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LangChain Forum - Topics tagged python-help

Llama-server process has terminated: invalid argument --load-mode with Ollama client 0.32.6 and langchain-ollama 1.1.0 Langchain Certified Agent Engineer Exam - Exam link not received and no response Null-drift: A bare-metal O(1) Memory Store for continuous LangGraph agents Clarification needed: Assistant config vs context and graph initialization Proposal: a small local helper for readable run traces via PR Proxy Authentication Required 407 What is the right way to dynamically create and run a graph? Re-Implement claude code's dynamic workflow using langchian & deepagents How to define a correct state for multi-agent system Response Format Groq Model Pydantic I hope to get some recommendations for practical skills Interrupt does not work correctly in LangGraph The Qwen3.6b model in fireworks through initchatmodel reporting hugely inflated tokens For parallel execution in Node, should i use the functional API? Potential Enhancement: Django-Managed PostgresSaver Pre-interrupt() code re-runs on resume — anti-pattern, or is there a sanctioned way to detect resume? Interrupt parallel branch execution Best practices for self-hosting LangGraph Server OSS without LangGraph keys Dynamically Enabling/Disabling Graphs in a LangGraph Server at Runtime LangGraph thread copy can take 12+ minutes: recommended production pattern? Will DeltaChannel be the default for AgentState.messages, or expected to stay opt-in? Proposal: additional docs for implementing custom DB checkpointers or a guide on generic base checkpointer Prompt_cache_retention: '24h' supported in langchain agents and where to provide it, inside invoke or while creating client? Could RAG pipelines realistically cause deployment timeouts, is Render suitable for first-time RAG deployments? How do I use langchain_postgres' init_vectorstore_table correctly? Proposal: Graph-wide default error handler for StateGraph (fallback for nodes without error_handler) Support timedelta for CachePolicy.ttl, consistent with TimeoutPolicy Anyone confirms this issue that deepagent ui streaming is disturb by update in deepagent or bug issue Best Stack for Building AI Applications Seeking help regarding the connection between Websocket and tool calls
Bogus warning messages after upgrading dependencies which...
2026-04-04 · via LangChain Forum - Topics tagged python-help

See the following warning messages in my terminal:

/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/trustcall/_base.py:46: LangGraphDeprecatedSinceV10: Importing Send from langgraph.constants is deprecated. Please use 'from langgraph.types import Send' instead. Deprecated in LangGraph V1.0 to be removed in V2.0.
  from langgraph.constants import Send
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/trustcall/_base.py:46: LangGraphDeprecatedSinceV10: Importing Send from langgraph.constants is deprecated. Please use 'from langgraph.types import Send' instead. Deprecated in LangGraph V1.0 to be removed in V2.0.
  from langgraph.constants import Send
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/psycopg_pool/pool_async.py:163: RuntimeWarning: opening the async pool AsyncConnectionPool in the constructor is deprecated and will not be supported anymore in a future release. Please use `await pool.open()`, or use the pool as context manager using: `async with AsyncConnectionPool(...) as pool: `...
  warnings.warn(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
  decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:147: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
  return self._jws.encode(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
  decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
  decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.

What are the causes and how to get rid of them? I am concerned about the `InsecureKeyLengthWarning` which could have security impact if not addressed.

System Information
------------------
> OS:  Linux
> OS Version:  #20-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 13 20:07:29 UTC 2026
> Python Version:  3.13.7 (main, Mar  3 2026, 12:19:54) [GCC 15.2.0]

Package Information
-------------------
> langchain_core: 0.3.45
> langchain: 0.3.20
> langchain_community: 0.3.19
> langsmith: 0.3.15
> langchain_google_genai: 2.1.0
> langchain_google_vertexai: 2.0.15
> langchain_openai: 0.3.8
> langchain_text_splitters: 0.3.6
> langgraph_api: 0.2.38
> langgraph_cli: 0.2.10
> langgraph_license: Installed. No version info available.
> langgraph_runtime: Installed. No version info available.
> langgraph_runtime_inmem: 0.2.0
> langgraph_sdk: 0.1.70

