`async`

In Python, the async keyword lets you define asynchronous functions, loops, context managers, generators, and iterators. All these objects allow you to write code that performs non-blocking operations, which is particularly useful for I/O-bound and high-level structured network code.

Python `async` Keyword Examples

Here’s a simple example demonstrating how to use the async keyword:

import asyncio

async def greet():
    print("Hello")
    await asyncio.sleep(1)
    print("World!")

asyncio.run(greet())

In this example, greet() is an asynchronous function that you define with the async keyword. Inside this function, the await keyword waits one second using asyncio.sleep(1). Other asynchronous tasks can run during the waiting period, which is the base of the non-blocking behavior.

Python `async` Keyword Use Cases

Writing asynchronous functions that can be paused and resumed
Managing I/O-bound tasks like network requests, file operations, or database queries
Improving the performance of programs by allowing other tasks to run while waiting for an operation to complete