diff --git a/libs/langchain/langchain/agents/agent.py b/libs/langchain/langchain/agents/agent.py
index 7f2c708eadf..129e443c4d3 100644
--- a/libs/langchain/langchain/agents/agent.py
+++ b/libs/langchain/langchain/agents/agent.py
@@ -449,7 +449,7 @@ class RunnableAgent(BaseSingleActionAgent):
         Returns:
             Action specifying what tool to use.
         """
-        inputs = {**kwargs, **{"intermediate_steps": intermediate_steps}}
+        inputs = {**kwargs, "intermediate_steps": intermediate_steps}
         final_output: Any = None
         if self.stream_runnable:
             # Use streaming to make sure that the underlying LLM is invoked in a
@@ -488,7 +488,7 @@ class RunnableAgent(BaseSingleActionAgent):
         Returns:
             Action specifying what tool to use.
         """
-        inputs = {**kwargs, **{"intermediate_steps": intermediate_steps}}
+        inputs = {**kwargs, "intermediate_steps": intermediate_steps}
         final_output: Any = None
         if self.stream_runnable:
             # Use streaming to make sure that the underlying LLM is invoked in a
@@ -565,7 +565,7 @@ class RunnableMultiActionAgent(BaseMultiActionAgent):
         Returns:
             Action specifying what tool to use.
         """
-        inputs = {**kwargs, **{"intermediate_steps": intermediate_steps}}
+        inputs = {**kwargs, "intermediate_steps": intermediate_steps}
         final_output: Any = None
         if self.stream_runnable:
             # Use streaming to make sure that the underlying LLM is invoked in a
@@ -604,7 +604,7 @@ class RunnableMultiActionAgent(BaseMultiActionAgent):
         Returns:
             Action specifying what tool to use.
         """
-        inputs = {**kwargs, **{"intermediate_steps": intermediate_steps}}
+        inputs = {**kwargs, "intermediate_steps": intermediate_steps}
         final_output: Any = None
         if self.stream_runnable:
             # Use streaming to make sure that the underlying LLM is invoked in a
@@ -907,8 +907,6 @@ class Agent(BaseSingleActionAgent):
             tools: Tools to use.
         """
 
-        pass
-
     @classmethod
     @abstractmethod
     def _get_default_output_parser(cls, **kwargs: Any) -> AgentOutputParser:
diff --git a/libs/langchain/langchain/chains/combine_documents/map_reduce.py b/libs/langchain/langchain/chains/combine_documents/map_reduce.py
index 42be28cc63a..166d5624f2e 100644
--- a/libs/langchain/langchain/chains/combine_documents/map_reduce.py
+++ b/libs/langchain/langchain/chains/combine_documents/map_reduce.py
@@ -270,7 +270,7 @@ class MapReduceDocumentsChain(BaseCombineDocumentsChain):
         """
         map_results = await self.llm_chain.aapply(
             # FYI - this is parallelized and so it is fast.
-            [{**{self.document_variable_name: d.page_content}, **kwargs} for d in docs],
+            [{self.document_variable_name: d.page_content, **kwargs} for d in docs],
             callbacks=callbacks,
         )
         question_result_key = self.llm_chain.output_key
diff --git a/libs/langchain/langchain/chains/combine_documents/map_rerank.py b/libs/langchain/langchain/chains/combine_documents/map_rerank.py
index 7cd90f87a68..8692f1ff99c 100644
--- a/libs/langchain/langchain/chains/combine_documents/map_rerank.py
+++ b/libs/langchain/langchain/chains/combine_documents/map_rerank.py
@@ -182,7 +182,7 @@ class MapRerankDocumentsChain(BaseCombineDocumentsChain):
         """
         results = self.llm_chain.apply_and_parse(
             # FYI - this is parallelized and so it is fast.
-            [{**{self.document_variable_name: d.page_content}, **kwargs} for d in docs],
+            [{self.document_variable_name: d.page_content, **kwargs} for d in docs],
             callbacks=callbacks,
         )
         return self._process_results(docs, results)
@@ -206,7 +206,7 @@ class MapRerankDocumentsChain(BaseCombineDocumentsChain):
         """
         results = await self.llm_chain.aapply_and_parse(
             # FYI - this is parallelized and so it is fast.
-            [{**{self.document_variable_name: d.page_content}, **kwargs} for d in docs],
+            [{self.document_variable_name: d.page_content, **kwargs} for d in docs],
             callbacks=callbacks,
         )
         return self._process_results(docs, results)
diff --git a/libs/langchain/langchain/memory/entity.py b/libs/langchain/langchain/memory/entity.py
index 982be3645c7..632c1714740 100644
--- a/libs/langchain/langchain/memory/entity.py
+++ b/libs/langchain/langchain/memory/entity.py
@@ -40,27 +40,22 @@ class BaseEntityStore(BaseModel, ABC):
     @abstractmethod
     def get(self, key: str, default: Optional[str] = None) -> Optional[str]:
         """Get entity value from store."""
-        pass
 
