Create pydantic v1 namespace, add partial compatibility for pydantic v2 (#9123)

First of a few PRs to add full compatibility to both pydantic v1 and v2.

This PR creates pydantic v1 namespace and adds it to sys.modules.

Upcoming changes: 
1. Handle `openapi-schema-pydantic = "^1.2"` and dependent chains/tools
2. bump dependencies to versions that are cross compatible for pydantic
or remove them (see below)
3. Add tests to github workflows to test with pydantic v1 and v2

**Dependencies**

From a quick look (could be wrong since was done manually)

**dependencies pinning pydantic below 2** (some of these can be bumped
to newer versions are provide cross-compatible code)
anthropic
bentoml
confection
fastapi
langsmith
octoai-sdk
openapi-schema-pydantic
qdrant-client
spacy
steamship
thinc
zep-python

Unpinned

marqo (*)
nomic (*)
xinference(*)

libs/langchain/langchain/__init__.py

@@ -1,8 +1,28 @@
+# ruff: noqa: E402
 """Main entrypoint into package."""
-
+import importlib
+import sys
 from importlib import metadata
 from typing import Optional
 
+## Create namespaces for pydantic v1 and v2.
+# This code must stay at the top of the file before other modules may
+# attempt to import pydantic since it adds pydantic_v1 and pydantic_v2 to sys.modules.
+#
+# This hack is done for the following reasons:
+# * Langchain will attempt to remain compatible with both pydantic v1 and v2 since
+#   both dependencies and dependents may be stuck on either version of v1 or v2.
+# * Creating namespaces for pydantic v1 and v2 should allow us to write code that
+#   unambiguously uses either v1 or v2 API.
+# * This change is easier to roll out and roll back.
+
+try:
+    pydantic_v1 = importlib.import_module("pydantic.v1")
+except ImportError:
+    pydantic_v1 = importlib.import_module("pydantic")
+
+sys.modules["pydantic_v1"] = pydantic_v1
+
 from langchain.agents import MRKLChain, ReActChain, SelfAskWithSearchChain
 from langchain.cache import BaseCache
 from langchain.chains import (
@@ -67,6 +87,7 @@ llm_cache: Optional[BaseCache] = None
 # For backwards compatibility
 SerpAPIChain = SerpAPIWrapper
 
+
 __all__ = [
     "LLMChain",
     "LLMBashChain",

libs/langchain/langchain/agents/agent.py

@@ -10,7 +10,7 @@ from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, Sequence, Tuple, Union
 
 import yaml
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 from langchain.agents.agent_iterator import AgentExecutorIterator
 from langchain.agents.agent_types import AgentType

libs/langchain/langchain/agents/agent_toolkits/amadeus/toolkit.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.tools import BaseTool

libs/langchain/langchain/agents/agent_toolkits/azure_cognitive_services.py

@@ -19,7 +19,7 @@ class AzureCognitiveServicesToolkit(BaseToolkit):
     def get_tools(self) -> List[BaseTool]:
         """Get the tools in the toolkit."""
 
-        tools = [
+        tools: List[BaseTool] = [
             AzureCogsFormRecognizerTool(),
             AzureCogsSpeech2TextTool(),
             AzureCogsText2SpeechTool(),

libs/langchain/langchain/agents/agent_toolkits/base.py

@@ -2,7 +2,7 @@
 from abc import ABC, abstractmethod
 from typing import List
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 from langchain.tools import BaseTool
 

libs/langchain/langchain/agents/agent_toolkits/file_management/toolkit.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import List, Optional
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.tools import BaseTool
@@ -15,7 +15,8 @@ from langchain.tools.file_management.read import ReadFileTool
 from langchain.tools.file_management.write import WriteFileTool
 
