chore: upgrade transformers 4.55.0 (#8823)

Co-authored-by: hebiao064 <hebiaobuaa@gmail.com>

python/pyproject.toml

@@ -45,7 +45,7 @@ runtime_common = [
     "soundfile==0.13.1",
     "scipy",
     "torchao==0.9.0",
-    "transformers==4.54.1",
+    "transformers==4.55.0",
     "timm==1.0.16",
     "uvicorn",
     "uvloop",

python/sglang/srt/models/transformers.py

@@ -219,7 +219,7 @@ class TransformersForCausalLM(nn.Module):
                 f"{type(self.model)} does not support tensor parallel yet!"
             )
 
-        tp_plan = self.model._tp_plan
+        tp_plan = getattr(self.model.config, "base_model_tp_plan", None) or {}
 
         def _tensor_parallel(module: nn.Module, prefix: str = ""):
             for child_name, child_module in module.named_children():