Python Async Patterns

Master asynchronous programming in Python using asyncio, async/await syntax, and concurrent execution patterns for I/O-bound and CPU-bound tasks.

Basic Async/Await

Core async syntax:

import asyncio

# Define async function with async def
async def fetch_data(url: str) -> str:
    print(f"Fetching {url}...")
    await asyncio.sleep(1)  # Simulate I/O operation
    return f"Data from {url}"

# Call async function