# tinker_cookbook.utils.deprecated

### [**tinker_cookbook.utils.deprecated**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/utils/deprecation.py#L140)(*\_func*, *message*, *removal_version*)

Decorator to mark a function or class as deprecated.

Can be used with or without arguments::

@deprecated def old(): ...

@deprecated(message="Use new_func instead.", removal_version="0.20.0") def old(): ...

When applied to a class, the warning is emitted at instantiation time.

**Parameters:**

- [**\_func**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/utils/deprecation.py#L141) (*Callable[..., Any] | None*)
- [**message**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/utils/deprecation.py#L143) (*str*)
- [**removal_version**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/utils/deprecation.py#L144) (*str | None*)

**Returns:** *Any*