Cannot import torch.fx, `merge_dict` is a simple function

The error message suggests that there is an issue with importing the `torch.fx` module. It may be possible that the module is not installed or not available in the current environment.

To resolve this issue, you can try installing the `torch.fx` module by running the following command in your terminal or command prompt:

pip install torch.fx

If the module is already installed, you can try upgrading it by running:

pip install torch.fx --upgrade

If the issue persists, it may be helpful to provide more context or code snippets to better understand the problem.