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Sure, I'd be happy to provide a tutorial on Python async callbacks with code examples. Asynchronous programming in Python is often used to write concurrent and efficient code. Callbacks are functions that are passed as arguments to other functions, and they are executed after the completion of a certain operation. Asynchronous callbacks can be particularly useful in scenarios where you want to perform non-blocking operations.
Let's create a simple example using Python's asyncio module, which is a library for writing asynchronous code. In this example, we'll create a function that simulates an asynchronous operation (e.g., fetching data from a remote server), and we'll use a callback to handle the result.
In this example, we define an async function fetch_data that simulates an asynchronous operation using asyncio.sleep. The main function is also marked as async, and it calls fetch_data with await. After the completion of the asynchronous operation, the callback function is called with the result.
When you run this script, you'll see the following output:
Here, the fetch_data function starts the asynchronous operation, and the event loop allows other tasks to run concurrently. When the operation completes after 2 seconds, the callback function is called with the result.
This is a basic example, and in a real-world scenario, you might use async callbacks with more complex asynchronous operations, such as making HTTP requests or interacting with databases. Async callbacks can help you write more responsive and efficient code by allowing other tasks to run while waiting for asynchronous operations to complete.
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