Add type hints for several pytorch models (batch-4) (#25749)

* Add type hints for MGP STR model

* Add missing type hints for plbart model

* Add type hints for Pix2struct model

* Add missing type hints to Rag model and tweak the docstring

* Add missing type hints to Sam model

* Add missing type hints to Swin2sr model

* Fix a type hint for Pix2StructTextModel
Co-authored-by: Matt <Rocketknight1@users.noreply.github.com>

* Fix typo on Rag model docstring
Co-authored-by: Matt <Rocketknight1@users.noreply.github.com>

* Fix linter

---------
Co-authored-by: Matt <Rocketknight1@users.noreply.github.com>

src/transformers/models/mgp_str/modeling_mgp_str.py

@@ -380,7 +380,13 @@ class MgpstrModel(MgpstrPreTrainedModel):
         return self.embeddings.proj
 
     @add_start_docstrings_to_model_forward(MGP_STR_INPUTS_DOCSTRING)
-    def forward(self, pixel_values, output_attentions=None, output_hidden_states=None, return_dict=None):
+    def forward(
+        self,
+        pixel_values: torch.FloatTensor,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.FloatTensor], BaseModelOutput]:
         output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
         output_hidden_states = (
             output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
@@ -437,12 +443,12 @@ class MgpstrForSceneTextRecognition(MgpstrPreTrainedModel):
     @replace_return_docstrings(output_type=MgpstrModelOutput, config_class=MgpstrConfig)
     def forward(
         self,
-        pixel_values,
-        output_attentions=None,
-        output_a3_attentions=None,
-        output_hidden_states=None,
-        return_dict=None,
-    ):
+        pixel_values: torch.FloatTensor,
+        output_attentions: Optional[bool] = None,
+        output_a3_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple[torch.FloatTensor], MgpstrModelOutput]:
         r"""
         output_a3_attentions (`bool`, *optional*):
             Whether or not to return the attentions tensors of a3 modules. See `a3_attentions` under returned tensors

src/transformers/models/pix2struct/modeling_pix2struct.py

@@ -1387,21 +1387,21 @@ class Pix2StructTextModel(Pix2StructPreTrainedModel):
     @replace_return_docstrings(output_type=CausalLMOutputWithCrossAttentions, config_class=_CONFIG_FOR_DOC)
     def forward(
         self,
-        input_ids=None,
-        attention_mask=None,
-        encoder_hidden_states=None,
-        encoder_attention_mask=None,
-        inputs_embeds=None,
-        head_mask=None,
-        cross_attn_head_mask=None,
-        past_key_values=None,
-        use_cache=None,
-        output_attentions=None,
-        output_hidden_states=None,
-        labels=None,
-        return_dict=None,
+        input_ids: Optional[torch.LongTensor] = None,
+        attention_mask: Optional[torch.FloatTensor] = None,
+        encoder_hidden_states: Optional[torch.FloatTensor] = None,
+        encoder_attention_mask: Optional[torch.FloatTensor] = None,
+        inputs_embeds: Optional[torch.LongTensor] = None,
+        head_mask: Optional[torch.FloatTensor] = None,
+        cross_attn_head_mask: Optional[torch.Tensor] = None,
+        past_key_values: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        labels: Optional[torch.LongTensor] = None,
+        return_dict: Optional[bool] = None,
         **kwargs,
-    ):
+    ) -> Union[Tuple[torch.FloatTensor, ...], CausalLMOutputWithCrossAttentions]:
         r"""
         Returns:
 

src/transformers/models/plbart/modeling_plbart.py

@@ -1177,7 +1177,7 @@ class PLBartModel(PLBartPreTrainedModel):
         encoder_outputs: Optional[List[torch.FloatTensor]] = None,
         past_key_values: Optional[List[torch.FloatTensor]] = None,
         inputs_embeds: Optional[torch.FloatTensor] = None,
-        decoder_inputs_embeds=None,
+        decoder_inputs_embeds: Optional[torch.FloatTensor] = None,
         use_cache: Optional[bool] = None,
         output_attentions: Optional[bool] = None,
         output_hidden_states: Optional[bool] = None,
@@ -1302,7 +1302,7 @@ class PLBartForConditionalGeneration(PLBartPreTrainedModel):
         encoder_outputs: Optional[List[torch.FloatTensor]] = None,
         past_key_values: Optional[List[torch.FloatTensor]] = None,
         inputs_embeds: Optional[torch.FloatTensor] = None,
-        decoder_inputs_embeds=None,
+        decoder_inputs_embeds: Optional[torch.FloatTensor] = None,
         labels: Optional[torch.Tensor] = None,
         use_cache: Optional[bool] = None,
         output_attentions: Optional[bool] = None,

src/transformers/models/rag/modeling_rag.py

@@ -462,16 +462,12 @@ RAG_FORWARD_INPUTS_DOCSTRING = r"""
             `question_encoder_last_hidden_state` and `retrieved_doc_embeds`, see examples for more information.
         context_input_ids (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*, returned when *output_retrieved=True*):
             Input IDs post-processed from the retrieved documents and the question encoder `input_ids` by the
-            retriever.
-
-            If the model has is not initialized with a `retriever` ``context_input_ids` has to be provided to the
-            forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`]. context_attention_mask
-            (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`, *optional*,
-            returned when *output_retrieved=True*): Attention mask post-processed from the retrieved documents and the
-            question encoder `input_ids` by the retriever.
-
-            If the model has is not initialized with a `retriever` `context_attention_mask` has to be provided to the
-            forward pass. `context_attention_mask` are returned by [`~RagRetriever.__call__`].
+            retriever. If the model was not initialized with a `retriever` ``context_input_ids` has to be provided to
+            the forward pass. `context_input_ids` are returned by [`~RagRetriever.__call__`].
+        context_attention_mask (`torch.LongTensor` of shape `(batch_size * config.n_docs, config.max_combined_length)`,*optional*, returned when *output_retrieved=True*):
+            Attention mask post-processed from the retrieved documents and the question encoder `input_ids` by the
+            retriever. If the model has is not initialized with a `retriever` `context_attention_mask` has to be
+            provided to the forward pass. `context_attention_mask` are returned by [`~RagRetriever.__call__`].
         use_cache (`bool`, *optional*, defaults to `True`):
             If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
             `past_key_values`).
@@ -545,7 +541,7 @@ class RagModel(RagPreTrainedModel):
         past_key_values: Optional[Tuple[Tuple[torch.FloatTensor]]] = None,
         doc_scores: Optional[torch.FloatTensor] = None,
         context_input_ids: Optional[torch.LongTensor] = None,
-        context_attention_mask=None,
+        context_attention_mask: Optional[torch.LongTensor] = None,
         use_cache: Optional[bool] = None,
         output_attentions: Optional[bool] = None,
         output_hidden_states: Optional[bool] = None,

src/transformers/models/sam/modeling_sam.py

@@ -1296,7 +1296,7 @@ class SamModel(SamPreTrainedModel):
         target_embedding: Optional[torch.FloatTensor] = None,
         output_attentions: Optional[bool] = None,
         output_hidden_states: Optional[bool] = None,
-        return_dict=None,
+        return_dict: Optional[bool] = None,
         **kwargs,
     ) -> List[Dict[str, torch.Tensor]]:
         r"""

src/transformers/models/swin2sr/modeling_swin2sr.py

@@ -903,7 +903,7 @@ class Swin2SRModel(Swin2SRPreTrainedModel):
     )
     def forward(
         self,
-        pixel_values,
+        pixel_values: torch.FloatTensor,
         head_mask: Optional[torch.FloatTensor] = None,
         output_attentions: Optional[bool] = None,
         output_hidden_states: Optional[bool] = None,