[misc] upgrade format to py39 (#7256)

src/llamafactory/hparams/generating_args.py

@@ -13,16 +13,14 @@
 # limitations under the License.
 
 from dataclasses import asdict, dataclass, field
-from typing import Any, Dict, Optional
+from typing import Any, Optional
 
 from transformers import GenerationConfig
 
 
 @dataclass
 class GeneratingArguments:
-    r"""
-    Arguments pertaining to specify the decoding parameters.
-    """
+    r"""Arguments pertaining to specify the decoding parameters."""
 
     do_sample: bool = field(
         default=True,
@@ -35,7 +33,9 @@ class GeneratingArguments:
     top_p: float = field(
         default=0.7,
         metadata={
-            "help": "The smallest set of most probable tokens with probabilities that add up to top_p or higher are kept."
+            "help": (
+                "The smallest set of most probable tokens with probabilities that add up to top_p or higher are kept."
+            )
         },
     )
     top_k: int = field(
@@ -71,7 +71,7 @@ class GeneratingArguments:
         metadata={"help": "Whether or not to remove special tokens in the decoding."},
     )
 
-    def to_dict(self, obey_generation_config: bool = False) -> Dict[str, Any]:
+    def to_dict(self, obey_generation_config: bool = False) -> dict[str, Any]:
         args = asdict(self)
         if args.get("max_new_tokens", -1) > 0:
             args.pop("max_length", None)