Update 4.mdx

You forgot to write a return for this function.
huggingface · Jun 24, 2023 · 333d7fe · 333d7fe
1 parent 0018bb4
commit 333d7fe
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diff --git a/chapters/zh-CN/chapter7/4.mdx b/chapters/zh-CN/chapter7/4.mdx
@@ -225,6 +225,7 @@ def preprocess_function(examples):
     model_inputs = tokenizer(
         inputs, text_target=targets, max_length=max_length, truncation=True
     )
+    return model_inputs
 ```
 
 请注意，我们为输入和输出设置了相同的最大长度。由于我们处理的文本看起来很短，我们使用 128。