ai-agents-ollama-base-url-conf-chatollama-from-langchain-ollama-does-not-accept-b-bf033f35

THEN Set the environment variable OLLAMA_HOST to the desired base URL (e.g., http://<host>:<port>) before importing langchain_ollama. This must be done before any imports because the ollama client object is pre-created at import time. Alternatively, set the env var in your shell or system environment.

import os
os.environ["OLLAMA_HOST"] = "http://some_host:11434"
# Must be set before importing langchain_ollama
from langchain_ollama import ChatOllama