Python

One: NumPy moduleNdarray: A multidimensional array that stores a single data typeUfunc: functions capable of handling arrays (Universal function Object) # numpy usage, specify Start value/End value/step to create one-dimensional array of arrays,

A regular expression is a Swiss army knife that searches for a particular pattern from information. They are a huge library of tools, some of which are often overlooked or underutilized. Today I will show you some high-level usage of regular

#/usr/bin/env python# -*- coding: utf-8 -*- import time,datetime,socket, urllib,urllib2,cookielib# because I was going to pick up Monday of the time today so write 10 here, time should be November 2014 24 last week Monday,threedayago =  (

4.1 If expressionAs the most well-known if. You must not be unfamiliar with some of these expressions:>>>X=Int(Raw_input("Please enter an integer:"))Please enter an integer:42>>>IfX0: ... x = 0 ... print ' negative changed to zero ' ... elif x == 0

Last week, I bought a book called "Fun to learn Python programming" (English name: Python for kids), yesterday after reading the book after the title has been done. As the 1th and 2 chapters do not have exercises, the 13th chapter and then are

#!/usr/bin/python#XMLtoCSV. py#encoding: Utf-8Import CSV, OSFrom Xml.dom.minidom Import Parsedef createcsvfile (Fileprefix):CSVFile = open (fileprefix+ '. csv ', ' WB ') #注意是二进制写入, otherwise there will be extra spacesCsvwriter = Csv.writer

Hide Data You may have realized that there are two ways to view or modify data (properties) in an object. can be accessed directly, like this:Mydog.cooked_level = 5Alternatively, you can use methods that modify the properties, such as:Mydog.cook

This function is a string used to dynamically execute an expression, or a code object compiled by the compile function. The argument expression is an expression string, or the name of the compiled code object; parameter globals is a global

Class Basehttprequesthandler (Socketserver. Streamrequesthandler)HTTP Request Handler base class.|| The following explanation of HTTP serves to guide you through the| Code as well as to expose any misunderstandings I| HTTP (so you don't need to read

Linux/include/uapi/asm-generic/errno.h1 #ifndef _asm_generic_errno_h 2 #define _ASM_GENERIC_ERRNO_H 3 4 #include 5 6 #de Fine Edeadlk 35/ * Resource deadlock would occur * /7 #define Enametoolong 36/ * File name too long * /8 #define ENOLCK 37/ *

e.g. a=[[3,789],[1,100],[1,102],[2,102],[1,106],[2,456]]; Convert to a dictionary b={1:[100,102,102],2:[102,456],3:[789]}If cast is used:1 >>> a=[[3,789],[1,100],[1,102],[2,102],[1,106],[2,456]]; 2 >>> b=dict (a)3 >>> b4 {1:106, 2:456, 3:789} 5The

ImportSocketImportSysport=51423Host="localhost"Data=b"x"*10485760#在字符串前加 B is the string into the bytes class. sock=Socket.socket (Socket.af_inet,socket. Sock_stream) Sock.connect ((host,port)) Byteswritten=0 whilebyteswrittenlen (data):

Python Write a send and receive data with the socket, their own test concurrency can reach 10k+, with a 20-minute one, not much direct code#!/usr/bin/python#coding:utf-8# author:51reboot.comimport socket,selectimport os,sys,copyhost  =  ' 0.0.0.0 '

1, co-process: A program control mechanism. Asymmetric co-operation: provides two types of control over the transfer program. One is to call the association, and the other is to suspend the current process and return the program control to the

#-*-Coding:utf-8-*-# python:2.x__author__ = ' Administrator 'Import datetime as SPrintDef a ():d={' Monday ': U ' week 1 ',' Tuesday ': U ' week 2 ',' Wednesday ': U ' week 3 ',' Thursday ': U ' week 4 ',' Friday ': U ' week 5 ',' Saturday ': U '

First, the Basic authentication of http:During the communication of the HTTP protocol, the HTTP protocol defines the Basic authentication process to allow the HTTP server to authenticate the user to the Web browser, and when a client makes data

Python standard library: built-in function eval (expression, globals = None, locals = None) This function is a string used to dynamically execute an expression or a code object compiled by the compile function. The expression parameter is an

Solution for Django to forget the Administrator account and password: django account After looking at the Django tutorial to build a website, I forgot my first account and password. As a result, you cannot log on to the Management page and cannot

A detailed introduction and example of closures in Python, and a detailed introduction to python I. Closure From wiki: Closure is short for Lexical Closure, a function that references free variables. This referenced free variable will exist with

Python Study Notes 20: Server advancedIn the previous article, we used only the socket interface without relying on the framework and CGI to complete a Python server that can process HTTP requests.Based on this, any computer with an operating system