# tensorplay.nn.modules.module.register_module_full_backward_pre_hook

Source: https://www.tensorplay.cn/docs/generated/tensorplay.nn.modules.module.register_module_full_backward_pre_hook.html

```python
tensorplay.nn.modules.module.register_module_full_backward_pre_hook(hook: Callable[[Module, tuple[Tensor, ...] | Tensor], None | tuple[Tensor, ...] | Tensor]) → RemovableHandle
```

Register a backward pre-hook common to all the modules.

> **Warning**
>
> This adds global state to the nn.module module and it is only intended for debugging/profiling purposes.

Hooks registered using this function behave in the same way as those
registered by tensorplay.nn.Module.register_full_backward_pre_hook().
Refer to its documentation for more details.

Hooks registered using this function will be called before hooks registered
using tensorplay.nn.Module.register_full_backward_pre_hook().

Returns:

a handle that can be used to remove the added hook by calling
handle.remove()

Return type:

tensorplay.utils.hooks.RemovableHandle