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centos installation Version Description: centos7, mysql5.7, not centos7, some commands may not be compatible Install MySQL server # Download and install mysql yum. wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm yum -y install mysql57-community-release-el7-10.noarch.rpm # Install MySQL server yum -y install m ...

Cause: the school canal cup reported a project to make a weather forecast device. I ran BME280 module with arduino, and realized two Arduino master-slave transmission with Bluetooth module. But in order to analyze, we need to extract data. So I wrote a PC program with python, realized the serial communication between arduiho and computer with p ...

Prospective readers Students preparing to use spring's data-redis-cache Understand the use of @CacheConfig, @Cacheable, @CachePut, @CacheEvict, @Caching Deeply Understanding the Realization Principle of data-redis-cache Description of article content How to use redis-cache Customize keyGenerator and expiration time Source code interpretation ...

pandas is a software package of Python language. When we use Python language for machine learning programming, it is a very common basic programming library. This article is an introduction to it. pandas provides a fast, flexible and expressive data structure, which aims to make the work of "relation" or "mark" data simple ...

PageOffice's storage mechanism is to save data first and then files, so clicking the Save button once can save both data and files at the same time. But there is a need to save files or data separately. The following is a demonstration of the implementation process. I. Core Code poCtrl.setSaveDataPage("SaveData.jsp");//Set up the page to save ...

Demand: Excel files need to be parsed, uploaded to a table in the database and downloaded. Technology: ElementUI for front-end vue, spring boot for back-end, mybatis Achieving results:   Upload implementation: 1) Field type selection The field type used to store files in the database is BLO ...

Recent use of Go to import data from Excel into the server is for http requests But there is a problem that new Goroutine will be added indefinitely after reading from the file. Causes all cards to be stuck in the initialization request and then gets stuck. Problem simulation Simulation code func main() { pool := sync.WaitGroup{} for ...

I. Creating Sequences series can represent excel rows and columns How to create it: 1. Using dictionaries, key is converted to index and value is converted to data. 2. Use lists "Mode 1" s1=pd.Series()#Generate a sequence that represents rows and columns d={'x':100,'y':200,'z':300} s1=pd.Series(d)#Con ...

Links to the original text: https://www.jianshu.com/p/f13fb250369d I. Requirement Description Customers need to receive specific activity data every Monday, generate Excel or CSV files, and send them to designated recipients by mail. The p ...

scene Use NPOI to import Excel and assign it to the DataTable, then display it on the DataGrdView, add a check box, and get the contents of the selected row. Winform uses NPOI to import Excel and assign it to DataTable: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100064821 Effect   Realization On the basis of the succes ...