Learn how-to-use-async-await-python in Python with step-by-step examples.
Async and await are keywords in Python used to write asynchronous, non-blocking code. They allow you to define functions that can pause and resume their execution, making it easier to handle tasks like network requests, file I/O, or any operation that takes a significant amount of time.
Using async and await is useful because it allows your program to perform other operations while waiting for slow tasks to complete, rather than blocking the entire program. This leads to more efficient and responsive applications, especially when dealing with multiple I/O-bound operations.
Common use cases for async and await in Python include web scraping, making HTTP requests, handling real-time data streaming, or managing multiple concurrent database operations. These scenarios benefit greatly from asynchronous programming because they often involve waiting for external resources.
# Python code example
import asyncio
async def say_hello():
await asyncio.sleep(1)
print('Hello, world!')
async def main():
await say_hello()
asyncio.run(main())