Missing DropPath Import in pixart_relactrl_v1.py

[eightgirls]

In diffusion/model/nets/pixart_relactrl_v1.py, the code uses DropPath class but doesn't import it directly. The class is referenced in the RGLC_Block constructor but there's no corresponding import statement.

Steps to Reproduce

Check the code at line ~100 in diffusion/model/nets/pixart_relactrl_v1.py:

self.drop_path = DropPath(drop_path) if drop_path > 0. else nn.Identity()

Proposed Solution

Add the following import to the top of the file:

from timm.models.layers import DropPath

This is consistent with other model files in the repository that properly import this class.

Nice works!