I wanted to get extra debugging output from a Python script that I was running, but one of my imports seemed to mess things up and the logger level was 20 (info) instead of debug.

import logging
from llama_index import GPTSimpleVectorIndex, MockLLMPredictor, MockEmbedding, QuestionAnswerPrompt
logging.basicConfig(level=logging.DEBUG)
logging.debug('This is a test.')

As it turns out, there was already a call to basicConfig in github_repository_reader.py which llama_index loaded at some point, and the Python documentation says: "As it’s intended as a one-off simple configuration facility, only the first call will actually do anything: subsequent calls are effectively no-ops."

So this is what I needed to do instead:

logging.getLogger().setLevel(logging.DEBUG)