python xpath example

XML instance:Version One:XML version= "1.0" encoding= "UTF-8"?>Countryname= "Chain">Provinces>Heilongjiangname= "Citys">Haerbin/>Daqing/>Heilongjiang>Guangdongname= "Citys">Guangzhou/>Shenzhen/>Huhai/>Guangdong>Taiwanname= "Citys">Taibei/>Gaoxiong/>Taiwan>Xinjiangname= "Citys">WuLuMuQiWaith= "Tianqi">ClearWuLuMuQi>Xinjiang>Provinces>Country>No spaces, line breaks, versionExamples of Python operation operations: fromlxmlImportetreeclassR_xpath_xml (obj

Python decorator use example and actual application example, python example Test 1 Deco is running, but myfunc is not running Copy codeThe Code is as follows:Def deco (func ):Print 'before func'Return func Def myfunc ():Print 'myfunc () called'Myfunc = deco (myfunc) Test 2

Reference below: http://www.jb51.net/article/57183.htmIndividual is also a little tidy up, modify some of these errors, these errors related to Scrapy version selection, personal use of Python2.7 + scrapy1.1Another example of the URL (http://www.dmoz.org/Computers/Programming/Languages/Python/Books/) is often inaccessible, people notice, do not think that the script has a problem.Nonsense said, the followin

the document. Therefore, the first instantiated selector must be related to the root node or the entire directory. In Scrapy, there are four basic methods of selectors (click to view API documentation): XPath (): Returns a series of selectors, each of which represents the node selected by an XPath parameter expression CSS (): Returns a list of selectors, each select node that represents a CSS para

, selectors has four basic methods (click to view API documentation):XPath (): Returns a series of selectors, each of which represents an XPath parameter-expression-selected nodeCSS (): Returns a series of selectors, each of which represents a node selected by a CSS parameter expressionExtract (): Returns a Unicode string for the selected dataRe (): Returns a string of Unicode strings for content crawled us

Boost. python compilation and example, boost. python example Welcome to reprint, reprint please indicate the original address: http://blog.csdn.net/majianfei1023/article/details/46781581 Linux compiled boost link: http://blog.csdn.net/majianfei1023/article/details/46761029 Yesterday, we compiled and installed boost.

The example explains how to call and define functions in Python, and the example explains python Call the function: #! /Usr/bin/env python3 #-*-coding: UTF-8-*-# function call >>> abs (100) 100 >>> abs (-110) 110 >>> abs (12.34) 12.34 >>> abs (1, 2) Traceback (most recent call last): File " Define functions: #! /Usr/bi

In this textbook, we assume that you have installed the scrapy. If you are not installed, you can refer to this installation guide. We will use the Open Directory Project (DMOZ) As our example to crawl. This textbook will take you through the following areas: Create a new Scrapy project Define the item that you will extract Write a spider to crawl the site and extract items. Write an item pipeline to store the proposed items Scr

Python: Simple Method example for deleting the same element in the list, python example This example describes how to delete the same elements in the list in Python. We will share this with you for your reference. The details are

Details about the Python mail sending example and the python mail sending example Python needs two modules: smtplib and email. It is also because we can import these modules in our actual work that it makes processing tasks easier. Today, let's take a good look at sending em

Python combination mode and responsibility chain mode programming example, python example Combination ModeWe regard the Composite mode as a complex attribute structure. In fact, there are basically three roles: trunk (defining some operations for leaf) and branches (many branches on the trunk) and the leaf (the object

Python decorator usage example summary, python decorator usage example This document describes how to use the Python decorator. We will share this with you for your reference. The details are as follows: I. What is the decorator? The pyt