Python

I. Introduction of IPython IPython is an interactive Python interpreter, and it's more efficient. It differs from most traditional working modes (edit-and-compile-run),The working mode it uses is: Execute-and explore, and most of the code related

I. Overview of OS ModulesThe Python OS module contains common operating system features. This module is especially important if you want your program to be platform-agnostic. (in one's language)Second, common methods1, Os.nameThe output string

Before, I explained the problem of object assignment in Python in python– memory management, and we already know that when we create an object and assign it to another variable, we don't actually copy the object. Instead of just adding a reference

First use of the crawler Baidu glutinous rice provided by the API to capture the day of Beijing's group purchase information, save as Numi.htmlImport Xml.etree.ElementTree as ETImport OSClass Nuomi ():def __init__ (self):Self.numi=[]def Parse

#!/usr/bin/env python#-*-coding:utf-8-*-it = iter ([1,2,3,4,5]) whileTrue:Try : x=Next (IT)Print(x) except stopiteration as e: Print('Catch Stopiteration') BreakBecause the Python iterator object represents a data stream, the iterator

DescriptionWhile using Python, we may need to use some other functions that others have written in addition to the built-in functions. Or the code we write is also expected to be available to others. To implement such a function, we need to define

Reference Blog: http://www.cnblogs.com/Camilo/archive/2013/09/21/3332267.htmlHttp://www.cnblogs.com/SunWentao/archive/2008/06/19/1225690.html1. String constantsString.digits: A string containing 0-9String.letters: String containing all uppercase and

UTC Green Time = = "East Eight districtOriginal date format:Utctime = ' 2016-07-26 10:08:29 'LocalTime = (Datetime.datetime.fromtimestamp (Time.mktime (Time.strptime (utctime, '%y-%m-%d%h:%m:%s ')) + Datetime.timedelta (hours = 8)). Strftime ("%y-%m-

Python provides two levels of access to network services. ： The low-level network service supports the basic socket, which provides the standard BSD Sockets API to access all the methods of the underlying operating system socket interface.

A regular expression is a special sequence of characters that can help you easily check whether a string matches a pattern.Python has added the RE module since version 1.5, which provides a Perl-style regular expression pattern.The RE module enables

Python BasicsOne, integer (int)such as: 18, 73, 84Functional methods and examples of integer classes:The method with __ represents a variety of expressions1.__ABS__ ABS ()To find the absolute value of an integer: ( -11). __abs__ () ABS (-11) with

Basic data typesOne, integersuch as: 18, 73, 84Each integer has the following functionsint (integral type)On a 32-bit machine, the number of integers is 32 bits and the value range is -2**31~2**31-1, which is -2147483648~2147483647On a 64-bit system,

IntroducedRABBITMQ is a complete, reusable enterprise messaging system based on AMQP. He follows the Mozilla Public License open source agreement.MQ is all called the message queue, and Message Queuing (MQ) is an application-to-application

As we all know, for all Web applications, is essentially a socket server, the user's browser is actually a socket client.A simple socket code that can be accessed by a browser:#!/usr/bin/env python#coding:utf-8  import socket   def handle_request

Reference: 1190000000666603 http://blog.csdn.net/zhoudaxia/article/details/23853609 #使用cpython PyPy for improved performance http://www.ibm.com/developerworks/cn/linux/l-cn-python-optim/ Optimization of the algorithm time complexityThe time

Classes and instancesA class is associated with an instance: A class is the definition of an object, and an instance is a "real thing," which holds specific information about the objects defined in the class. The following example shows how to

some of the scenarios for Python performance improvements. One, function call optimization (space span, avoid access to memory) The core point of optimization of the program is to minimize the operation span, including the span of code execution

Python and Bubble sorting, python Bubble Sorting In the previous article, we introduced a very fast sorting algorithm-bucket sorting, but its disadvantage is that it consumes too much resources. The algorithm to be implemented this time does not

Using Python to operate MySQL SQLAlchemy and pythonsqlalchemy SQLAlchemy Is An ORM framework in the Python programming language. It is built on Database APIs and uses relational object ing for database operations. To put it simply, convert an object

Python SQLalchemy module connects to and operates MySQL basic example, pythonsqlalchemy I. SQLalchemy IntroductionSQLAlchemy is an open-source SQL Toolkit, an object-link er released with an MIT license for the basic Python programming language.