. If you want to write a large program, you need to reuse the code. This problem can be solved by creating a function. 6.2 abstraction and Structure Abstraction can save a lot

0. Preface The most important homework for learning a language is practice and review. Although I didn't teach you anything in section 37th of the stupid methodology Python, it reminds us: "I 've learned so much, how much do you remember? I have

Reprinted please indicate the source: http://blog.csdn.net/jmppok/article/details/17588381 In windows, you can use putty to connect to a linux host through ssh. However, putty has some problems, such as not saving the session and garbled characters.

In python, the pickle class can be used to serialize python objects. cPickle provides a simpler and faster interface, as mentioned in the python document: "cPickle-A faster pickle ". CPickle can serialize any type of python object, such as list,

I was planning to develop a fun project last month, but I have never had time. This is a part of this project, and it is easy to handle this part, such as poor communication. First, simulate the mouse and keyboard press the release action. I use the

Directly run the Code: Copy codeThe Code is as follows:#! /Usr/bin/python#-*-Coding: UTF-8 -*- Import urllib Import OS, datetime, string Import sys From bs4 import BeautifulSoup Reload (sys) Sys. setdefaultencoding ('utf-8 ') _ BASEURL _ = 'HTTP: //

Suppose we want to add our own Middleware to record the logs of each request.The following is a standard Middleware. The constructor accepts a wsgi app and _ call _ returns a wsgi app. Copy codeThe Code is as follows:Class LoggerMiddleware (object ):

1. iteratorThe simplest example of the stack generator should be the array subscript. See the following c ++ code: Copy codeThe Code is as follows:Int array [10];For (int I = 0; I Printf ("% d", array [I]); The stacked generator works in a container

Copy codeThe Code is as follows:#-*-Coding: UTF-8 -*-'''Created on 2013-12-5 @ Author: good-temper''' Import urllib2Import bs4Import time Def getPage (urlStr ):'''Get Page Content'''Content = urllib2.urlopen (urlStr). read ()Return content Def