Instead of using square brackets to get dictionary values in Python, try this method

Dictionary is a good helper that can't be obtained in the period of enlightenment educationA dictionary is an unordered collection of terms and definitions, which means:·Each data point has an identifier (i.e. term) and a value (i.e. definition).·Terms must be unique in the dictionary and cannot be repeated.·Unlike the list ...

Added by tysonrileyreznor on Mon, 14 Feb 2022 04:50:54 +0200

Summary of three basic algorithms and development status of binocular stereo vision

Binocular stereo vision has always been the development hotspot and difficulty in the field of machine vision research. "Hot" is because binocular stereo vision has its broad application prospects, and with the continuous development of optics, computer science and other disciplines, binocular stereo technology will continue to progre ...

Added by erichar11 on Mon, 14 Feb 2022 04:50:05 +0200

OpenCV contour detection and clustering based on Python

brief introductionOpencv's "findContours" function is often used by computer vision engineers to detect objects. The existence of OpenCV makes us only need to write a few lines of code to detect the contour (object). However, the contours detected by opencv are usually scattered. For example, a feature rich image may have hundreds to ...

Added by gmcalp on Mon, 14 Feb 2022 04:47:56 +0200

Application of YOLOv5 in safety helmet wearing detection in construction site

1, YOLO v5 training your own dataset tutorial 1.1 create your own dataset profile 1.2 create a label file corresponding to each picture 1.3 document placement specification 1.4 clustering a priori box (optional) 1.5 choose a model you need 1.6 start training 1.7 see the results after training 2, Detect 3, Detect whether there are people in the ...

Added by zuzupus on Mon, 14 Feb 2022 04:41:01 +0200

pg_basebackup backup and recovery

1,pg_basebackup 1.1,pg_basebackup principle Official document: pg_basebackup (postgres.cn) 1) Create a checkpoint, open FPW (full page writes), and create a backup label (store checkpoint location, time and other information) 2) Establish a connection with the database through the stream replication protocol, and the WAL Sender process ...

Added by bguzel on Mon, 14 Feb 2022 03:52:09 +0200

PyTorch common code snippet collection

This paper is a collection of common code segments of PyTorch, covering five aspects: basic configuration, tensor processing, model definition and operation, data processing, model training and testing, and also gives several noteworthy Tips, which are very comprehensive.PyTorch's best information is official documents. This article is a common ...

Added by Lefu on Mon, 14 Feb 2022 03:48:00 +0200

WinForm application interface development practical tutorial - realize regular email sending & shutdown processing

When we collect specific data, it often takes a long time. Sometimes, because of some things, it is impossible to wait for the results in front of the computer for a long time, so the program needs to automatically send us e-mail and other notices after a period of time, and execute exit program or shutdown and other aftercare work to save reso ...

Added by magicrobotmonkey on Mon, 14 Feb 2022 03:41:26 +0200

Algorithmic strategy | trend arbitrage strategy of commodity statistical arbitrage

  Quantitative strategy development, high-quality community, trading idea sharing and other related contents "Know the game, break the game" Hello, I'm the Ukrainian swordsman. The last strategy of this month came. The small partners in the group mentioned whether they could write an arbitrage strategy before. OK, in this is ...

Added by mits on Mon, 14 Feb 2022 03:32:27 +0200

Intensive reading of Vue lit source code

vue-lit be based on lit-html + @vue/reactivity The template engine is implemented in only 70 lines of code Vue Composition API , used to develop web component s.summary<my-component></my-component> <script type="module"> import { defineComponent, reactive, html, onMounted, onUpdated, onUnmounted } ...

Added by ams53 on Mon, 14 Feb 2022 03:22:30 +0200

LeetCode game 280

📒 Blog home page: A professional who advocates learning technology 🍣 Today's article is "game 280 of LeetCode" 🍣 🍣 I hope you can finish reading this article patiently 🍣 🙏 Bloggers are also in the learning stage. If you find any problems, please let us know. Thank you very much 🙏 💗 At the same time, thank you very much for you ...

Added by Elle0000 on Mon, 14 Feb 2022 03:22:41 +0200