Clean warnings: replace type with isinstance and fix syntax (#11219)

Clean warnings: replace type with `isinstance` and fix on notebook
syntax syntax

docs/extras/modules/agents/how_to/handle_parsing_errors.ipynb

@@ -30,7 +30,6 @@
     "from langchain.utilities import SerpAPIWrapper\n",
     "from langchain.utilities import SQLDatabase\n",
     "from langchain_experimental.sql import SQLDatabaseChain\n",
-    ")\n",
     "from langchain.agents import initialize_agent, Tool\n",
     "from langchain.agents import AgentType\n",
     "from langchain.chat_models import ChatOpenAI\n",

libs/langchain/langchain/retrievers/time_weighted_retriever.py

@@ -50,7 +50,7 @@ class TimeWeightedVectorStoreRetriever(BaseRetriever):
     def _document_get_date(self, field: str, document: Document) -> datetime.datetime:
         """Return the value of the date field of a document."""
         if field in document.metadata:
-            if type(document.metadata[field]) == float:
+            if isinstance(document.metadata[field], float):
                 return datetime.datetime.fromtimestamp(document.metadata[field])
             return document.metadata[field]
         return datetime.datetime.now()

libs/langchain/langchain/utilities/serpapi.py

@@ -147,7 +147,7 @@ class SerpAPIWrapper(BaseModel):
                 answer = {}
                 for key, value in answer_box.items():
                     if not isinstance(value, (list, dict)) and not (
-                        type(value) == str and value.startswith("http")
+                        isinstance(value, str) and value.startswith("http")
                     ):
                         answer[key] = value
                 return str(answer)
@@ -189,8 +189,8 @@ class SerpAPIWrapper(BaseModel):
                 snippets.append(knowledge_graph["description"])
             for key, value in knowledge_graph.items():
                 if (
-                    type(key) == str
-                    and type(value) == str
+                    isinstance(key, str)
+                    and isinstance(value, str)
                     and key not in ["title", "description"]
                     and not key.endswith("_stick")
                     and not key.endswith("_link")

libs/langchain/tests/unit_tests/schema/runnable/test_runnable.py

@@ -790,7 +790,7 @@ async def test_prompt() -> None:
     assert stream_log[0].ops[0]["value"]["logs"] == []
     assert stream_log[0].ops[0]["value"]["final_output"] is None
     assert stream_log[0].ops[0]["value"]["streamed_output"] == []
-    assert type(stream_log[0].ops[0]["value"]["id"]) == str
+    assert isinstance(stream_log[0].ops[0]["value"]["id"], str)
 
     assert stream_log[1:] == [
         RunLogPatch(
@@ -1832,7 +1832,7 @@ async def test_map_astream() -> None:
 
     assert final_state.state["final_output"] == final_value
     assert len(final_state.state["streamed_output"]) == len(streamed_chunks)
-    assert type(final_state.state["id"]) == str
+    assert isinstance(final_state.state["id"], str)
     assert len(final_state.ops) == len(streamed_ops)
     assert len(final_state.state["logs"]) == 5
     assert final_state.state["logs"][0]["name"] == "ChatPromptTemplate"