Optional packages not installed
-------------------------------
> langserve

Other Dependencies
------------------
> aiohttp<4.0.0,>=3.8.3: Installed. No version info available.
> anthropic[vertexai]: Installed. No version info available.
> async-timeout<5.0.0,>=4.0.0;: Installed. No version info available.
> blockbuster<2.0.0,>=1.5.24: Installed. No version info available.
> click: 8.1.8
> cloudpickle>=3.0.0: Installed. No version info available.
> cryptography<45.0,>=42.0.0: Installed. No version info available.
> dataclasses-json<0.7,>=0.5.7: Installed. No version info available.
> filetype: 1.2.0
> google-ai-generativelanguage: 0.6.16
> google-cloud-aiplatform: 1.84.0
> google-cloud-storage: 2.19.0
> httpx: 0.28.1
> httpx-sse: 0.4.0
> httpx-sse<1.0.0,>=0.4.0: Installed. No version info available.
> httpx>=0.25.0: Installed. No version info available.
> httpx>=0.25.2: Installed. No version info available.
> jsonpatch<2.0,>=1.33: Installed. No version info available.
> jsonschema-rs<0.30,>=0.20.0: Installed. No version info available.
> langchain-anthropic;: Installed. No version info available.
> langchain-aws;: Installed. No version info available.
> langchain-cohere;: Installed. No version info available.
> langchain-community;: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.34: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.41: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.42: Installed. No version info available.
> langchain-core>=0.2.38: Installed. No version info available.
> langchain-deepseek;: Installed. No version info available.
> langchain-fireworks;: Installed. No version info available.
> langchain-google-genai;: Installed. No version info available.
> langchain-google-vertexai;: Installed. No version info available.
> langchain-groq;: Installed. No version info available.
> langchain-huggingface;: Installed. No version info available.
> langchain-mistralai: Installed. No version info available.
> langchain-mistralai;: Installed. No version info available.
> langchain-ollama;: Installed. No version info available.
> langchain-openai;: Installed. No version info available.
> langchain-text-splitters<1.0.0,>=0.3.6: Installed. No version info available.
> langchain-together;: Installed. No version info available.
> langchain-xai;: Installed. No version info available.
> langchain<1.0.0,>=0.3.20: Installed. No version info available.
> langgraph-checkpoint>=2.0.23: Installed. No version info available.
> langgraph-checkpoint>=2.0.25: Installed. No version info available.
> langgraph-runtime-inmem<0.3,>=0.2.0: Installed. No version info available.
> langgraph-sdk>=0.1.66: Installed. No version info available.
> langgraph>=0.2: Installed. No version info available.
> langgraph>=0.3.27: Installed. No version info available.
> langsmith-pyo3: Installed. No version info available.
> langsmith<0.4,>=0.1.125: Installed. No version info available.
> langsmith<0.4,>=0.1.17: Installed. No version info available.
> langsmith>=0.1.112: Installed. No version info available.
> numpy<3,>=1.26.2: Installed. No version info available.
> openai-agents: Installed. No version info available.
> openai<2.0.0,>=1.58.1: Installed. No version info available.
> orjson: 3.10.15
> orjson>=3.10.1: Installed. No version info available.
> orjson>=3.9.7: Installed. No version info available.
> packaging: 24.2
> packaging<25,>=23.2: Installed. No version info available.
> pydantic: 2.10.6
> pydantic-settings<3.0.0,>=2.4.0: Installed. No version info available.
> pydantic<3.0.0,>=2.5.2;: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4;: Installed. No version info available.
> pyjwt>=2.9.0: Installed. No version info available.
> pytest: Installed. No version info available.
> python-dotenv: 1.0.1
> PyYAML>=5.3: Installed. No version info available.
> requests: 2.32.3
> requests-toolbelt: 1.0.0
> requests<3,>=2: Installed. No version info available.
> rich: 13.9.4
> SQLAlchemy<3,>=1.4: Installed. No version info available.
> sse-starlette<2.2.0,>=2.1.0: Installed. No version info available.
> sse-starlette>=2: Installed. No version info available.
> starlette>=0.37: Installed. No version info available.
> starlette>=0.38.6: Installed. No version info available.
> structlog<26,>=24.1.0: Installed. No version info available.
> structlog>23: Installed. No version info available.
> tenacity!=8.4.0,<10,>=8.1.0: Installed. No version info available.
> tenacity!=8.4.0,<10.0.0,>=8.1.0: Installed. No version info available.
> tenacity>=8.0.0: Installed. No version info available.
> tiktoken<1,>=0.7: Installed. No version info available.
> truststore>=0.1: Installed. No version info available.
> typing-extensions>=4.7: Installed. No version info available.
> uvicorn>=0.26.0: Installed. No version info available.
> watchfiles>=0.13: Installed. No version info available.
> zstandard: 0.23.0