Fix gemlite import (#2553)

python/sglang/srt/layers/torchao_utils.py

@@ -2,8 +2,14 @@
 Common utilities for torchao.
 """
 
+import logging
+import os
+import pwd
+
 import torch
 
+logger = logging.getLogger(__name__)
+
 
 def apply_torchao_config_to_model(
     model: torch.nn.Module, torchao_config: str, filter_fn=None
@@ -50,27 +56,17 @@ def apply_torchao_config_to_model(
     elif "gemlite" in torchao_config:
         # gemlite-<packing_bitwidth>-<bit_width>-<group_size> or
         # gemlite-<bit_width>-<group_size> (packing_bitwidth defaults to 32)
-        import os
-        import pwd
-
-        import gemlite
-        from gemlite.core import GemLiteLinearTriton, set_autotune
-
-        try:
-            from torchao.quantization import gemlite_uintx_weight_only
-        except:
-            print(
-                f"import `gemlite_uintx_weight_only` failed, please use torchao nightly to use gemlite quantization"
-            )
-            return model
+        from gemlite.core import GemLiteLinearTriton
+        from torchao.quantization import gemlite_uintx_weight_only
 
         _quant_args = torchao_config.split("-")
         bit_width = int(_quant_args[-2])
         group_size = None if _quant_args[-1] == "None" else int(_quant_args[-1])
+
         try:
             packing_bitwidth = int(_quant_args[-3])
-        except:
-            # if only 2 inputs found, use default value
+        except (ValueError, IndexError):
+            # if only 2 inputs found or conversion fails, use default value
             packing_bitwidth = 32
 
         quantize_(