Python

First of all, the library used here is a library created by the teacher when learning Coursera.#timerimport simpleguiimport random# Global statemessage = "Python is fun!" Position = [50]width = 500height = 500interval = 2000#handler for Text boxdef

While reading the source of the Wiki module in Trac, I discovered that the key word of yiled was used in many places.The feeling is to replace return with yield in the place where you need to return a value,Not very clear about its usage, so study

The 32-33 chapters will be for-loop and while-loop loops.The two kinds of syntax will not be said. Simply say the individual's understanding for and while.I think he learn python.First say the same point:1, can not do a single operation, For-loop if

Examples are as follows:Import botofrom boto import connectionimport OS, mathfrom Filechunkio import filechunkio# fill in the id and keyconn = bot O.CONNECT_S3 () print conn# fill in your buckets Namebucket = Conn.get_bucket () print bucket# your

Recently in a script to try an automatic punch, found a few questions, hereby recorded.Environment:Ubuntu 12.04.4 LTSSelenium 2.43.0Firefox 32.0.31 Originally the machine Selenium,firefox are installed, but Firefox updates from time to time, so

#the statement at the beginning is a commentWhen the statement ends with a colon ":", the indented statement is treated as a block of code. Generally indent 4 spacesThe Python program is case-sensitive, and if the case is written incorrectly, the

The OS module can be used to execute the cmd command, which can be used to achieve a timed shutdown, but in the process of waiting for shutdown can not do nothing, so multi-threading comes in handy.#! /usr/bin/env python#coding=utf-8# here need to

Python provides two ways to parse XMLSAX Simple API FOR XMLSuitable for parsing large files, because parsing content is not saved in content, but is invoked when parsing to related contentDOM Document Object ModelReads the entire document into

1 questionsIn the background field, often using Python to do some simple service, achieve faster, more flexible changes, compared to C + +, the cost is much lower. As a back-office service, you want the service to be able to output log data in

Returns Trueif all the elements of an object that can be iterated are all non-empty (or an empty iteration object). This function is mainly used to determine whether the list, tuples, dictionaries and other objects have empty elements, such as a

Title: Python parsing Baidu Web page source code: Take the search engine returned the first page_num*10 link URLrecently, because of doing "information search" homework, need to search search engine for a query, manually find those search engine

Server-side code:Import Socket,commandshost = ' Port = 1053s = Socket.socket (socket.af_inet,socket.        Sock_stream) S.bind ((Host,port)) S.listen (1) while 1:conn,addr = S.accept () while 1:data = CONN.RECV (1024)                CC,BB =

He following error occurred while trying to add or remove files in theInstallation directory:[Errno 13] Permission denied: '/library/python/2.7/site-packages/test-easy-install-2452.write-test 'The installation directory you specified

Create list:l = [' Adam ', ' Lisa ', ' Bart ', ' gechong ', ' kongming ']Show List:l[0]Traversing List:print (L) and for loopsUpdate List:append () and insert () and direct assignmentDelete List:pop () and pop (n)List features:can add deleteLi = ['

A TCP/IP and socket we need to have a certain understanding of the network transmission, especially the TCP/IP protocol and socket.Socket is a method of interprocess communication, which is based on the upper interface of network transport

Based on the understanding of the basic syntax of Python, it is possible to freely assemble a variety of advanced functions that you need.Because of the characteristics of Python language, the implementation of various functions will be very

Novice Python often makes mistakes (part two)Forwarded from: http://blog.jobbole.com/43826/ScopeIn this article, let's focus on the scope where Python is misused. Usually, when we define a global variable (well, I'm saying this because the need for

3.1 The assignment of a Python variableThe equal sign (=) is the primary assignment symbol: Anint = astring = ' Hanxingzhi 'However, it is important to note that the assignment is not assigning a value to a variable.3.1.1 Chain assignment and

Python dictionary and python beginners A dictionary consists of multiple keys and their corresponding values (the key-value pair is an item). Each key and its value are separated by a colon, items are separated by commas (,), and the entire

Python implements multi-threaded download instances based on queue and threading, and queuethreading The example in this article describes how to implement multi-threaded download using python Based on queue and threading. The specific method is as