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Software and hardware environment Windows 10 64bit Anaconda3 with python 3.8 PyQt5 5.15 Introduction In actual projects, multi-window is a very common operation. This article will take a look at the implementation of multi-window in PyQt5 . example We make two windows, there is a button in the main window, and the second window pops […]

environment windows 10 64bit python 3.8.15 pynecone 0.1.14 Introduction Pynecone is an open source framework based on pure python for developing web app . It depends on nodejs , but it does not need to write additional front-end code, which is very friendly to friends who have not touched the front-end. Install The first step

environment ubuntu 18.04 64bit curl 7.87.0 arm -linux-gnueabihf Practical Go to the official website to download the latest compressed package version 7.87.0, https://curl.se/download.html , and then unzip it tar xvf curl-7.87.0.tar.gz cd curl-7.87.0 Next, prepare the cross-compilation tool chain, which is generally provided by the solution manufacturer. For example, I use /usr/local/linaro/gcc- arm -8.3-2019.03-x86_64- arm

environment ubuntu 18.04 64bit g c c 7.5.0 Introduction undefined reference to is a classic problem in c/c++ programming, and it is often encountered in actual project development. This article uses some examples to see how similar problems are solved. Preparation Prepare 3 files here, the project entry file main.c , the called function is

environment windows 10 64bit variable Variables in Rust are immutable by default, which is different from variables in mainstream programming languages ​​currently on the market. However, variables can be made mutable by prefixing the variable name with the keyword mut . let total = 100; total = 200; You can see the prompt cannot assign

environment windows 10 64bit foreword We have installed the Rust development environment before. During this process, cargo is also installed, which can be checked by cargo –version cargo is a built-in build tool and package manager in the Rust toolchain. It can help us build code, download, compile and manage dependency libraries. It is also

Software and hardware environment Windows 10 64bit Anaconda3 with python 3.8 PyQt5 5.15 Introduction To display a large picture in a small window, sometimes you need to view the details of the picture, and at this time you need to zoom in on the picture. This requirement is very common in map applications. This article

surroundings windows 10 64bit anaconda3 with python 3.8.11 flask 2.2.2 foreword json is the most common method of data transmission between modules, and flask can also easily receive and return data in json format. Practical To see the complete server code, use the flask .request method in get_json here from flask import Flask, jsonify, request

Software and hardware environment Windows 10 64bit Anaconda3 with python 3.8 PyQt5 5.15 Introduction By default, when a large amount of text is displayed on a label , the part that cannot be displayed is truncated. At this time, what naturally comes to mind is how to make the text display appear in the form

surroundings windows 10 64bit streamlit 1.13.0 streamlit -webrtc 0.43.4 Introduction The previous article introduced Streamlit , an open source library that can quickly create web applications, but streamlit itself is not good at processing real-time audio and video. This article introduces streamlit ‘s extension library, streamlit-webrtc , which can help us easily process and transmit

Software and hardware environment Windows 10 64bit Anaconda3 with python 3.8 PyQt5 5.15 Introduction QComboBox is a drop-down list control that provides multiple options for users to choose, which is very common in practical applications. The commonly used methods of QCombobox are as follows method Function addItem() Add a drop down option addItems() Add multiple

surroundings windows 10 64bit mediapipe 0.8.11 Introduction This article introduces another open source project for background removal of pictures, videos and camera images. This project is based on the mediapipe machine learning framework and mainly encapsulates FaceDetection and SelfieSegmentation . In addition, it also provides examples like face detection and image sketching , which is

shutdown command is used to shut down the system and is equivalent to the halt command. Syntax format: shutdown [parameter] Common parameters Example # 立即关闭系统shutdown -h now # 立即重启系统shutdown -r now # 10分钟后关机，同时发送消息给登录用户shutdown +10 “马上关机啦，赶快保存资料，不然一天白忙啦！” # 设定系统关闭时间也就是定时关机，如20:30 shutdown -h 20:30 # 如果之前设定了定时关机，可以取消shutdown -c This article is reprinted from https://xugaoxiang.com/2022/10/11/linux-cmds-116-shutdown/ This site is for inclusion only,