ai-agents-import-error-importerror-cannot-import-name-global-handler-from-34d270e3

THEN Before using Ollama (or any LLM), call set_global_handler from llama_index.callbacks.global_handlers with an appropriate eval_mode to set the global handler, then access it via llama_index.global_handler. Alternatively, reinstall from source using 'pip install git+https://github.com/run-llama/llama_index.git' in a fresh virtual environment.

import llama_index
from llama_index.callbacks.global_handlers import set_global_handler

set_global_handler(eval_mode='wandb', param1=value1)  # Use your actual mode and params
handler = llama_index.global_handler