> For the complete documentation index, see [llms.txt](https://docs.r.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.r.xyz/glider-ide/api/contract/contract.is_lib.md).

# Contract.is\_lib()

`is_lib() → bool`

## Example query

```python
from glider import *

def query():
  libs = Contracts().exec(10).filter(lambda x: x.is_lib())

  return libs
```

## Example output

<figure><img src="/files/mm2nfzEh10LC243OcVZI" alt=""><figcaption></figcaption></figure>