     @abstractmethod
     def set(self, key: str, value: Optional[str]) -> None:
         """Set entity value in store."""
-        pass
 
     @abstractmethod
     def delete(self, key: str) -> None:
         """Delete entity value from store."""
-        pass
 
     @abstractmethod
     def exists(self, key: str) -> bool:
         """Check if entity exists in store."""
-        pass
 
     @abstractmethod
     def clear(self) -> None:
         """Delete all entities from store."""
-        pass
 
 
 @deprecated(
diff --git a/libs/langchain/langchain/memory/readonly.py b/libs/langchain/langchain/memory/readonly.py
index 0e03c924a50..48e23d08faa 100644
--- a/libs/langchain/langchain/memory/readonly.py
+++ b/libs/langchain/langchain/memory/readonly.py
@@ -19,8 +19,6 @@ class ReadOnlySharedMemory(BaseMemory):
 
     def save_context(self, inputs: dict[str, Any], outputs: dict[str, str]) -> None:
         """Nothing should be saved or changed"""
-        pass
 
     def clear(self) -> None:
         """Nothing to clear, got a memory like a vault."""
-        pass
diff --git a/libs/langchain/langchain/memory/simple.py b/libs/langchain/langchain/memory/simple.py
index c6da1f89795..5524cabfec9 100644
--- a/libs/langchain/langchain/memory/simple.py
+++ b/libs/langchain/langchain/memory/simple.py
@@ -19,8 +19,6 @@ class SimpleMemory(BaseMemory):
 
     def save_context(self, inputs: dict[str, Any], outputs: dict[str, str]) -> None:
         """Nothing should be saved or changed, my memory is set in stone."""
-        pass
 
     def clear(self) -> None:
         """Nothing to clear, got a memory like a vault."""
-        pass
diff --git a/libs/langchain/langchain/smith/evaluation/runner_utils.py b/libs/langchain/langchain/smith/evaluation/runner_utils.py
index 5c7f6084462..c86b41f5121 100644
--- a/libs/langchain/langchain/smith/evaluation/runner_utils.py
+++ b/libs/langchain/langchain/smith/evaluation/runner_utils.py
@@ -98,10 +98,8 @@ class TestResult(dict):
         to_drop = [
             col
             for col in df.columns
-            if col.startswith("inputs.")
-            or col.startswith("outputs.")
+            if col.startswith(("inputs.", "outputs.", "reference"))
             or col in {"input", "output"}
-            or col.startswith("reference")
         ]
         return df.describe(include="all").drop(to_drop, axis=1)
 
diff --git a/libs/langchain/pyproject.toml b/libs/langchain/pyproject.toml
index ef475d0840a..39dea93142a 100644
--- a/libs/langchain/pyproject.toml
+++ b/libs/langchain/pyproject.toml
@@ -143,7 +143,7 @@ ignore-regex = ".*(Stati Uniti|Tense=Pres).*"
 ignore-words-list = "momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogyny,unsecure,damon,crate,aadd,symbl,precesses,accademia,nin"
 
 [tool.ruff.lint]
-select = ["E", "F", "I", "PGH003", "T201", "D", "UP", "S", "W"]
+select = ["E", "F", "I", "PGH003", "PIE", "T201", "D", "UP", "S", "W"]
 pydocstyle.convention = "google"
 pyupgrade.keep-runtime-typing = true
 
diff --git a/libs/langchain/tests/integration_tests/test_compile.py b/libs/langchain/tests/integration_tests/test_compile.py
index 33ecccdfa0f..f315e45f521 100644
--- a/libs/langchain/tests/integration_tests/test_compile.py
+++ b/libs/langchain/tests/integration_tests/test_compile.py
@@ -4,4 +4,3 @@ import pytest
 @pytest.mark.compile
 def test_placeholder() -> None:
     """Used for compiling integration tests without running any real tests."""
-    pass