ruff: add bugbear across packages (#31917)

WIP, other packages will get in next PRs

libs/partners/huggingface/langchain_huggingface/embeddings/huggingface_endpoint.py

@@ -98,12 +98,12 @@ class HuggingFaceEndpointEmbeddings(BaseModel, Embeddings):
             self.client = client
             self.async_client = async_client
 
-        except ImportError:
+        except ImportError as e:
             msg = (
                 "Could not import huggingface_hub python package. "
                 "Please install it with `pip install huggingface_hub`."
             )
-            raise ImportError(msg)
+            raise ImportError(msg) from e
         return self
 
     def embed_documents(self, texts: list[str]) -> list[list[float]]:

libs/partners/huggingface/langchain_huggingface/llms/huggingface_pipeline.py

@@ -115,12 +115,12 @@ class HuggingFacePipeline(BaseLLM):
             )
             from transformers import pipeline as hf_pipeline  # type: ignore[import]
 
-        except ImportError:
+        except ImportError as e:
             msg = (
                 "Could not import transformers python package. "
                 "Please install it with `pip install transformers`."
             )
-            raise ValueError(msg)
+            raise ValueError(msg) from e
 
         _model_kwargs = model_kwargs.copy() if model_kwargs else {}
         if device_map is not None: