c programming lessons

,)) #创建写进程 pr = Process(target=read, args=(q,)) #创建读进程 pw.start() pr.start() pw.join() pr.terminate() # pr进程里是死循环，无法等待其结束，只能强行终止；terminate方法实现if __name__ == ‘__main__‘: main()#结果：put a to queue.put b to queue.put c to queue.put d to queue.2. Message Queuing PIPE The Pipe method return (CONN1,CONN2) represents the two end of a pipeline. The pipe method has the duplex parameter, if the duplex parameter is True (the default), then the pipeline is full

seem to be too many to write multiple logistic regression article. So I found the relevant information on a foreign site, but did not see the derivation process. The URL is: http://blog.datumbox.com/machine-learning-tutorial-the-multinomial-logistic-regression-softmax-regression/. He did it according to Wunda's theory, where J (Theta) is what we call the Ein.(3) Answer: the second17. Question 17th、(1) Test instructions: The meaning of this problem is that we know from the 16 of the Ein method o

(name) : Gets the value of all keys in the hash corresponding to namehvals (name) : Gets the value of all values in the hash of the name corresponding to#!/usr/bin/env python#-*-Coding:utf-8-*-Import RedisPool = Redis. ConnectionPool (host= ' 192.168.10.128 ', port=6379)R = Redis. Redis (Connection_pool=pool)R.hmset (' Test ', {' K1 ': ' v1 ', ' K2 ': ' V2 '})Print (R.hkeys (' Test '))Print (r.hvals (' Test '))#结果:[B ' K2 ', B ' K1 '][B ' v2 ', B ' v1 ']hexists (Name,key) : Check if the hash na

commands, such as Commands.getoutput (' ls/tmp/')Commands.getstatusoutput (): Used to execute shell commands and return status codes after command executionFour, sys moduleSys.exit (): Used to exit the entire scriptSys.stdin.read (): For receiving standard input, waiting for keyboard input after executionSys.stdout.write (): Used to output standard output, such as Sys.stdout.write (' Hello ') will print out Hello, default non-newline characterSys.stderr.write (): Used to output standard error o

different virtual hosts• Limit different open_basedir for different virtual hostsWith Php_admin_value Open_basedir "/data/wwwroot/111.com:/tmp/" to limit the directory, and for a number of different virtual hosts to restrict different open_basedir, you can use the first virtual host above to limit(Why take temporary files?) Because the default temporary files under/tmp/, so that even temporary files are not written)[Email protected] php-7.1.6]# curl-a "a4l"-x127.0.0.1:80 111.com/2.php123[[email

In the company to do a development of sharing, share in the development process of some of the experience gained. Despite his confidence, he was hit hard after the speech, and despite the lack of recognition of the effect, many lessons were learned.Inaccurate positioning. I will share the theme of "development", hoping to "impart" some thoughts and methods that I think are very important, but obviously too optimistic. Although two heavyweight executiv

case of an amount of 125 kilograms, if the empty duty per kilogram is 100 yuan, then the Air Company will charge you 12. 500 yuan instead of 2,000 yuan Oh. If you only report 2,000 dollars to the guests, and then want to add to the difference, or to change the price, the guests are not necessarily willing to accept. Because the quote once the signature of the seal is a promise, if the number of changes in a pile, the report is not counted, not only affect the reputation of the business, but al

Here I want to organize, share the experience of Windows 7 installation lessons, I hope to help. Download: Windows 7 Release Candidate (RC) http://www.mininova.org/tor/2560296 First, choose a good installation method You have now downloaded the ISO image and burned it to a DVD. Next you have two options to run the installer. The difference in the performance of Windows Installer depends on which way you choose. If your system is already installed

/php.ini Edit php-fpm.conf [[emailprotected] php-5.6.32]# cd /usr/local/php-fpm/etc/ ##到这个目录下来[[emailprotected] etc]# vim php-fpm.conf ##这个目录没有php-fpm.conf文件vim直接创建编辑，编辑这个配置文件到https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D15Z/php-fpm.conf里拷贝样例 Configuration file Content Explained [global] ##全局的参数pid = /usr/local/php-fpm/var/run/php-fpm.pid ##PID定义路径error_log = /usr/local/php-fpm/var/log/php-fpm.log ##log路径[www]

