Python

One, the meta-groupTuples (tuple) are like lists, with () wrapping elements, which are immutable types.Tuples can be placed within the various data, can not be increased, minus, change operations, only to view and delete. Here is the immutable type,

Companies need to do cross-platform hand-tour, because previously did COCOS2DX development, so ultimately chose it as a development tool, can not wait to configure theMy Computer's configuration1. Download COCOS2DXThis better go to the official

Today, when dealing with a MapReduce program with Streaming-python, I found that the reducer failed because of the memory-consuming limit! Look at the code carefully, found that there is a collection of URLs, and the URL length is relatively long,

1. Suitable for Chinese#coding-utf-8#coding: Utf-82, formatted output, at this time the escape character can not use \, only with%print ' Growth rate:%d \% '% 753 True and Falseif x: print ‘True‘As long as a non- x 0 value, a non-empty string, a

Apriori algorithm is the originator of data mining if pattern mining, since the 60 's began to popular, its algorithm is very simple and naïve, first digging out the length of the frequent pattern of 1, and then k=2Merging these frequent patterns

A custom function syntax structure:def fun1 ([X],[y],....):Statement 1Statement 2Use the def statement to define the function, write the function name, parentheses, arguments (none), colon, and then indent the function body after def1. No parameter

Quick View function How to use Help (ABS) #查看abs函数的使用方法definition of a functionIn Python, you define a function to use thedefstatement, which in turn writes out the function name, parentheses, arguments in parentheses, and colons:, and then, in the

Class student (object):      #定义一个类, the parentheses indicate that they inherit from that class, and do not know which class to inherit from, using the object class #     def __init__ (Self,name,score): #__init__是一个初始化的方法, defined parameters,

Read the medieval education about the Python Foundation for a while, the sense of grammar is very simple, a little bit lazy has not hit the code. Today finally take care of those who look like brick home customers, spare half an hour to write a

1.if statementsA single if statement can be by using the Boolean operator and, or, and not. If-elif-else. Elif that is else ifIf expression1:Expr1_true_suiteElif expression2:Expr2_true_suiteElseNone_of_the_above_suite2.while statementsWhile

1 #CODING=GBK2 ImportSys,urllib.request,re3 4URL ="Http://www.3322.org/dyndns/getip" #Web address5Mypage=urllib.request.urlopen (URL). Read ()6MyPage = Mypage.decode ('GBK')7Match = Re.compile ('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')8line

Sometimes there are some error-wrapping data, such as the correct data should be:20141010,aaa,bbb,ccc,ddd,eeeBut the actual data given here are:20141010,aaa,bbb,ccc,ddd,eeeIn this way, error wrapping occurs, and when some data is processed, it

1. Sequence member relationship operator (in, not in)2. Sequence type operatorsSequence operator actionSeq[ind] get the element labeled INDSeq[ind1:ind2] Gets the set of elements from Ind1 to Ind2seq * expr sequence repeats expr timesseq1 + seq2

Configuration method of Django static resource URL STATIC_ROOT, djangostatic_root Reason After configuring HTML pages, you need to use some static resources, slice, JS files, and CSS styles. However, using these resources in Django is not just a

In python, The readline method is used to determine the end of File Reading, This example describes how to determine the end of reading a file through readline in python. Share it with you for your reference. The specific analysis is as follows: As

Python uses Baidu API to upload files to Baidu online storage for code sharing, For details about how to obtain access_token, you can check the OAuth 2.0 API opened by Baidu. We will not introduce it here. Third-party Python Library Poster Copy

Python-Based Script sharing for monitoring server hard disk usage and python script This script is mainly used for the hard disk of the zabbix monitoring system. It is applicable to windows and linux systems and returns 0 as normal, if the remaining

Python set type operation summary, pythonset set type In Python, in addition to dictionaries, lists, and tuples, there is also a very useful data structure, that is, set. flexible use of set can reduce a lot of operations (although set can be

Python string operation, python string # Python string operations '''1. Copy the string '''# Strcpy (sStr1, sStr2)SStr1 = 'strcpy'SStr2 = sStr1SStr1 = 'strcp2'Print sStr2 '''2. connection string '''# Strcat (sStr1, sStr2)SStr1 = 'strcat'SStr2 =

Basic python crawler Regular Expression and python Crawler Next we will prepare a small crawler example using baibai.However, before that, we should first detail the relevant content of the Regular Expression in Python.The role of regular