Python

first, what is the __init__ method? Students who have written object-oriented code in Python may be familiar with the __init__ method, and the __init__ method is often used to initialize a class instance. For example: The code is as

1 Copy the following code to a file named asyncore.py The code is as follows: Import socketImport SelectImport Sys def ds_asyncore (addr,callback,timeout=5):S=socket.socket (Socket.af_inet,socket. SOCK_STREAM)S.connect (addr)R,w,e =

Use this mini-game to learn how Tkinter is used in ython3.3 The 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 ebtnclose

The code is as follows: #-*-coding:utf-8-*-'''Created on January 10, 2014 @author: Hhdys'''Import Urllib.request,http.cookiejar,reClass Baidu:def login (self):CJ = Http.cookiejar.CookieJar ()Opener = Urllib.request.build_opener

Method One: The code is as follows: f = open ("Foo.txt") # Returns a File objectline = F.readline () # Call the ReadLine () method of the fileWhile line:Print line, # followed by ', ' will ignore newline characters# print (line, end = ") # used

Input parameters such as: www.bitsCN.com/to delete www.bitsCN.com first page cache, www.bitsCN.com/test.php means to delete/test.php cache The code is as follows: #coding =utf8Import Sys,osImport HashlibIf Len (SYS.ARGV) Print ("You did not

Template Basic IntroductionA template is a text that separates the representation and content of a document. The template defines the placeholder and various basic logic (template tags) that are used to standardize how the document should be

The code is as follows: #!/usr/bin/env python#-*-Coding:utf-8-*-From scrapy.contrib.spiders import Crawlspider, RuleFrom SCRAPY.CONTRIB.LINKEXTRACTORS.SGML import SgmllinkextractorFrom Scrapy.selector import Selector From Cnbeta.items import

The code is as follows: #! /bin/bashFiles_url= (https://pypi.python.org/packages/source/s/setuptools/setuptools-2.1.tar.gz#md5= 2044725530450d0517393882dc4b7508 https://pypi.python.org/packages/source/p/pip/pip-1.5.tar.gz)files= (setuptools

1. Install the Python virtual environment The code is as follows: Virtualenv--no-site-packages Env 2. Installing pyramid The code is as follows: $ env/bin/easy_install Pyramid 3. Use the Alchemy template to create a project The code is as follows:

[Error 2] The system cannot find the file specified Workaround:1. Environment variable Path added:C:\python32\tools\scripts;d:\python32;d:\program Files\sublime Text2;2.python.sublime-build Content ModificationOriginal content: The code is as

In Python 2.6, print is not a function, but a keyword, using the following method: The code is as follows: Print 1, 2print ' A ', ' B ' The results are displayed as follows, a space is printed between the items separated by commas and ends with

The use of Python to write some network services, when the network is not good, or resource consumption, task congestion, the situation will always throw some exceptions, the current task is terminated, you can use the @ decorator, write a retry of

What are the basic built-in data types for Python Some basic data types, such as Integer (number), string, tuple, list, dictionary, and Boolean types.As learning progresses, you will also be exposed to more and more interesting data types, as

Facing objects in OOP is a very important point of knowledge, and we can simply think of it as a collection of data and a method of accessing and manipulating that data. After learning the function, we know that if we reuse the code, why do we use

Installation method 1), Apt-ge installation The code is as follows: sudo apt-get install Flask-sqlalchemy 2), download the installation package for installation The code is as follows: # can be used directly in the PY after installationImport

The code is as follows: Import time def block (file,size=65536):While True:NB = file.read (size)If not NB:BreakYield NB def getlinecount (filename):with open (filename, "R", encoding= "Utf-8") as F:return sum (line.count ("\ n") for line in

After installing CentOS5.9 (Final), execute #python and #python-v, see version number is 2.4.3, very old, and before written is run on python3.x above, 3.X and 2.X have a lot of different, interested friends can refer to this

Environment Python 2.7.6,BS4, which can be run in PowerShell or at the command line. Make sure that the BS module is installed The code is as follows: #-*-Coding:utf8-*-# 2013.12.36 19:41 wnlo-c209# Grab a picture of dbmei.com. From BS4 import

directly on the code. The code is as follows: Import Smtplibmsg = Mimemultipart () #构造附件1ATT1 = Mimetext (open ('/home/a2bgeek/develop/python/hello.py ', ' RB '). Read (), ' base64 ', ' gb2312 ')att1["Content-type"] = ' application/octet-stream