 _FILE_TOOLS = {
-    tool_cls.__fields__["name"].default: tool_cls
+    # "Type[Runnable[Any, Any]]" has no attribute "__fields__"  [attr-defined]
+    tool_cls.__fields__["name"].default: tool_cls  # type: ignore[attr-defined]
     for tool_cls in [
         CopyFileTool,
         DeleteFileTool,

libs/langchain/langchain/agents/agent_toolkits/gmail/toolkit.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.tools import BaseTool

libs/langchain/langchain/agents/agent_toolkits/nla/toolkit.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any, List, Optional, Sequence
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.agents.agent_toolkits.nla.tool import NLATool

libs/langchain/langchain/agents/agent_toolkits/office365/toolkit.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.tools import BaseTool

libs/langchain/langchain/agents/agent_toolkits/openapi/planner.py

@@ -5,7 +5,7 @@ from functools import partial
 from typing import Any, Callable, Dict, List, Optional
 
 import yaml
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import AgentExecutor
 from langchain.agents.agent_toolkits.openapi.planner_prompt import (

libs/langchain/langchain/agents/agent_toolkits/playwright/toolkit.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, List, Optional, Type, cast
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.tools.base import BaseTool

libs/langchain/langchain/agents/agent_toolkits/powerbi/toolkit.py

@@ -1,7 +1,7 @@
 """Toolkit for interacting with a Power BI dataset."""
 from typing import List, Optional, Union
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.callbacks.base import BaseCallbackManager

libs/langchain/langchain/agents/agent_toolkits/spark_sql/toolkit.py

@@ -1,7 +1,7 @@
 """Toolkit for interacting with Spark SQL."""
 from typing import List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.schema.language_model import BaseLanguageModel

libs/langchain/langchain/agents/agent_toolkits/sql/toolkit.py

@@ -1,7 +1,7 @@
 """Toolkit for interacting with an SQL database."""
 from typing import List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.schema.language_model import BaseLanguageModel

libs/langchain/langchain/agents/agent_toolkits/vectorstore/toolkit.py

@@ -1,7 +1,7 @@
 """Toolkit for interacting with a vector store."""
 from typing import List
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.agents.agent_toolkits.base import BaseToolkit
 from langchain.llms.openai import OpenAI

libs/langchain/langchain/agents/chat/base.py

@@ -1,6 +1,6 @@
 from typing import Any, List, Optional, Sequence, Tuple
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentOutputParser
 from langchain.agents.chat.output_parser import ChatOutputParser

libs/langchain/langchain/agents/conversational/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, List, Optional, Sequence
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentOutputParser
 from langchain.agents.agent_types import AgentType

libs/langchain/langchain/agents/conversational_chat/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, List, Optional, Sequence, Tuple
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentOutputParser
 from langchain.agents.conversational_chat.output_parser import ConvoOutputParser

libs/langchain/langchain/agents/mrkl/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Callable, List, NamedTuple, Optional, Sequence
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentExecutor, AgentOutputParser
 from langchain.agents.agent_types import AgentType

libs/langchain/langchain/agents/openai_functions_agent/base.py

@@ -4,7 +4,7 @@ from dataclasses import dataclass
 from json import JSONDecodeError
 from typing import Any, List, Optional, Sequence, Tuple, Union
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.agents import BaseSingleActionAgent
 from langchain.callbacks.base import BaseCallbackManager

libs/langchain/langchain/agents/openai_functions_multi_agent/base.py

@@ -4,7 +4,7 @@ from dataclasses import dataclass
 from json import JSONDecodeError
 from typing import Any, List, Optional, Sequence, Tuple, Union
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.agents import BaseMultiActionAgent
 from langchain.callbacks.base import BaseCallbackManager

libs/langchain/langchain/agents/react/base.py

@@ -1,7 +1,7 @@
 """Chain that implements the ReAct paper from https://arxiv.org/pdf/2210.03629.pdf."""
 from typing import Any, List, Optional, Sequence
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentExecutor, AgentOutputParser
 from langchain.agents.agent_types import AgentType

libs/langchain/langchain/agents/self_ask_with_search/base.py

@@ -1,7 +1,7 @@
 """Chain that does self-ask with search."""
 from typing import Any, Sequence, Union
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentExecutor, AgentOutputParser
 from langchain.agents.agent_types import AgentType

libs/langchain/langchain/agents/structured_chat/base.py

@@ -1,7 +1,7 @@
 import re
 from typing import Any, List, Optional, Sequence, Tuple
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import Agent, AgentOutputParser
 from langchain.agents.structured_chat.output_parser import (

libs/langchain/langchain/agents/structured_chat/output_parser.py

@@ -5,7 +5,7 @@ import logging
 import re
 from typing import Optional, Union
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.agents.agent import AgentOutputParser
 from langchain.agents.structured_chat.prompt import FORMAT_INSTRUCTIONS

