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| -rw-r--r-- | bot/resources/tags/blocking.md | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/bot/resources/tags/blocking.md b/bot/resources/tags/blocking.md index 5c9eeddc4..3b9334513 100644 --- a/bot/resources/tags/blocking.md +++ b/bot/resources/tags/blocking.md @@ -4,4 +4,25 @@ Imagine that you're coding a Discord bot and every time somebody uses a command, **What is asynchronous programming?** -An asynchronous program utilises the `async` and `await` keywords. An asynchronous program pauses what it's doing and does something else whilst it waits for some third-party service to complete whatever it's supposed to do. +An asynchronous program utilises the `async` and `await` keywords. An asynchronous program pauses what it's doing and does something else whilst it waits for some third-party service to complete whatever it's supposed to do. Any code within an `async` context manager or function marked with the `await` keyword indicates to Python, that whilst this operation is being completed, it can do something else. For example: + +```py +import discord + +# Bunch of bot code + +async def ping(ctx): + await ctx.send("Pong!") +``` + +**What does the term "blocking" mean?** + +A blocking operation is wherever you do something without `await`ing it. This tells Python that this step must be completed before it can do anything else. Common examples of blocking operations, as simple as they may seem, include: outputting text, adding two numbers and appending an item onto a list. Most common Python libraries have an asynchronous version available to use in asynchronous contexts. + +**`async` libraries** + +The standard async library - `asyncio` +Asynchronous web requests - `aiohttp` +Talking to PostgreSQL asynchronously - `asyncpg` +MongoDB interactions asynchronously - `motor` +Check out [this](https://github.com/timofurrer/awesome-asyncio) list for even more! |