community[major], core[patch], langchain[patch], experimental[patch]: Create langchain-community (#14463)

Moved the following modules to new package langchain-community in a backwards compatible fashion: ``` mv langchain/langchain/adapters community/langchain_community mv langchain/langchain/callbacks community/langchain_community/callbacks mv langchain/langchain/chat_loaders community/langchain_community mv langchain/langchain/chat_models community/langchain_community mv langchain/langchain/document_loaders community/langchain_community mv langchain/langchain/docstore community/langchain_community mv langchain/langchain/document_transformers community/langchain_community mv langchain/langchain/embeddings community/langchain_community mv langchain/langchain/graphs community/langchain_community mv langchain/langchain/llms community/langchain_community mv langchain/langchain/memory/chat_message_histories community/langchain_community mv langchain/langchain/retrievers community/langchain_community mv langchain/langchain/storage community/langchain_community mv langchain/langchain/tools community/langchain_community mv langchain/langchain/utilities community/langchain_community mv langchain/langchain/vectorstores community/langchain_community mv langchain/langchain/agents/agent_toolkits community/langchain_community mv langchain/langchain/cache.py community/langchain_community mv langchain/langchain/adapters community/langchain_community mv langchain/langchain/callbacks community/langchain_community/callbacks mv langchain/langchain/chat_loaders community/langchain_community mv langchain/langchain/chat_models community/langchain_community mv langchain/langchain/document_loaders community/langchain_community mv langchain/langchain/docstore community/langchain_community mv langchain/langchain/document_transformers community/langchain_community mv langchain/langchain/embeddings community/langchain_community mv langchain/langchain/graphs community/langchain_community mv langchain/langchain/llms community/langchain_community mv langchain/langchain/memory/chat_message_histories community/langchain_community mv langchain/langchain/retrievers community/langchain_community mv langchain/langchain/storage community/langchain_community mv langchain/langchain/tools community/langchain_community mv langchain/langchain/utilities community/langchain_community mv langchain/langchain/vectorstores community/langchain_community mv langchain/langchain/agents/agent_toolkits community/langchain_community mv langchain/langchain/cache.py community/langchain_community ``` Moved the following to core ``` mv langchain/langchain/utils/json_schema.py core/langchain_core/utils mv langchain/langchain/utils/html.py core/langchain_core/utils mv langchain/langchain/utils/strings.py core/langchain_core/utils cat langchain/langchain/utils/env.py >> core/langchain_core/utils/env.py rm langchain/langchain/utils/env.py ``` See .scripts/community_split/script_integrations.sh for all changes
2025-09-06 05:25:04 +00:00 · 2023-12-11 13:53:30 -08:00
parent c0f4b95aa9
commit ed58eeb9c5
2446 changed files with 171805 additions and 137118 deletions
--- a/libs/community/langchain_community/callbacks/human.py
+++ b/libs/community/langchain_community/callbacks/human.py
@@ -0,0 +1,88 @@
+from typing import Any, Awaitable, Callable, Dict, Optional
+from uuid import UUID
+
+from langchain_core.callbacks import AsyncCallbackHandler, BaseCallbackHandler
+
+
+def _default_approve(_input: str) -> bool:
+    msg = (
+        "Do you approve of the following input? "
+        "Anything except 'Y'/'Yes' (case-insensitive) will be treated as a no."
+    )
+    msg += "\n\n" + _input + "\n"
+    resp = input(msg)
+    return resp.lower() in ("yes", "y")
+
+
+async def _adefault_approve(_input: str) -> bool:
+    msg = (
+        "Do you approve of the following input? "
+        "Anything except 'Y'/'Yes' (case-insensitive) will be treated as a no."
+    )
+    msg += "\n\n" + _input + "\n"
+    resp = input(msg)
+    return resp.lower() in ("yes", "y")
+
+
+def _default_true(_: Dict[str, Any]) -> bool:
+    return True
+
+
+class HumanRejectedException(Exception):
+    """Exception to raise when a person manually review and rejects a value."""
+
+
+class HumanApprovalCallbackHandler(BaseCallbackHandler):
+    """Callback for manually validating values."""
+
+    raise_error: bool = True
+
+    def __init__(
+        self,
+        approve: Callable[[Any], bool] = _default_approve,
+        should_check: Callable[[Dict[str, Any]], bool] = _default_true,
+    ):
+        self._approve = approve
+        self._should_check = should_check
+
+    def on_tool_start(
+        self,
+        serialized: Dict[str, Any],
+        input_str: str,
+        *,
+        run_id: UUID,
+        parent_run_id: Optional[UUID] = None,
+        **kwargs: Any,
+    ) -> Any:
+        if self._should_check(serialized) and not self._approve(input_str):
+            raise HumanRejectedException(
+                f"Inputs {input_str} to tool {serialized} were rejected."
+            )
+
+
+class AsyncHumanApprovalCallbackHandler(AsyncCallbackHandler):
+    """Asynchronous callback for manually validating values."""
+
+    raise_error: bool = True
+
+    def __init__(
+        self,
+        approve: Callable[[Any], Awaitable[bool]] = _adefault_approve,
+        should_check: Callable[[Dict[str, Any]], bool] = _default_true,
+    ):
+        self._approve = approve
+        self._should_check = should_check
+
+    async def on_tool_start(
+        self,
+        serialized: Dict[str, Any],
+        input_str: str,
+        *,
+        run_id: UUID,
+        parent_run_id: Optional[UUID] = None,
+        **kwargs: Any,
+    ) -> Any:
+        if self._should_check(serialized) and not await self._approve(input_str):
+            raise HumanRejectedException(
+                f"Inputs {input_str} to tool {serialized} were rejected."
+            )