[misc] fix packing and eval plot (#7623)

src/llamafactory/extras/constants.py

@@ -14,7 +14,7 @@
 
 import os
 from collections import OrderedDict, defaultdict
-from enum import Enum
+from enum import Enum, unique
 from typing import Optional
 
 from peft.utils import SAFETENSORS_WEIGHTS_NAME as SAFE_ADAPTER_WEIGHTS_NAME
@@ -115,6 +115,19 @@ class DownloadSource(str, Enum):
     OPENMIND = "om"
 
 
+@unique
+class QuantizationMethod(str, Enum):
+    r"""Borrowed from `transformers.utils.quantization_config.QuantizationMethod`."""
+
+    BNB = "bnb"
+    GPTQ = "gptq"
+    AWQ = "awq"
+    AQLM = "aqlm"
+    QUANTO = "quanto"
+    EETQ = "eetq"
+    HQQ = "hqq"
+
+
 class RopeScaling(str, Enum):
     LINEAR = "linear"
     DYNAMIC = "dynamic"