diff options
| -rw-r--r-- | bot/resources/tags/blocking.md | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/bot/resources/tags/blocking.md b/bot/resources/tags/blocking.md index 31d91294c..5554d7eba 100644 --- a/bot/resources/tags/blocking.md +++ b/bot/resources/tags/blocking.md @@ -1,9 +1,7 @@ **Why do we need asynchronous programming?** - Imagine that you're coding a Discord bot and every time somebody uses a command, you need to get some information from a database. But there's a catch: the database servers are acting up today and take a whole 10 seconds to respond. If you do **not** use asynchronous methods, your whole bot will stop running until it gets a response from the database. How do you fix this? Asynchronous programming. **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. 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 @@ -14,13 +12,10 @@ import discord 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` |