Python

Use XPath to search for text The text content extracted from the XML tree is XPath,>>> Print (html. XPath ("string ()") # lxml. etree only!Texttail>>> Print (html. XPath ("// text ()") # lxml. etree only!['Text', 'tail'] If it is frequently used,

OS. A three-element tupple (dirpath, dirnames, filenames) can be obtained through walk (). The first is the start path, and the second is the folder under the START path, the third is the file in the starting path. Dirpath is a string that

Pamie is called Python automation module for Internet Explorer. As its name suggests, pamie is a module that implements ie automation. The official website of pamie provides download of the latest modules. However, due to personal development,

Python cookbook Recipe 2.5. Counting Lines in a File, A new function enumerate was found today. In general, if you want to traverse both the index and element of a list or array, write as follows:For I in range (0, len (list )): Print I, list [I],

The more you see it, the more you like python. If you want to know the http and ftp download functions provided by python, it turns out to be so simple. 1. corresponding modules The ftplib module defines FTP classes and some methods for ftp

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Tag: Python queue threadI learned Python during my internship. I haven't been writing a 1000-line script for less than two months now, but the multithreading efficiency is too low. If this article is incorrect, please correct me. Here is an article:

Topic: I used Sina Weibo API to accumulate 14 thousand pieces of data in Weibo square. I chose 21 fields and output them as TXT files. I want to use Python to process them a little,Count the use of the expressions in the 14 thousand Weibo posts. The

Python supports built-in data types, including numbers, strings, lists, dictionaris, and tuples. Generally, data types are combined with operators. The size and accuracy of a data type, the declaration and initialization of variables, and priority

Environment: Python27 Library to be downloaded: Pygame processes Frames Http://www.lfd.uci.edu /~ Gohlke/pythonlibs/bpchanvi/pygame-1.9.2pre.win-amd64-py2.7.exe VideoCature Http://www.lfd.uci.edu /~

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->#! /Usr/bin/python # _ * _ Coding: UTF-8 _*_ List = ["apple", "banana", "grape", "orange"] Print list Print list [2] List. append ("sdf ") List. insert

As shown in the previous article, a global variable set COUNT is used to store all files in the current directory when searching for the underlying document. In fact, global variables are often involved in further application of python. Common

Document directory Introduction Use thread queue Use multiple queues Introduction For Python, there is no lack of concurrency options. Its standard library includes support for threads, processes, and asynchronous I/O. In many cases, Python

1. Check the titleCode Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Def test_navigate_page_without_click_link (self ): Sel = self. selenium Sel. open (self. BASE_URL) Sel. open (self.

To prevent the log from being too large, every hour will re-write the log file, and the files between is renamed to the server_errors.log.yyyy-dd-mm-nn, where nn is the serial number, from 00 to 23. Given the basic form of log, we need to analyze

Today, when I was studying Python Cookbook, I found a syntax from _ future _ import division, which is very strange. I searched the internet for the name of _ future, it turns out to be a very useful module. For more information, see here.

There is a platform module in Python to obtain information about the operating system.Import platformPlatform. machine () # Returns the machine type, e.g. 'i386' Platform. node () # Returns the computer's network name Platform. platform (aliased = 0,

There are two requirements: Delete all. svn files in a directory and subdirectory Delete all objects in a folder In Python, file operations mainly come from the OS module. The main method is as follows: OS. listdir (dirname): List directories

The fileinput module allows you to loop the content of one or more text files. We can use this function to analyze and process logs.   Import fileinput Import sysImport re Pattern = "\ d {4}-\ d {2}-\ d {2} \ d {2 }:\ d {2 }:\ d {2 }"FilePath =

The last character in a raw string can't be a backslash, If the last character (before the final quote) is a backslash, python won't know whether to end the string or not. the last character of the raw string cannot be \ If the last character is \,