> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# loop()

> Create a new event loop for running async nodriver code

## Overview

The `loop()` function creates and sets a new asyncio event loop. This is a convenience function for running nodriver's async functions in a synchronous context.

## Signature

```python theme={null}
def loop() -> asyncio.AbstractEventLoop
```

## Returns

<ResponseField name="event_loop" type="asyncio.AbstractEventLoop">
  A new asyncio event loop that you can use to run async functions.
</ResponseField>

## Examples

### Basic usage

```python theme={null}
import nodriver as uc

async def main():
    browser = await uc.start()
    tab = await browser.get('https://example.com')
    browser.stop()

if __name__ == '__main__':
    # Create event loop and run async function
    uc.loop().run_until_complete(main())
```

### Running multiple coroutines

```python theme={null}
import nodriver as uc
import asyncio

async def scrape_site(url):
    browser = await uc.start()
    tab = await browser.get(url)
    content = await tab.get_content()
    browser.stop()
    return content

async def main():
    urls = [
        'https://example.com',
        'https://example.org',
        'https://example.net'
    ]
    
    # Run multiple scraping tasks concurrently
    results = await asyncio.gather(
        *[scrape_site(url) for url in urls]
    )
    return results

if __name__ == '__main__':
    results = uc.loop().run_until_complete(main())
    print(results)
```

### Alternative: Using asyncio directly

You can also use Python's built-in `asyncio.run()` (Python 3.7+):

```python theme={null}
import nodriver as uc
import asyncio

async def main():
    browser = await uc.start()
    tab = await browser.get('https://example.com')
    browser.stop()

if __name__ == '__main__':
    # Alternative to uc.loop().run_until_complete()
    asyncio.run(main())
```

## Notes

<Note>
  The `loop()` function is a convenience wrapper around `asyncio.new_event_loop()` and `asyncio.set_event_loop()`.
</Note>

<Note>
  In Python 3.7+, you can use `asyncio.run()` instead of `uc.loop().run_until_complete()` for simpler code.
</Note>

## See also

* [start()](/api/start) - Launch a browser instance
* [Python asyncio documentation](https://docs.python.org/3/library/asyncio.html) - Learn more about async programming