[NFC] polish applications/Chat/coati/trainer/strategies/base.py code style (#4278)

applications/Chat/coati/trainer/strategies/base.py

@@ -79,8 +79,7 @@ class Strategy(ABC):
                     model, optimizer = arg
                 except ValueError:
                     raise RuntimeError(f'Expect (model, optimizer) pair, got a tuple with size "{len(arg)}"')
-                model, optimizer, *_ = self.booster.boost(model=model,
-                                                          optimizer=optimizer)
+                model, optimizer, *_ = self.booster.boost(model=model, optimizer=optimizer)
                 rets.append((model, optimizer))
             elif isinstance(arg, Dict):
                 model, optimizer, criterion, dataloader, lr_scheduler = self.booster.boost(**arg)
@@ -90,10 +89,7 @@ class Strategy(ABC):
                                     dataloader=dataloader,
                                     lr_scheduler=lr_scheduler)
                 # remove None values
-                boost_result = {
-                    key: value
-                    for key, value in boost_result.items() if value is not None
-                }
+                boost_result = {key: value for key, value in boost_result.items() if value is not None}
                 rets.append(boost_result)
             else:
                 raise RuntimeError(f'Type {type(arg)} is not supported')
@@ -112,23 +108,13 @@ class Strategy(ABC):
         """
         return model
 
-    def save_model(self,
-                   model: nn.Module,
-                   path: str,
-                   only_rank0: bool = True,
-                   **kwargs
-                   ) -> None:
+    def save_model(self, model: nn.Module, path: str, only_rank0: bool = True, **kwargs) -> None:
         self.booster.save_model(model, path, shard=not only_rank0, **kwargs)
 
     def load_model(self, model: nn.Module, path: str, strict: bool = True) -> None:
         self.booster.load_model(model, path, strict)
 
-    def save_optimizer(self,
-                       optimizer: Optimizer,
-                       path: str,
-                       only_rank0: bool = False,
-                       **kwargs
-                       ) -> None:
+    def save_optimizer(self, optimizer: Optimizer, path: str, only_rank0: bool = False, **kwargs) -> None:
         self.booster.save_optimizer(optimizer, path, shard=not only_rank0, **kwargs)
 
     def load_optimizer(self, optimizer: Optimizer, path: str) -> None: