fix deepseek-vl template (#1057)

Author: Jintao-Huang

swift/llm/utils/preprocess.py

@@ -28,6 +28,11 @@ def __call__(self, dataset: HfDataset) -> HfDataset:
             dataset = dataset.remove_columns(['history'])
             if has_history:
                 dataset = dataset.add_column('history', history)
+        if 'system' in dataset.features:
+            system = dataset['system']
+            has_system = len([sys for sys in system if sys not in {None, ''}]) > 0
+            if not has_system:
+                dataset = dataset.remove_columns(['system'])
         return dataset
 
 

swift/llm/utils/template.py

@@ -1267,10 +1267,6 @@ def __init__(self):
 
     def encode(self, example: Dict[str, Any]) -> Tuple[Dict[str, Any], Dict[str, Any]]:
         example = example.copy()
-        images = example.pop('images', None)
-        assert images is None, ('Please read the best practices: https://github.com/modelscope/swift/blob/main/'
-                                'docs/source/Multi-Modal/deepseek-vl最佳实践.md')
-
         history = example.pop('history', None)
         if history is None:
             history = []