aha s

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Object copying in Python

. what do you need to talk about? Have you ever wondered if I don't want to change the original object? If so, let's take a look! Assume that I now have a list called l1, and now I need a copy of l1. if I directly use methods such as l2 = l1, then I make a series of modifications to l2, it is equivalent to directly modifying l1. this is not what I want! For example: l1 = [1, 2]l2 = l1l2.append(3)print l1print l2# l1 = [1, 2, 3], l2 = [1, 2, 3] This is caused by Python reference transfer. that

Full Record of crawler writing for python crawlers

can simply look at PostData. We can see that two data types are POST, stuid and pwd. The Redirect to of Type indicates that the bks_login2.loginmessage page is displayed after the POST is completed. From this we can see that this data is the form data submitted after clicking OK. Click the cookie tab to view the cookie information: Yes, I have received an ACCOUNT cookie and will automatically destroy it after the session ends. What information is received after submission? Let's take a look at

Learning PHPCookie processing function _ php instances

other complex structures. 2. get cookieAfter creating a cookie, you can use the predefined variable $ _ COOKIE to obtain the cookie. However, the cookie can only be obtained on other pages, because in php, the configured cookie does not take effect on this page unless the page is refreshed.Instance: The reason for refreshing the page is that the cookie value is not stored in the c ookie variable immediately after setcookie () is called, but is sent to the server as the http request is sent,

Original: full-body crash-Tips for clearing windows login logs

more unusual is to use the Management Group Command. Net localgoup. In this way, the smart administrator can use the net user guest command to view the last logon date of the guest account .. the system is intruded and exposed. What should I do? I checked the information online and found nothing about how to modify the last logon date of my account. No way. solve it by yourself. After half a day of research with John, he was unable to delete and reconstruct the system, modify the system date, a

Installing Redmine 2.5.2 under Windows is not a complete guide

/400/fill/i0jbqkfcma==/dissolve/70 /gravity/southeast "/>Ah, aha. Yes, rubyinstaller.org, that's it. I picked up the Ruby 2.0.0-p576 download, found the Ruby/thread.h file in the 7z package, and copied it to the C:\RailsInstaller\Ruby1.9.3\include\ruby-1.9.1\ruby folder below.Is everything all right?Run the gem install MYSQL2 again. Wrong again ...Rattling. I can't find mysqlclient this library!Depending on the error message, you need to specify the l

Usage of Mysql injection points after the limit keyword

ANALYSE(1); ERROR 1386 (HY000): Can't use ORDER clause with this procedure ANALYSE supports two parameters. Try two parameters: mysql> SELECT field FROM table where id > 0 ORDER BY id LIMIT 1,1 PROCEDURE ANALYSE(1,1); ERROR 1386 (HY000): Can't use ORDER clause with this procedure Still invalid. Try to insert the SQL statement in ANALYSE: mysql> SELECT field from table where id > 0 order by id LIMIT 1,1 procedure analyse((select IF(MID(version(),1,1) LIKE 5, sleep(5),1)),1); The response

Calculate the actual cell height using the new iOS8 feature

=uitableviewautomaticdimension; Self.contentary= @[@"ha ha haha",@"haha haha haha ha ha ha haha haha ha ha haha haha haha ha ha haha haha haha haha ha ha haha",@" aha haha haha haha haha haha haha haha haha ha ha haha",@"haha haha haha ha ha ha haha haha haha haha haha hahaha ha ha ha ha ha ha ha ha haha hahaha haha ha ha ha ha ha ha ha ha ha haha haha hahaha haha haha haha haha ha ha ha haha haha haha haha ha ha ha ha ha ha ha ha ha ha ha ha ha ha h

Send JSON to the server

-(void) Touchesbegan: (Nsset *) touches withevent: (uievent *) event{//1.URL Nsurl *url = [Nsurl urlwithstring:@ "http: Localhost:8080/mjserver/order "]; 2. Request Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url]; 3. Request method requests. HttpMethod = @ "POST"; 4. Set the request body (Request parameters)//Create a JSON data describing the order information nsdictionary *orderinfo = @{@ "shop_id": @ "124 3324 ", @" Sh

Investigate the evolution of the iOS development environment

the recommended options in the Installation Wizard, that is, the best for yourself. (Example: In the network type add in the network tutorial most of the choice is to use the bridge network, and we have to choose to use the network address translation NAT, do not ask me why. )3. The version format of OS X you downloaded , it is recommended to download the lower version such as 10.9,10.8 and ISO format. most of the resources given on the network are in DMG format, which is the Apple OS applicat

Android Inter-process communication data (ii) implementation of------parcel

: *reinterpret_cast val; return finishwrite (sizeof (Val)); } = Growdata (sizeof (Val)); if Goto restart_write; return err;}Let's analyze writealigned:First,#define PAD_SIZE (s) (((s) +3) ~3)~3:Consider 16-in, 0x11111100 That is, the previous 6 bits are unchanged, and the last 2 bits are 0.In other words, turn the last 2 bits into 0. That is, a multiple of 4.The purpose of +3 is to take the current value up to the nearest divisible 4 value, if that is the same.So th

Various search engines

1. Search engineWho did you first think about? Aha,google first! again Baidu a bit.But first you have to search the search engines on your own and beg me.Http://google.comHttp://baidu.comhttp://search.msn.com/http://www.jux2.com/http://comparesearchengines.dogpile.com/http://instant.search.yahoo.com/http://search.yahoo.com/cchttp://search.creativecommons.org/http://creativecommons.org/find/http://www.allyourwords.com/http://www.technorati.com/http://b

Queue--Decrypt QQ number

able to write it out.First, an array is required to store this number of strings, which is intq[101]. and initialize this array as intq[101]={0,6,3,1,7,5,8,9,2,4}; (Here I write more than a 0 to fill the q[0], because I prefer to start with the q[1], array initialization is not very understanding students can go to see my last book, AHA C! Think fast you step) next is the process of simulating decryption.The first step in decryption is to delete the

Compiler built-in macro __line__

//description:helloworldinc++,ansi-style //============================================================================ #include #define __debug__ #ifdef __debug__ #define NBSP;DEBUG (format,...) printf ("file:" __file__ ",line:%05d:" format "/n", __line__,# #__VA_ARGS__ ) NBSP;NBSP; #else #define NBSP;DEBUG (format,...) NBSP;NBSP; #endif int charstr[]= "Helloworld" ; debug ( Span class= "string" style= "margin:0px; Color:blue; Border-styl

[temporary] major contribution of cardiac regeneration through gata41 heart muscle zebra Fish

, pvetal.estimationofconductionvelocityvectorfieldsfromepicardial map data. IEEE Cross. Biomedical Sciences. Engineering. 45,563-571 (1998). Thanks to J. Burris and a. Eastes Zebra fish Care, X. Meng and Development Studies hybridoma Cell Bank antibody, M. Gignac's help, electron microscope, lab members ' comments on manuscripts, and G. Burns P. Shambon and G. The plasmid of the Felsenfeld. This work is supported by the American Heart Association (KK and YF), JDRF (RMA) and JSP (KK) to support t

Ten years-to Charlie Vogt

team thinking on our feeling?When I-Talk toour Mr CPO, I-want to has a face-to-face with you, I receive no feedback.Not sure if you do not receive any of my voice or your would not think it isnecessary to give me a feedback.You can say,just ' call me. Why isn't? "Aha, I has to say, "I am afraid to does this", what should I say, "Please, does not close us?" or "Please, give us a reason to Closeus? "Did it make anysense? I believe not.You can say, Iam

New features and enhancements of vnx oe for Block v05.32.000.5.006 and vnx oe for File v7.1.47.5

: This function supports failover between the local and remote VNX gateways.· File Level Retention (FLR) internal locking and deletion: This function provides an internal policy engine on the File system, you can automatically set the file retention time and apply it to the written file. It also provides the ability to automatically delete files when they are retained and expire.· Default minimum/maximum file-level retention time· File-level retention date: you can enter a r

Solve ClassNotFoundException:org.h2.Driver

voidMain (string[] args)throwsException {inputstream InputStream= H2databasetest.class. getClassLoader (). getResourceAsStream ("Db.properties"); Properties Properties=NewProperties (); Properties.load (InputStream); String Driverclass= Properties.getproperty ("Jdbc.driverclass"); String Jdbcurl= Properties.getproperty ("Jdbc.url"); String username= Properties.getproperty ("Jdbc.user"); String Password= Properties.getproperty ("Jdbc.password"); Class.forName (Driverclass); Connect

php, why 0 = = ' abc ' is set up?

0== ' is set up I do understand that 0== ' ABC ' also set up don't understand, please advise! Reply content: 0== ' is set up I do understand that0== ' ABC ' also set up don't understand, please advise! Aha, the first two days just looked at the relevant article, this is because you are a number and a string to compare, PHP will convert the string into a number and then compare .The rules for PHP conversion are: If the string starts with a numb

Several big mistakes in data mining are "reproduced, invaded and deleted"

), but may also be the answer to the question (such as the ozone hole). So you need to check these exceptions carefully.The most exciting words in the study are not "Aha!" "But" it's a little strange ... "Inconsistencies in the data can be a clue to the problem, and digging deep down may solve a big business problem.For example:In direct mail marketing, the data found during the merging and cleaning of home addresses is inconsistent, but may be a new

JSOND -- a better PHPJSON parser

JSOND -- a better PHPJSON parser JSOND: a better php json parser First, let's take a look at the performance test data: 01 STR: {"I": 23, "array": [1, null, false, true, ["aha", "baba", 23, {"test ": 23}]} 02 JSON: time for 100000 iterations: 0.238321 03 JSOND: time for 100000 iterations: 0.236436 04 05 STR: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] 06

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