Asynchronous code has increasingly become a mainstay of Python development. With asyncio becoming part of the standard library and many third party packages providing features compatible with it, this paradigm is not going away anytime soon.

Let's walk through how to use the aiohttp library to take advantage of this for making asynchronous HTTP requests, which is one of the most common use cases for non-blocking code.

What is non-blocking code?

You may hear terms like "asynchronous", "non-blocking" or "concurrent" and be a little confused as to what they all mean. According to this much more detailed tutorial, two of the primary properties are:

• Asynchronous routines are able to “pause” while waiting on their ultimate result to let other routines run in the meantime.
• Asynchronous code, through the mechanism above, facilitates concurrent execution. To put it differently, asynchronous code gives the look and feel of concurrency.

So asynchronous …

Les données dont vous avez besoin sont parfois disponibles en ligne, mais ne sont pas disponibles via une API REST dédiée.

Heureusement pour les développeurs JavaScript, il existe une variété d'outils disponibles dans Node.js pour le scraping et l'analyse des données directement à partir de sites web à exploiter dans vos projets et applications.

Parcourons quatre de ces bibliothèques pour voir comment elles fonctionnent et comment elles se comparent les unes aux autres !

Mais d’abord, assurez-vous que vous avez des versions à jour de Node.js (au moins 12.0.0) et de npm installées sur votre machine. Exécutez la commande suivante dans le répertoire où vous souhaitez placer votre code:

Pour certaines de ces applications, nous utiliserons la bibliothèque Got pour faire des requêtes HTTP. Installez-la dans le même répertoire, avec cette commande:

Essayons maintenant de trouver tous les liens vers des fichiers MIDI …

Internet offre une incroyable diversité d’informations destinées à la consommation humaine. Mais il est souvent difficile d'accéder à ces données par voie programmatique, si elles ne se présentent pas sous la forme d'une API REST dédiée. Grâce à des outils Python comme Beautiful Soup, vous pouvez récupérer, analyser des pages Web puis utiliser ces données dans vos projets.

Par exemple : Comment récupérer des données MIDI sur Internet pour entraîner un réseau neuronal avec Magenta qui sera capable de générer de la musique rétro Nintendo ?

Nous avons besoin pour cela d'un ensemble de musiques MIDI provenant d'anciens jeux Nintendo. Beautiful Soup nous permet d’obtenir ces données à partir des Video Game Music Archive.

Démarrage et installation des dépendances

Avant de continuer, assurez-vous d’avoir bien installé la mise à jour de Python 3 et de pip. Créez et activez un environnement virtuel avant d'installer toutes les dépendances. …

One thing Vim users love about their favorite text editor is it's seemingly endless extensibility. On top of configuring basic mappings, settings, and behaviors in your .vimrc, there are a ton of awesome plugins that extend Vim's functionality. As someone who has been using Vim as his primary editor for about 7 years now, I'm going to share some of the ones that I think are important for any Vim user.

Installing and Managing Plugins

Before moving onto the plugins I want to cover, let's talk about how to actually install and manage plugins in Vim. There are multiple ways to do this.

Native Package Support in Vim 8

As of the release of Vim 8, Vim now has built in support for packages, which you can use to install these plugins. In this post, I will be linking a GitHub repository for each plugin I talk about. …

If there's one thing Vim users love more than saving a few seconds per day on keystrokes, it's trading tips and tricks with others about their own setup. As someone who's been using Vim for 7 years now as his primary text editor, I'm going to do my part by sharing some neat things from my .vimrc that people have asked me about at conferences and hackathons in the past.

For each of these examples, I'll provide the code for you to copy/paste into your own .vimrc and try to explain what's going on. Take what you think works for you and leave the rest!

Crosshair style cursor highlighting

One thing that people ask me about often is the crosshair style cursor that I use in my configuration. All you need to do to make your cursor look like this:

...is add these lines to your .vimrc file (typically located …

HTTPリクエストはモダンなプログラミング言語におけるコアとなる機能であり、多くの開発者が新しい環境に慣れる際に学習する項目の1つです。Node.jsではもともとの言語にこの機能が備わっており、また開発者コミュニティでも多くのソリューションが開発されています。最も人気のあるものをいくつか見ていきましょう。

数年前、同じような記事をこちらで執筆しています。しかし、その後JavaScriptではaync/awaitを用いた非同期プログラミング手法が普及し主流となったため、ネットワークリクエストがこれまで以上に簡単になりました。このことに加え、HTTPライブラリとしてこれまで多くのNodeプロジェクトで利用されてきたRequestが非推奨となりました。まさにこのガイドを更新する良いタイミングです。

他の投稿と同様に、コード例ではNASAのAstronomy Picture of the Day API をJSON APIとして使用しています。

実際に試される場合は次に進む前に最新バージョンのNode.jsおよびnpmがインストールされていることをご確認ください。

HTTP - 標準ライブラリ

比較のためにPromiseとasync/awaitを使わない標準のHTTPモジュールを見てみましょう。このモジュールは、依存するパッケージやライブラリがないという利点がありますが、ほかのソリューションに比べて開発者フレンドリーとは言えません。

以下のコードは、NA …

From watching people play your favorite games, to seeing awesome things built with code, to cooking up a storm in the kitchen, you can find a huge variety of content being streamed live on Twitch.tv. A mainstay of many Twitch channels is having a bot to engage with viewers in chat to automate things such as tasks for moderators or sharing contextual information with newcomers. Chatbots can even control Pokemon games!

With Twilio Programmable Messaging, you can write code to send and receive text messages. This could be useful for streamers for something like notifying subscribed users of when they're doing something particularly cool on stream.

Let's walk through how to create a chatbot to send SMS notifications to users on your own channel with JavaScript using Node.js.

Taking care of dependencies

Before writing any code, you will need an up to date version of Node.js and …

A mainstay of many popular channels that stream on Twitch.tv is having a bot to engage with viewers in chat to automate things such as tasks for moderators or sharing contextual information with newcomers. OpenAI's API for their new GPT-3 model provides a very versatile, general-purpose “text in, text out” interface, making it applicable to virtually any language task.

Naturally, this seems like a match made in heaven. So let's walk through how to unleash the powers of GPT-3 with Twitch chat bots on your own channel using Node.js.

Taking care of dependencies

Before writing any code, you will need an up to date version of Node.js and npm installed.

Navigate to the directory where you want this code to live and run the following command in your terminal to create a package for this project:

The --yes argument runs through all of the prompts that you …

From watching people play your favorite games, to seeing awesome things built with code, to cooking up a storm in the kitchen, you can find a huge variety of content being streamed live on Twitch.tv. A mainstay of many Twitch channels is having a bot to engage with viewers in chat to automate things such as tasks for moderators or sharing contextual information with newcomers. Chat bots can even control Pokemon games!

Let's walk through how to unleash the powers of Twitch chat bots on your own channel with JavaScript using Node.js.

Taking care of dependencies

Before writing any code, you will need an up to date version of Node.js and npm installed.

Navigate to the directory where you want this code to live and run the following command in your terminal to create a package for this project:

The --yes argument runs through …