libs/langchain/langchain/callbacks/tracers/schemas.py

@@ -8,7 +8,7 @@ from uuid import UUID
 
 from langsmith.schemas import RunBase as BaseRunV2
 from langsmith.schemas import RunTypeEnum as RunTypeEnumDep
-from pydantic import BaseModel, Field, root_validator
+from pydantic_v1 import BaseModel, Field, root_validator
 
 from langchain.schema import LLMResult
 

libs/langchain/langchain/chains/api/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/api/openapi/chain.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import json
 from typing import Any, Dict, List, NamedTuple, Optional, cast
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 from requests import Response
 
 from langchain.callbacks.manager import CallbackManagerForChainRun, Callbacks

libs/langchain/langchain/chains/base.py

@@ -10,7 +10,7 @@ from pathlib import Path
 from typing import Any, Dict, List, Optional, Union
 
 import yaml
-from pydantic import Field, root_validator, validator
+from pydantic_v1 import Field, root_validator, validator
 
 import langchain
 from langchain.callbacks.base import BaseCallbackManager

libs/langchain/langchain/chains/combine_documents/base.py

@@ -3,7 +3,7 @@
 from abc import ABC, abstractmethod
 from typing import Any, Dict, List, Optional, Tuple
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/combine_documents/map_reduce.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional, Tuple
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import Callbacks
 from langchain.chains.combine_documents.base import BaseCombineDocumentsChain

libs/langchain/langchain/chains/combine_documents/map_rerank.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional, Sequence, Tuple, Union, cast
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import Callbacks
 from langchain.chains.combine_documents.base import BaseCombineDocumentsChain

libs/langchain/langchain/chains/combine_documents/reduce.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from typing import Any, Callable, List, Optional, Protocol, Tuple
 
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.callbacks.manager import Callbacks
 from langchain.chains.combine_documents.base import BaseCombineDocumentsChain

libs/langchain/langchain/chains/combine_documents/refine.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Tuple
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import Callbacks
 from langchain.chains.combine_documents.base import (

libs/langchain/langchain/chains/combine_documents/stuff.py

@@ -2,7 +2,7 @@
 
 from typing import Any, Dict, List, Optional, Tuple
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import Callbacks
 from langchain.chains.combine_documents.base import (

libs/langchain/langchain/chains/constitutional_ai/models.py

@@ -1,5 +1,5 @@
 """Models for the Constitutional AI chain."""
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 
 class ConstitutionalPrinciple(BaseModel):

libs/langchain/langchain/chains/conversation/base.py

@@ -1,7 +1,7 @@
 """Chain that carries on a conversation and calls an LLM."""
 from typing import Dict, List
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.chains.conversation.prompt import PROMPT
 from langchain.chains.llm import LLMChain

libs/langchain/langchain/chains/conversational_retrieval/base.py

@@ -7,7 +7,7 @@ from abc import abstractmethod
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/elasticsearch_database/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING, Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/flare/base.py

@@ -5,7 +5,7 @@ from abc import abstractmethod
 from typing import Any, Dict, List, Optional, Sequence, Tuple
 
 import numpy as np
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import (
     CallbackManagerForChainRun,

libs/langchain/langchain/chains/graph_qa/arangodb.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import re
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.base_language import BaseLanguageModel
 from langchain.callbacks.manager import CallbackManagerForChainRun

libs/langchain/langchain/chains/graph_qa/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/graph_qa/cypher.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import re
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/graph_qa/hugegraph.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/graph_qa/kuzu.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/graph_qa/nebulagraph.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/graph_qa/neptune_cypher.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import re
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.base_language import BaseLanguageModel
 from langchain.callbacks.manager import CallbackManagerForChainRun

libs/langchain/langchain/chains/graph_qa/sparql.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/hyde/base.py

@@ -7,7 +7,7 @@ from __future__ import annotations
 from typing import Any, Dict, List, Optional
 
 import numpy as np
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/llm.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import warnings
 from typing import Any, Dict, List, Optional, Sequence, Tuple, Union
 
-from pydantic import Extra, Field
+from pydantic_v1 import Extra, Field
 
 from langchain.callbacks.manager import (
     AsyncCallbackManager,

libs/langchain/langchain/chains/llm_bash/base.py

@@ -5,7 +5,7 @@ import logging
 import warnings
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/llm_checker/base.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import warnings
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/llm_math/base.py

