Merge pull request #3011 from patrickvonplaten/add_models_special_tokens_to_specific_configs

Add models special tokens to its pretrained configs

src/transformers/configuration_gpt2.py

@@ -135,6 +135,8 @@ class GPT2Config(PretrainedConfig):
         summary_activation=None,
         summary_proj_to_labels=True,
         summary_first_dropout=0.1,
+        bos_token_id=50256,
+        eos_token_id=50256,
         **kwargs
     ):
         super().__init__(**kwargs)
@@ -156,6 +158,9 @@ class GPT2Config(PretrainedConfig):
         self.summary_first_dropout = summary_first_dropout
         self.summary_proj_to_labels = summary_proj_to_labels
 
+        self.bos_token_id = bos_token_id
+        self.eos_token_ids = [eos_token_id]
+
     @property
     def max_position_embeddings(self):
         return self.n_positions

src/transformers/configuration_transfo_xl.py

@@ -149,6 +149,7 @@ class TransfoXLConfig(PretrainedConfig):
         proj_init_std=0.01,
         init_std=0.02,
         layer_norm_epsilon=1e-5,
+        eos_token_id=0,
         **kwargs
     ):
         super().__init__(**kwargs)
@@ -186,6 +187,8 @@ class TransfoXLConfig(PretrainedConfig):
         self.init_std = init_std
         self.layer_norm_epsilon = layer_norm_epsilon
 
+        self.eos_token_ids = [eos_token_id]
+
     @property
     def max_position_embeddings(self):
         return self.tgt_len + self.ext_len + self.mem_len

src/transformers/configuration_xlm.py

@@ -194,6 +194,8 @@ class XLMConfig(PretrainedConfig):
         end_n_top=5,
         mask_token_id=0,
         lang_id=0,
+        bos_token_id=0,
+        pad_token_id=2,
         **kwargs
     ):
         """Constructs XLMConfig.
@@ -234,6 +236,9 @@ class XLMConfig(PretrainedConfig):
         if "n_words" in kwargs:
             self.n_words = kwargs["n_words"]
 
+        self.bos_token_id = bos_token_id
+        self.pad_token_id = pad_token_id
+
     @property
     def n_words(self):  # For backward compatibility
         return self.vocab_size

src/transformers/configuration_xlnet.py

@@ -155,6 +155,9 @@ class XLNetConfig(PretrainedConfig):
         summary_last_dropout=0.1,
         start_n_top=5,
         end_n_top=5,
+        bos_token_id=1,
+        pad_token_id=5,
+        eos_token_id=2,
         **kwargs
     ):
         """Constructs XLNetConfig.
@@ -188,6 +191,10 @@ class XLNetConfig(PretrainedConfig):
         self.start_n_top = start_n_top
         self.end_n_top = end_n_top
 
+        self.bos_token_id = bos_token_id
+        self.pad_token_id = pad_token_id
+        self.eos_token_ids = [eos_token_id]
+
     @property
     def max_position_embeddings(self):
         return -1

src/transformers/modeling_utils.py

@@ -677,7 +677,7 @@ class PreTrainedModel(nn.Module, ModuleUtilsMixin):
 
             tokenizer = AutoTokenizer.from_pretrained('distilgpt2')   # Initialize tokenizer
             model = AutoModelWithLMHead.from_pretrained('distilgpt2')    # Download model and configuration from S3 and cache.
-            outputs = model.generate(max_length=40, bos_token_id=tokenizer.bos_token_id, eos_token_ids=tokenizer.eos_token_id, do_sample=False)  # do greedy decoding
+            outputs = model.generate(max_length=40, do_sample=False)  # do greedy decoding
             print('Generated: {}'.format(tokenizer.decode(outputs[0], skip_special_tokens=True)))
 
             tokenizer = AutoTokenizer.from_pretrained('openai-gpt')   # Initialize tokenizer
@@ -692,7 +692,7 @@ class PreTrainedModel(nn.Module, ModuleUtilsMixin):
             model = AutoModelWithLMHead.from_pretrained('distilgpt2')    # Download model and configuration from S3 and cache.
             input_context = 'The dog'
             input_ids = torch.tensor(tokenizer.encode(input_context)).unsqueeze(0)  # encode input context
-            outputs = model.generate(input_ids=input_ids, max_length=40, temperature=0.7, bos_token_id=tokenizer.bos_token_id, pad_token_id=tokenizer.pad_token_id, eos_token_ids=tokenizer.eos_token_id, num_return_sequences=3)  # 3 generate sequences using by sampling
+            outputs = model.generate(input_ids=input_ids, max_length=40, temperature=0.7, num_return_sequences=3)  # 3 generate sequences using by sampling
             for i in range(3): #  3 output sequences were generated
                 print('Generated {}: {}'.format(i, tokenizer.decode(outputs[i], skip_special_tokens=True)))
 

tests/test_modeling_gpt2.py

@@ -339,14 +339,7 @@ class GPT2ModelTest(ModelTesterMixin, unittest.TestCase):
             self.assertIsNotNone(model)
 
