What is the `asyncio` event loop?

Question

Accepted Answer

**Event loop** — manages and runs asynchronous tasks.

```python
import asyncio

async def fetch_data(name, delay):
    print(f"Starting {name}")
    await asyncio.sleep(delay)
    print(f"Finished {name}")
    return f"{name} result"

async def main():
    # Run concurrently
    results = await asyncio.gather(
        fetch_data("A", 2),
        fetch_data("B", 1),
        fetch_data("C", 3),
    )
    print(results)  # ["A result", "B result", "C result"]

# Create tasks for concurrent execution
    tasks = [
        asyncio.create_task(fetch_data(f"Task-{i}", i))
        for i in range(5)
    ]
    results = await asyncio.gather(*tasks)

# Queue for producer-consumer
    queue = asyncio.Queue()
    await queue.put("item")
    item = await queue.get()

asyncio.run(main())
```

**Key concepts:**
- Single-threaded concurrency.
- Cooperative multitasking (await yields control).
- Best for I/O-bound work.

Python: What is the `asyncio` event loop?