Python

Detailed steps for upgrading the Python version of centos   @ For & ever 2010-07-06   The default Python version of centos is 2.4.Now you need to upgrade python to version 2.5 or above (the same method for upgrading Python 2.6 ).Because yum

'''Created on May 20,201 3 @ Author: yang ''' # Build the dictb ={}# intialize the dictb [1] = 2B [2] = 23B [4] = 25 # B. keys () B. values () B. items () B. copy () B. get (1) B. get (3, 2) B. has_key (5) if 1 in B: Print 'yes' else: Print 'no' if 1

When I first learned about Python, I saw that it supported the Python language when reading Sina's Sae, including Sina's opening of the Python language in the last week, later, when looking at various major cloud computing platforms, there were

Import Re def getfrompatten2 (Patten, Src): P = Re. compile (Patten, re. s) All = P. findall (SRC) rst ={} for matcher in all: rst [matcher [0] = matcher [1] return rst def readconfig (): F = open('config.txt ', 'R') content = f. read ()

Recently, Python has been used for packaging because it needs to be released. However, it is found that the package of python2.6 is not powerful and cannot be run on a machine without Python or vs2008 installed, it is estimated that the DLL is

Def computefreq (wordlist, text): Result = [] for word in wordlist: countword = text. count (Word) texted = nltk. word_tokenize (text) Length = Len (texted) freq = countword/length temp = {} temp ['word'] = word temp ['freq'] = freq # print freq

  Simple Test of pexpect-Python implementation of objective CT   @ For & ever 2010-07-03   Pexpect is an automatically controlled Python module that can be used for SSH, FTP, passwd, telnet, and other command lines for automatic

Usage of struct. Unpack in Python 4/25/2009 12:18:21 In python, the sub-string in a string is extracted in a certain format. It is very efficient to use struck. Unpack.1. Set the fomat format as follows: # Take the first five characters,

Event is mainly used in thread communication. A thread does not get the desired resource and is blocked by event. Wait. When another thread gives corresponding resources, it notifies all threads with event (with the same event) Other threads can run

A function that contains the keyword "yield" is not a common function. When a function containing this keyword is called, the function stops running when it encounters yield and returns an iterator ). Each time you request a value, the generated

Reprinted: http://ipython.iteye.com/blog/1136931 In python, pymmseg-CPP is very convenient!   Environment ubuntu10.04, python2.65   Steps: 1 download mmseg-CPP source code http://code.google.com/p/pymmseg-cpp/ 2 tar-zxf pymmseg-CPP * .tar.gz //

Reprinted: http://www.crifan.com/python_string_with_leading_char_r_u/ (1) A string in Python that starts with R or R represents (unescaped) the original string The character in Python. If there is an R at the beginning, for example: (R' ^

  Testing is required at work. python is used for development. The syntax is simple, and the robotframework can be used in combination. In general, qtp testing is less used for development, and qtp testing is also relatively slow. Therefore, you can

Data Matching   First, study the most critical data capture. The content is extracted from different forms of data. Of course we have to rely on our powerful tool for regular expressions (I think dom-based tree analysis is very troublesome and

Document directory Python coding specifications Python coding standard indent Use four spaces as the first indent.Tab or space Do not mix tabs and spaces.Maximum row length The maximum length of a row is limited to 80 characters.Blank

Recently, I am interested in Python. I have basically read the simple Python Tutorials that are widely circulated on the Internet, and I have tried it myself. I feel that python is indeed an elegant language. I saw a python Binary Tree Code on the

The selenium tool supports multiple browsers. There are many online materials. After comparison, I chose the splinter module, because the use of splinter to develop browser automation operations, code writing is relatively simple.1. Install

I recently encountered this problem when I played beautifulsoup and wanted to crawl some of my favorite data. Beautifulsoup converts & nbsp; To '\ xa0' by default, and GBK cannot output the result. This cannot be converted to GBK, but the default

1. Identify the following strings: "Bat," "bit," "but," "hat," "hit," or "hut" Import Re DATA = r'but, ' patt =' B. T ,? ' M = Re. Search (patt, data) If M is not none: Print M. Group ()    2. match any pair of words separated by a space, such as

Using Python + opencv to write a simple tagging systemMark the target with the mouse to record the upper left corner and lower right corner of the targetThen there is a direction key to jump to the next frame.It can be used for simple tagging.The