 
-def prepare_generation_special_tokens():
-    return {"bos_token_id": 50256, "eos_token_id": 50256}
-
-
 class GPT2ModelLanguageGenerationTest(unittest.TestCase):
-
-    special_tokens = prepare_generation_special_tokens()
-
     @slow
     def test_lm_generate_gpt2(self):
         model = GPT2LMHeadModel.from_pretrained("gpt2")
@@ -375,11 +368,7 @@ class GPT2ModelLanguageGenerationTest(unittest.TestCase):
         ]  # The dog is cute too. It likes to rub on me and is good for me (the dog
         torch.manual_seed(0)
 
-        output_ids = model.generate(
-            input_ids,
-            bos_token_id=self.special_tokens["bos_token_id"],
-            eos_token_ids=self.special_tokens["eos_token_id"],
-        )
+        output_ids = model.generate(input_ids)
 
         self.assertListEqual(output_ids[0].tolist(), expected_output_ids)
 
@@ -410,11 +399,5 @@ class GPT2ModelLanguageGenerationTest(unittest.TestCase):
             2635,
         ]  # The president of the United States, and the president of the United Kingdom, have been in the White
 
-        output_ids = model.generate(
-            input_ids,
-            do_sample=False,
-            bos_token_id=self.special_tokens["bos_token_id"],
-            eos_token_ids=self.special_tokens["eos_token_id"],
-        )
-
+        output_ids = model.generate(input_ids, do_sample=False)
         self.assertListEqual(output_ids[0].tolist(), expected_output_ids)

tests/test_modeling_transfo_xl.py

@@ -214,14 +214,7 @@ class TransfoXLModelTest(ModelTesterMixin, unittest.TestCase):
             self.assertIsNotNone(model)
 
 
-def prepare_generation_special_tokens():
-    return {"eos_token_id": 0}
-
-
 class TransfoXLModelLanguageGenerationTest(unittest.TestCase):
-
-    special_tokens = prepare_generation_special_tokens()
-
     @slow
     def test_lm_generate_transfo_xl_wt103(self):
         model = TransfoXLLMHeadModel.from_pretrained("transfo-xl-wt103")
@@ -578,6 +571,5 @@ class TransfoXLModelLanguageGenerationTest(unittest.TestCase):
 
         torch.manual_seed(0)
 
-        output_ids = model.generate(input_ids, eos_token_ids=self.special_tokens["eos_token_id"], max_length=200)
-
+        output_ids = model.generate(input_ids, max_length=200)
         self.assertListEqual(output_ids[0].tolist(), expected_output_ids)

tests/test_modeling_xlm.py

@@ -399,14 +399,7 @@ class XLMModelTest(ModelTesterMixin, unittest.TestCase):
             self.assertIsNotNone(model)
 
 
-def prepare_generation_special_tokens():
-    return {"bos_token_id": 0, "pad_token_id": 2}
-
-
 class XLMModelLanguageGenerationTest(unittest.TestCase):
-
-    special_tokens = prepare_generation_special_tokens()
-
     @slow
     def test_lm_generate_xlm_mlm_en_2048(self):
         model = XLMWithLMHeadModel.from_pretrained("xlm-mlm-en-2048")
@@ -435,10 +428,6 @@ class XLMModelLanguageGenerationTest(unittest.TestCase):
         ]  # The dog is nothing is it!!!!!!!!!!!! TODO (PVP): this sentence (and others I tried) does not make much sense, there seems to be a problem with xlm language generation.
         torch.manual_seed(0)
 
-        output_ids = model.generate(
-            input_ids,
-            bos_token_id=self.special_tokens["bos_token_id"],
-            pad_token_id=self.special_tokens["pad_token_id"],
-        )
+        output_ids = model.generate(input_ids)
 
         self.assertListEqual(output_ids[0].tolist(), expected_output_ids)

tests/test_modeling_xlnet.py

@@ -513,14 +513,7 @@ class XLNetModelTest(ModelTesterMixin, unittest.TestCase):
             self.assertIsNotNone(model)
 
 
-def prepare_generation_special_tokens():
-    return {"bos_token_id": 1, "pad_token_id": 5, "eos_token_id": 2}
-
-
 class XLNetModelLanguageGenerationTest(unittest.TestCase):
-
-    special_tokens = prepare_generation_special_tokens()
-
     @slow
     def test_lm_generate_xlnet_base_cased(self):
         model = XLNetLMHeadModel.from_pretrained("xlnet-base-cased")
@@ -917,12 +910,6 @@ class XLNetModelLanguageGenerationTest(unittest.TestCase):
         #  Since, however, he has had difficulty walking with Maria
 
         torch.manual_seed(0)
-        output_ids = model.generate(
-            input_ids,
-            bos_token_id=self.special_tokens["bos_token_id"],
-            pad_token_id=self.special_tokens["pad_token_id"],
-            eos_token_ids=self.special_tokens["eos_token_id"],
-            max_length=200,
-        )
+        output_ids = model.generate(input_ids, max_length=200)
 
         self.assertListEqual(output_ids[0].tolist(), expected_output_ids)