Programmer Group

PyMySQL installation Before using PyMySQL, we need to make sure PyMySQL is installed. PyMySQL download address: https://github.com/PyMySQL/PyMySQL. If it is not already installed, we can use the following command to install the latest version of PyMySQL: $ pip install PyMySQL If your system does not support the pip command ...

The creation operators in RxJs are the starting point of creating data flow. These operators can create a flow out of nothing or according to other data forms. The Observable constructor can directly create a data flow, such as: const $source=new Observable(observer=>{ observer.next(1); observer.next(2); observer.next(3); }) H ...

Reference resources https://blog.51cto.com/14157628/2473866?source=dra Before deploying Prometheus, due to the low configuration of the experimental environment, the original dashboard and Scope were deleted! Before you actually deploy Prometheus, you should understand the relationships and functions among the components of Prometheus: 1) ...

1, Environment deployment 1. Build docker environment yum -y install docker 2. Install docker compose curl -L https://github.com/docker/compose/releases/download/1.23.2/docker-compose-`uname -s`-`uname -m` -o /usr/bin/docker-compose chmod +x /usr/bin/docker-compose 3. Create project directory mkdir -p /data/jms cd /data/jms 4. Download the doc ...

Spring Framework brief introduction The Spring framework was created due to the complexity of software development Purpose: To solve the complexity of enterprise application development Functionality: Replace EJB with basic JavaBean and provide more enterprise application functionality Scope: Any Java application Advantage: Open Source Free F ...

As you can see from the title, wxapp-img-loader is a plug-in for pre-loading picture components of WeChat applet and has been applied in Jingdong Shopping Applet Edition.The following steps are used: 1. Copy the img-loader directory to your project 2. Add the following code to the WXML file of the page to introduce the compon ...

Material Science Raspberry pie A server with public IP One filed domain name (not required) Course Prepare corresponding procedures download Download address: https://github.com/fate/frp/releases ## Server side wget https://github.com/fatedier/frp/releases/download/v0.32.0/frp_0.32.0_linux_38 ...

I have a friend (this friend is not me). There is a small library in my friend's unit. There are many books in the library. Although each book is numbered in the corresponding area, after all, there is no library management system, so it will take some time to find it. In order to make it easier for you to find these books, my friend contacted ...

The previous blog blog mainly recorded some simple external interrupts and timer usage. At that time, we would only let the designated nixie tube display the same number. In this blog, we will record several ways to let different nixie tubes display different numbers (also called dynamic display). A ...

Preface Spring security adopts the form based authentication form by default, which is related to the forms such as login authorization and authentication from the user with session identification. At present, many applications are developed based on the restful API style of SpringBoot, which can not ...