Python

Python Implementation of queue After an abstract data type is created, a class can be created to implement the queue. As before, we used the python built-in list as a tool to create a queue class. The queue is also ordered, so it is necessary to

Once in a while someone comes up with a Perl is .... post, and there are always people who point out why their measurement is flawed and how everything is perfect. yet there are people with mid-career crisis and then others who tell me this was a

The question is from the Challenge 'didactic text' [Crypto] of hacker.org. Analyze the given articles to find out the hidden words.   Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and

Specify a folder, specify the file type, and replace the content of all files in the folder. Note that encoding must be specified for read and write content in the window, and # coding: UTF-8 encoding must be specified in the file header to avoid

How does one operate Redis using Python? The following example describes how to read and write Redis databases using Python.For example, we insert a data record as follows:Copy codeThe Code is as follows: import redisClass Database:Def _ init _

From this section, delete the original English version and send the translated documents directly. Suffix expression evaluate The most application example of the stack is to calculate the value of a suffix expression. In this example, the stack

First, let's take a look at how to obtain webpage content for normal human behavior.(1) Open a browser, enter a URL, and open source web page(2) select the desired content, including the title, author, abstract, and body.(3) store it to the hard

Python example: Save the webpage to a Local MachineCopy codeThe Code is as follows:# Coding = UTF-8_ Auther _ = 'xianbao'Import urllibImport OSDef reporthook (blocks_read, block_size, total_size ):If not blocks_read:Print 'open connection'ReturnIf

Simple implementation of point K mean Analysis in the plane, using Euclidean distance, and using pylab. Copy codeThe Code is as follows:Import pylab as pl # Calc Euclid squireDef calc_e_squire (a, B ):Return (a [0]-B [0]) ** 2 + (a [1]-B [1]) ** 2 #

Directly, this is all the software I used to configure the windows7python and django development environments on my computer. The requirement is not high. Only the versions of these software must be consistent, It should be noted that the software

#-*-Coding: UTF-8-*-import timeimport functoolsdef foo (say, hi = 'xx'): print locals () print 'in foo: say % s' % (say,) def add (x, y): return x + y # version 1def timeit (func): start = time. clock () func () end = time. clock () print 'used: ',

The token can be saved for 2 hours and has a limit on the number of calls. Therefore, it must be cached and saved. First open the cache memcache of sae, 1 MB. Create tokenabc. py Import urllib2import jsonimport pylibmc as memcachemc = memcache.

I. Basic Application Seriously writing a blog is really a matter of physical strength and mental power. For the Python veteran, I also learned how to find it while learning it. Therefore, mistakes and omissions are inevitable. please correct me, the

You can use this game to learn how to use tkinter in ython3.3.Copy codeThe Code is as follows:#-*-Coding: UTF-8 -*-Import tkinter as tkImport sysImport randomImport re Number = random. randint (0,1024)Running = TrueNum = 0Nmaxn= 1024Nminn = 0 Def

Python provides two modules to support multi-threaded programming: thread and threading. Thread module functions Function Description Start_new_thread (function, args, kwargs = None) Generate a new thread and use the

Copy codeThe Code is as follows:# Coding = UTF-8_ Auther _ = 'xianbao'Import sqlite3# Open a databaseDef opendata ():Conn = sqlite3.connect ("mydb. db ")Cur = conn.exe cute ("" create table if not exists tianjia (Id integer primary key autoincrement,

1. See the figure for usage and execution results:Ii. python implementation code:Copy codeThe Code is as follows: [root @ yang python] # vi check_ip.py#! /Usr/bin/pythonImport OS, sysDef check_ip (ipaddr ):Import sysAddr = ipaddr. strip (). split ('.

I. program testingCopy codeThe Code is as follows: # python check_change.py Usage: python check_change.py update/home/wwwrootPython check_change.py check/home/wwwroot # Python check_change.py update/data/www # generate the site's md5 Value# Echo ''>/

1. What is an exception?An exception is an event that occurs during program execution and affects normal execution of the program.Generally, an exception occurs when Python cannot process the program normally.An exception is a Python object,

1. What is the _ init _ method?If you have written object-oriented code using Python, you may be familiar with the _ init _ method, and the _ init _ method is usually used to initialize a class instance. For example:Copy codeThe Code is as follows:#-