Fixes 'Tokenizer does not have padding token' introduced by #1444 for…

… Llama3.1 (#1457)

examples/language-modeling/run_lora_clm.py

@@ -700,6 +700,11 @@ def main():
         raise ValueError("Must provide model_name_or_path to load a pretrained CausalLM model.")
 
     if model.config.model_type == "llama":
+        if model.generation_config.pad_token_id is None:
+            if isinstance(model.generation_config.eos_token_id, int):
+                model.generation_config.pad_token_id = model.generation_config.eos_token_id
+            elif isinstance(model.generation_config.eos_token_id, list):
+                model.generation_config.pad_token_id = model.generation_config.eos_token_id[0]
         if model_args.attn_softmax_bf16:
             model.generation_config.attn_softmax_bf16 = True
         if model_args.use_flash_attention:
@@ -717,7 +722,10 @@ def main():
     if hasattr(model.generation_config, "pad_token_id") and model.generation_config.pad_token_id is not None:
         tokenizer.pad_token_id = model.generation_config.pad_token_id
     if hasattr(model.generation_config, "eos_token_id") and model.generation_config.eos_token_id is not None:
-        tokenizer.eos_token_id = model.generation_config.eos_token_id
+        if isinstance(model.generation_config.eos_token_id, int):
+            tokenizer.eos_token_id = model.generation_config.eos_token_id
+        elif isinstance(model.generation_config.eos_token_id, list):
+            tokenizer.eos_token_id = model.generation_config.eos_token_id[0]
     if hasattr(model.generation_config, "bos_token_id") and model.generation_config.bos_token_id is not None:
         tokenizer.bos_token_id = model.generation_config.bos_token_id