@@ -7,7 +7,7 @@ import warnings
 from typing import Any, Dict, List, Optional
 
 import numexpr
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/llm_requests.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains import LLMChain

libs/langchain/langchain/chains/llm_summarization_checker/base.py

@@ -6,7 +6,7 @@ import warnings
 from pathlib import Path
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/llm_symbolic_math/base.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import re
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.base_language import BaseLanguageModel
 from langchain.callbacks.manager import (

libs/langchain/langchain/chains/mapreduce.py

@@ -7,7 +7,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Mapping, Optional
 
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.callbacks.manager import CallbackManagerForChainRun, Callbacks
 from langchain.chains import ReduceDocumentsChain

libs/langchain/langchain/chains/moderation.py

@@ -1,7 +1,7 @@
 """Pass input through a moderation endpoint."""
 from typing import Any, Dict, List, Optional
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/natbot/base.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import warnings
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/openai_functions/base.py

@@ -12,7 +12,7 @@ from typing import (
     Union,
 )
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 from langchain.base_language import BaseLanguageModel
 from langchain.chains import LLMChain
@@ -87,7 +87,9 @@ def _get_python_function_arguments(function: Callable, arg_descriptions: dict) -
         if arg == "return":
             continue
         if isinstance(arg_type, type) and issubclass(arg_type, BaseModel):
-            properties[arg] = arg_type.schema()
+            # Mypy error:
+            # "type" has no attribute "schema"
+            properties[arg] = arg_type.schema()  # type: ignore[attr-defined]
         elif arg_type.__name__ in PYTHON_TO_JSON_TYPES:
             properties[arg] = {"type": PYTHON_TO_JSON_TYPES[arg_type.__name__]}
         if arg in arg_descriptions:
@@ -147,7 +149,9 @@ def convert_to_openai_function(
     if isinstance(function, dict):
         return function
     elif isinstance(function, type) and issubclass(function, BaseModel):
-        schema = function.schema()
+        # Mypy error:
+        # "type" has no attribute "schema"
+        schema = function.schema()  # type: ignore[attr-defined]
         return {
             "name": schema["title"],
             "description": schema["description"],
@@ -224,7 +228,7 @@ def create_openai_fn_chain(
                 from langchain.chat_models import ChatOpenAI
                 from langchain.prompts import ChatPromptTemplate, HumanMessagePromptTemplate
 
-                from pydantic import BaseModel, Field
+                from pydantic_v1 import BaseModel, Field
 
 
                 class RecordPerson(BaseModel):
@@ -310,7 +314,7 @@ def create_structured_output_chain(
                 from langchain.chat_models import ChatOpenAI
                 from langchain.prompts import ChatPromptTemplate, HumanMessagePromptTemplate
 
-                from pydantic import BaseModel, Field
+                from pydantic_v1 import BaseModel, Field
 
                 class Dog(BaseModel):
                     \"\"\"Identifying information about a dog.\"\"\"

libs/langchain/langchain/chains/openai_functions/citation_fuzzy_match.py

@@ -1,6 +1,6 @@
 from typing import Iterator, List
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.chains.llm import LLMChain
 from langchain.chains.openai_functions.utils import get_llm_kwargs

libs/langchain/langchain/chains/openai_functions/extraction.py

@@ -1,6 +1,6 @@
 from typing import Any, List
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 from langchain.chains.base import Chain
 from langchain.chains.llm import LLMChain

libs/langchain/langchain/chains/openai_functions/qa_with_structure.py

@@ -1,6 +1,6 @@
 from typing import Any, List, Optional, Type, Union
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.chains.llm import LLMChain
 from langchain.chains.openai_functions.utils import get_llm_kwargs

libs/langchain/langchain/chains/prompt_selector.py

@@ -1,7 +1,7 @@
 from abc import ABC, abstractmethod
 from typing import Callable, List, Tuple
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.chat_models.base import BaseChatModel
 from langchain.llms.base import BaseLLM

libs/langchain/langchain/chains/qa_generation/base.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import json
 from typing import Any, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain

libs/langchain/langchain/chains/qa_with_sources/base.py

@@ -7,7 +7,7 @@ import re
 from abc import ABC, abstractmethod
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/qa_with_sources/retrieval.py

@@ -2,7 +2,7 @@
 
 from typing import Any, Dict, List
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/qa_with_sources/vector_db.py