, through this parameter can be very clear know the current system query memory is sufficient, is more, or not enough, we can make adjustments according to the actual situation. In general, 4G memory setting 64M is sufficient. 8) thread_cache_size indicates that the number of threads stored in the cache can be re-used, referring to the following values:1g-> 8 2g-> 3g-> >3G-> 64In addition, there are a few more key parameters: 9) Thread_concurrency This value is set to twice times the number of C

current database version select version (); View database status Show status; View each parameter show variables; Show variables like ' max_connect% '; (where% is a wildcard character) Modify the parameter set global max_connect_errors=1000; (this is only a temporary change, if you want to restart after the reset is still the value of our changes, then we have to quit MySQL, and then change the MYSQL.CNF configuration files under Linux. ） View queue show Processlist; Show full processlist; this

different for replication to work.Check whether the/data/mysql/auto.cnf uuid of the master and slave server is the same, if you delete one and restart the server again, the change master operation from server MySQL will succeed. 17.5 testing master-Slave synchronizationDefined in MY.CNF: can be in the Lord, or in theOn the primary serverbinlog-do-db=//Synchronize only the specified libraries, multiple can be used, to splitbinlog-ignore-db=//Ignore specified libraryFrom the serverre

written by C + + programs, the Java program can be fetching read, and vice versa.Toss half a day after finding the reason: the Java API reads with the DOC.GETXXXX (String) method, regardless of the order.mongocursor collection.find (docfilter). iterator (); while (Cursor.hasnext ()) { = cursor.next (); // reading order does not matter int col2 = Doc.getinteger ("COL2"). Intvalue (); long col3 = Doc.getlong ("COL3"). Longvalue ();

"End_date_active", "Sales_office_ CODE ", " Sales_office_name ", " Sales_region_code ", "Sales_region_name", "salesrep_id", "Salesrep_name", "Salesrep_number"; SQL Select "End_date_active", "Sales_office_code", "Sales_office_ NAME ", " Sales_region_code ", " Sales_region_name ", "salesrep_id", "Salesrep_name", "Salesrep_number" from Dw.dbo. " Bi_salesreps "; STORE bi_salesreps into D:\QLIKVIEW_QVD_NEWDW\DW\BI_SALESREPS.QVD (QVD); drop table bi_salesreps; Bi_

-------------------------------------------------------------------------./configure--prefix-/usr/local/nginx--with-http_ssl_moduleMakeMake install/USR/LOCAL/NGINX/SBIN/NGINX-V//View configuration information/usr/local/nginx/sbin/nginx-t/etc/init.d/nginx Restart//Restart service-------------------------------------------------------------------------NETSTAT-LNTP//view listening port 443Mkdir/data/wwwroot/aming.comecho "SSL test page." >/data/wwwroot/aming.com/index.htmlEdit hosts, add 127.0.0.1

Firewalld#systemctl Disable FIREWALLD#iptables NVLClose the service process with the command #/usr/local/tomcat/bin/shutdown.shExtendedJava Container comparison http://my.oschina.net/diedai/blog/271367Http://www.360doc.com/content/11/0618/21/16915_127901371.shtmlRelationship between Java EE, J2SE, EJB, JavaBean, Serverlet, JSP http://bbs.csdn.net/topics/50015576Tomcat Server.xml Configuration Detailed http://blog.csdn.net/yuanxuegui2008/article/details/6056754Tomcat Common Database connection m

Tags: xftp pure-ftpd15.4 Xshell using XFTP to transfer filesDownload xftp software from www.netsarang.com websiteor, xftp:http://pan.baidu.com/s/1eSMSLN0 Password: 8os4Installing the XFTP software in the Windows7 system,Centos7 Turn off VSFTPD service #systemctl stop vsftpdcentos7 View Port #netstat-lntpIn the CENTOS7 system, press Ctrl+alt+f to eject the following File Transfer dialog box, and select the file to be dragged to the corresponding system to copy the transfer file.15.5 using PURE-FT

=600data_connection_timeout=120max_clients=10Create a user home directory, #mkdir/home/virftp/testuser1Create file, #touch/home/virftp/testuser1/aming,txtModify permissions, #chown-R virftp:virftp/home/virftpCustom password file path, #vim/etc/pam.d/vsftpdAuth sufficient/lib64/security/pam_userdb.so Db=/etc/vsftpd/vsftpd_loginAccount Sufficient/lib64/security/pam_userdb.so Db=/etc/vsftpd/vsftpd_loginEdit the configuration file, #vim/etc/vsftpd/vsftpd.confAnonymous_enable=noAnon_upload_enable=noA

spaces (n is any number) move n characters like rightctrl+f or PageUp The screen moves forward one pagectrl+b or PageDown The screen moves backward one pagenumber 0 or shift+6 (^) move to the beginning of the bankshift+4 ($) move to the end of our lineGG move to First lineG or Shift+g move to Tail lineNG (n is any number) move to Nth rowAt the bottom right, you'll be prompted where the cursor is at the first line, the charactergame familiar with vim move cursor: https://vim-adventures.com/

-X127.0.0.1:80 test.com/admin///prompt 401 user request12.9 Nginx Domain Redirectionvim/usr/local/nginx/conf/vhost/test.com.conf//Modify to the following content----------------------------------------------------------------Server{Listen 80;server_name test.com test1.com test2.com;Index index.html index.htm index.php;root/data/wwwroot/test.com;if ($host! = ' test.com ') {Rewrite ^/(. *) $ http://test.com/$1 permanent;}Location ~ admin.php{auth_basic "auth";AUTH_BASIC_USER_FILE/USR/LOCAL/NGINX/C