Python

The default installed Ftplib module in Python defines the FTP class, where functions are limited and can be used to implement simple FTP clients for uploading or downloading files.FTP Workflow and basic operation can refer to the protocol RFC959.

1 Copy the following code to a file and name it forkcore.py Copy Code code as follows: Import OS Import threading Import Select Import socket Class Ds_forkcore (object):#async IO (Epoll)def ds_epoll (self):Epoll=select.epoll

1 Copy the following code to a file named asyncore.py Copy Code code as follows: Import socket Import Select Import Sys def ds_asyncore (addr,callback,timeout=5):S=socket.socket (Socket.af_inet,socket.

Copy Code code as follows: Import socket Import Queue Import threading def worker ():While True:i = Q.get ()CONN=I[0]ADDR=I[1]While 1:SMS=CONN.RECV (1024)If sms!= "":Print "Message from" ("+str (addr[0]) +": "+str (addr[1]) +"):

What is an iterator?An iterator is a simple object with the next method, and of course implements the __ITER__ function. An iterator can iterate over the value of a sequence, and the next method throws a Stopiteration exception when there is no

1, first find an online idiom website 2, view the structure of the Web page, define the regular styleLook at the label of the idiom to grasp what is the characteristics of the source, you can find to catch the idioms are in tags, such as:

Beautiful photo!: http://www.beautifulphoto.net/ Copy Code code as follows: Import Urllib2 Import re _random_url = R ' http://www.beautifulphoto.net/plugin/RndArticle/'_img_patt = Re.compile (R ' ") Def random (timeout=3,

How to create a thread object in a python multi-threadIf you want to create a thread object, it's very simple as long as your class inherits threading. Thread, and then call threading first in the __init__. The __init__ method of thread can be

Copy Code code as follows: # Encoding:utf-8 Import Thread Import time # a function to be executed in a thread def func (): For I in range (5): print ' func ' Time.sleep (1) # End Current Thread # This method is equivalent to Thread.

Prerequisite: Install LIBXML2 Libxstl Official website: http://xmlsoft.org/XSLT/index.html installation package Download: http://xmlsoft.org/sources/ The following is the EXE installation file download for the Windows platform:

Copy Code code as follows: #!/usr/bin/env/python #coding =utf-8 Import Mechanize Import Cookielib # Cookie JarCJ = Cookielib. Lwpcookiejar () # Browserbr = Mechanize. Browser ()Br.set_cookiejar (CJ) # Browser

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

Copy Code code as follows: From Sgmllib import Sgmlparser Import Urllib2 Class SGM (Sgmlparser):def reset (self):Sgmlparser.reset (self)Self.srcs=[]Self. Istrue=true     def start_div (Self,artts):         for k,v in Artts:            

Urllib the application of the basic module, through this class to obtain the HTML document information in the URL, the internal can rewrite the method of obtaining the proxy Copy Code code as follows: Class Proxyscrapy (object): def

1 Copy the following code to a file named asyncore.py Copy Code code as follows: Import socket Import Select Import Sys def ds_asyncore (addr,callback,timeout=5):S=socket.socket (Socket.af_inet,socket.

Python implements two text merges The employee file records the work number and the name Copy Code code as follows: Cat Employee.txt: Jason Smith John Doe Sanjay Gupta Ashok Sharma Record work numbers and wages in

deleting files Copy Code code as follows: Os.remove (filename) # filename: "File name to delete" Possible causes of an exception: (1) filename does not exist(2) The filename file, no permission to operate or read-only.

Example: Copy Code code as follows: def re_escape (FN): Def arg_escaped (This, *args): t = [Isinstance (A, Verex) and A.S or Re.escape (str (a)) for a in args] RETURN FN (this, *t) Return arg_escaped function

There are two types of callback functions: Copy Code code as follows: Blocking callbacks (also known as synchronous callbacks or just) Deferred callbacks (also known as asynchronous callbacks) So, how do you implement the callback

Copy Code code as follows: From selenium import Selenium Class Myspider (Crawlspider):name = ' Cnbeta 'Allowed_domains = [' cnbeta.com ']Start_urls = [' http://www.jb51.net '] Rules = (# Extract links matching ' category.php ' (but not