Python

If judgmentThere are three kinds of if forms:1. If ...2. If ... else ...3. If ... elif ... else ...Instance:1INP = Raw_input ('>>>')2 ifinp=='1':3 Print '111'4 elifINP = ='2':5 Print '222'6 Else:7 Print '...'CodeNote: Indents are four

Class Unrarmodel: def __init__ (self, filepath): Self.rar = Rarfile. Rarfile (filepath) self.infolist = Self.rar.infolist () def extral_list (self, selected_dir): selected_ Infolist = [] for D in Selected_dir:

A network FoundationThe Internet Protocol is divided into OSI seven layer or ip/tcp five layer, ip/tcp four layer according to function.Data Link layer: There is an Ethernet protocol, Ethernet, a set of electrical signals called a datagram, also

Today's record is a small point of knowledge-the function scope + adorner:Legb:l>e>g>bl;local function Internal Scopee:enclosing function inside and inline functionG:global Global scopeB:build-in built-in scopesCoding && Result:Closures ( Closure):

1. Open () syntaxOpen (file[, mode[, buffering[, encoding[, errors[, newline[, Closefd=true]])The Open function has a number of parameters, commonly used are file,mode and encoding file location, quotation marks required mode file, see 3 belowThe

First of all, welcome!The following abstracts from Baidu Library:Python: An object-oriented, interpreted computer programming language, invented by Dutchman Guido van Rossum in 1989, the first public offering was released in 1991.July 20, IEEE

This is about the built-in method in the string, after all, the string is the most commonly used operand.[' __add__ ', ' __class__ ', ' __contains__ ', ' __delattr__ ', ' __doc__ ', ' __eq__ ', ' __format__ ', ' __ge__ ', ' __getattribute__ ' ', ' __

Multiplication between arrays created with NumPy in PythonImport NumPy as NPWhen an array of numpy modules is multiplied, there are two ways: the first is the Matrix, and the second is the multiplication of each.Use the Np.dot () function when you

This section focuses on a simple example of inter-threading communication, using a thread-safe data structure for the queue. Queue saves the content of inter-thread communication,ImportQueue fromThreadingImportThread

Network Communication Standard---network protocolInternet Protocol--osi Seven layer protocolFive-tier protocol: Application layer: Application layer, presentation layer, Session layerTransport Layer: Transport LayerNetwork layer: Network layerData

1. CentOS6.5 install Python's dependency packageYum Groupinstall "Development tools"Yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel Libpcap-devel Xz-devel2, download the Python3

The action related to URL requests in Python involves modules with urllib,urllib2,requests, where Urllib and Urllib2 are Python's own HTTP access standard library, and Requsets are third-party libraries that need to be installed on their own.

Lead:Python2 and Python3, because of the default character set of the differences caused by the trouble, it is a programmer's nightmare! To completely say goodbye to this problem, you need to understand coding and decoding in essence.Why do I have

how Python makes Chinese comments : website resolve Python unicodeencodeerror: ' ASCII ' codec can ' t encode : URL 1 URL 2 URL 3 Python Convert string to date format: Site 1 , Site 2 Python reads and writes Json

Here is a collection of small knowledge points, for the convenience of later search.Line and indent:Physical line: The number of lines of code actually seen.Logical line: function in meaning (that is, the number of rows performed by the

Objective:What is a cookie?Cookies are data (usually encrypted) stored on the user's local terminal by certain websites in order to identify the user and track the session.For example, some sites need to log in to access a page, before you log in,

1. Download python for WindowsNonsense not to say, directly on the website: https://www.python.org/ftp/python/3.5.1/python-3.5.1.exe2. Install Python for WindowsAfter running the installation file, you will see this page:I have to say that the

: This article for Bo Master original article, without Bo Master permission not reproduced.The following is an excerpt from the Baidu Question answer:Strictly speaking, there is only one difference between them: when Windows runs them, different

fromLoggingImport*ImportSYSdefMain (): Basicconfig ( level=WARNING, Stream=Sys.stdout,#filename= ' Log.log ', #filemode= ' A ',format='% (asctime) s\t% (filename) s\t% (Lineno) d\t% (message) s\t% (levelname) s\t'

Python learning notes (1) ---- python installation, python ---- python 1. Download Python for windows Don't talk nonsense, directly on the web site: https://www.python.org/ftp/python/3.5.1/python-3.5.1.exe 2. Install Python for windows After running