What are some examples of using async and await in Python 3?

What are some examples of using async and await in Python 3?

In Python 3, async and await are used to write asynchronous code. For example, you can define an async function like this:

import asyncio

async def fetch_data():
    await asyncio.sleep(1)  # Simulates a network call
    return 'Data fetched'

Can you show me how to run multiple async functions concurrently?

Sure! You can use asyncio.gather() to run multiple async functions concurrently. Here's an example:

async def main():
    results = await asyncio.gather(fetch_data(), fetch_data())
    print(results)

asyncio.run(main())

What happens if I forget to use await?

If you forget to use await, the async function will return a coroutine object instead of the result. You won't get the expected output.

Are there any common pitfalls when using async and await?

Yes, some common pitfalls include forgetting to await coroutines, mixing synchronous and asynchronous code, and not handling exceptions properly.