How is asynchrony implemented in Python? Tell without deep details.

Asynchronous programming in Python is implemented using the keywords async and await, which allow writing non-blocking code that resembles synchronous style.

The main idea is to use an event loop that manages task execution and switches between tasks without blocking the thread.

For example, a function declared with async def returns a coroutine — an object that can be paused and resumed. await is used to wait for the result of another asynchronous operation, allowing other tasks to run in the meantime.

Example:

import asyncio

async def say_hello():
    print('Hello')
    await asyncio.sleep(1)  # simulate an asynchronous operation
    print('World')

asyncio.run(say_hello())

Here, asyncio.sleep is a non-blocking delay that allows other tasks to execute while waiting.

Thus, asynchronous programming in Python enables efficient handling of I/O operations and other long-running tasks without blocking the main thread.