@@ -3,7 +3,7 @@
 import warnings
 from typing import Any, Dict, List
 
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/query_constructor/ir.py

@@ -5,7 +5,7 @@ from abc import ABC, abstractmethod
 from enum import Enum
 from typing import Any, List, Optional, Sequence, Union
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 
 class Visitor(ABC):

libs/langchain/langchain/chains/query_constructor/schema.py

@@ -1,4 +1,4 @@
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 
 class AttributeInfo(BaseModel):

libs/langchain/langchain/chains/retrieval_qa/base.py

@@ -6,7 +6,7 @@ import warnings
 from abc import abstractmethod
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, Field, root_validator
+from pydantic_v1 import Extra, Field, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/router/base.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 from abc import ABC
 from typing import Any, Dict, List, Mapping, NamedTuple, Optional
 
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/router/embedding_router.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional, Sequence, Tuple, Type
 
-from pydantic import Extra
+from pydantic_v1 import Extra
 
 from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.router.base import RouterChain

libs/langchain/langchain/chains/router/llm_router.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from typing import Any, Dict, List, Optional, Type, cast
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/sequential.py

@@ -1,7 +1,7 @@
 """Chain pipeline where the outputs of one step feed directly into next."""
 from typing import Any, Dict, List, Optional
 
-from pydantic import Extra, root_validator
+from pydantic_v1 import Extra, root_validator
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chains/transform.py

@@ -3,7 +3,7 @@ import functools
 import logging
 from typing import Any, Awaitable, Callable, Dict, List, Optional
 
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForChainRun,

libs/langchain/langchain/chat_models/anyscale.py

@@ -7,7 +7,7 @@ import sys
 from typing import TYPE_CHECKING, Optional, Set
 
 import requests
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 
 from langchain.adapters.openai import convert_message_to_dict
 from langchain.chat_models.openai import (

libs/langchain/langchain/chat_models/azure_openai.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import logging
 from typing import Any, Dict, Mapping
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.chat_models.openai import ChatOpenAI
 from langchain.schema import ChatResult

libs/langchain/langchain/chat_models/azureml_endpoint.py

@@ -1,7 +1,7 @@
 import json
 from typing import Any, Dict, List, Optional
 
-from pydantic import validator
+from pydantic_v1 import validator
 
 from langchain.callbacks.manager import CallbackManagerForLLMRun
 from langchain.chat_models.base import SimpleChatModel

libs/langchain/langchain/chat_models/base.py

@@ -14,7 +14,7 @@ from typing import (
     cast,
 )
 
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 
 import langchain
 from langchain.callbacks.base import BaseCallbackManager

libs/langchain/langchain/chat_models/google_palm.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import logging
 from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional
 
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 from tenacity import (
     before_sleep_log,
     retry,

libs/langchain/langchain/chat_models/human.py

@@ -5,7 +5,7 @@ from io import StringIO
 from typing import Any, Callable, Dict, List, Mapping, Optional
 
 import yaml
-from pydantic import Field
+from pydantic_v1 import Field
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForLLMRun,

libs/langchain/langchain/chat_models/jinachat.py

@@ -15,7 +15,7 @@ from typing import (
     Union,
 )
 
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 from tenacity import (
     before_sleep_log,
     retry,

libs/langchain/langchain/chat_models/mlflow_ai_gateway.py

@@ -3,7 +3,7 @@ import logging
 from functools import partial
 from typing import Any, Dict, List, Mapping, Optional
 
-from pydantic import BaseModel, Extra
+from pydantic_v1 import BaseModel, Extra
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForLLMRun,
@@ -26,7 +26,9 @@ from langchain.schema.messages import (
 logger = logging.getLogger(__name__)
 
 
-class ChatParams(BaseModel, extra=Extra.allow):
+# Ignoring type because below is valid pydantic code
+# Unexpected keyword argument "extra" for "__init_subclass__" of "object"  [call-arg]
+class ChatParams(BaseModel, extra=Extra.allow):  # type: ignore[call-arg]
     """Parameters for the MLflow AI Gateway LLM."""
 
     temperature: float = 0.0

libs/langchain/langchain/chat_models/openai.py

@@ -17,7 +17,7 @@ from typing import (
     Union,
 )
 
-from pydantic import Field, root_validator
+from pydantic_v1 import Field, root_validator
 
 from langchain.adapters.openai import convert_dict_to_message, convert_message_to_dict
 from langchain.callbacks.manager import (

libs/langchain/langchain/chat_models/vertexai.py

@@ -2,7 +2,7 @@
 from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, Dict, List, Optional
 
-from pydantic import root_validator
+from pydantic_v1 import root_validator
 
 from langchain.callbacks.manager import CallbackManagerForLLMRun
 from langchain.chat_models.base import BaseChatModel

libs/langchain/langchain/document_loaders/apify_dataset.py

@@ -1,6 +1,6 @@
 from typing import Any, Callable, Dict, List
 
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/blob_loaders/schema.py

@@ -13,7 +13,7 @@ from io import BufferedReader, BytesIO
 from pathlib import PurePath
 from typing import Any, Generator, Iterable, Mapping, Optional, Union
 
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 PathLike = Union[str, PurePath]
 

libs/langchain/langchain/document_loaders/docugami.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import Any, Dict, List, Mapping, Optional, Sequence, Union
 
 import requests
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/dropbox.py

@@ -11,7 +11,7 @@ import tempfile
 from pathlib import Path
 from typing import Any, Dict, List, Optional
 
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/embaas.py

@@ -3,7 +3,7 @@ import warnings
 from typing import Any, Dict, Iterator, List, Optional
 
 import requests
-from pydantic import BaseModel, root_validator, validator
+from pydantic_v1 import BaseModel, root_validator, validator
 from typing_extensions import NotRequired, TypedDict
 
 from langchain.docstore.document import Document

libs/langchain/langchain/document_loaders/github.py

@@ -3,7 +3,7 @@ from datetime import datetime
 from typing import Dict, Iterator, List, Literal, Optional, Union
 
 import requests
-from pydantic import BaseModel, root_validator, validator
+from pydantic_v1 import BaseModel, root_validator, validator
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/googledrive.py

@@ -11,7 +11,7 @@ import os
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Sequence, Union
 
-from pydantic import BaseModel, root_validator, validator
+from pydantic_v1 import BaseModel, root_validator, validator
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/onedrive.py

@@ -8,7 +8,7 @@ from enum import Enum
 from pathlib import Path
 from typing import TYPE_CHECKING, Dict, List, Optional, Type, Union
 
-from pydantic import BaseModel, BaseSettings, Field, FilePath, SecretStr
+from pydantic_v1 import BaseModel, BaseSettings, Field, FilePath, SecretStr
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/onedrive_file.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import tempfile
 from typing import TYPE_CHECKING, List
 
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_loaders/youtube.py

@@ -6,8 +6,8 @@ from pathlib import Path
 from typing import Any, Dict, List, Optional, Sequence, Union
 from urllib.parse import parse_qs, urlparse
 
-from pydantic import root_validator
-from pydantic.dataclasses import dataclass
+from pydantic_v1 import root_validator
+from pydantic_v1.dataclasses import dataclass
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader

libs/langchain/langchain/document_transformers/embeddings_redundant_filter.py

@@ -2,7 +2,7 @@
 from typing import Any, Callable, List, Sequence
 
 import numpy as np
-from pydantic import BaseModel, Field
+from pydantic_v1 import BaseModel, Field
 
 from langchain.embeddings.base import Embeddings
 from langchain.schema import BaseDocumentTransformer, Document

libs/langchain/langchain/document_transformers/long_context_reorder.py

@@ -1,7 +1,7 @@
 """Reorder documents"""
 from typing import Any, List, Sequence
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 from langchain.schema import BaseDocumentTransformer, Document
 

libs/langchain/langchain/document_transformers/openai_functions.py

@@ -1,7 +1,7 @@
 """Document transformers that use OpenAI Functions models"""
 from typing import Any, Dict, Optional, Sequence, Type, Union
 
-from pydantic import BaseModel
+from pydantic_v1 import BaseModel
 
 from langchain.chains.llm import LLMChain
 from langchain.chains.openai_functions import create_tagging_chain

libs/langchain/langchain/embeddings/aleph_alpha.py

@@ -1,6 +1,6 @@
 from typing import Any, Dict, List, Optional
 
-from pydantic import BaseModel, root_validator
+from pydantic_v1 import BaseModel, root_validator
 
 from langchain.embeddings.base import Embeddings
 from langchain.utils import get_from_dict_or_env