arviz-devs/arviz

logger shows duplicated messages

Open

#1100 opened on Mar 2, 2020

View on GitHub
 (0 comments) (0 reactions) (0 assignees)TeX (1,818 stars) (495 forks)batch import
Help Wanted

Description

Describe the bug Logger messages are duplicated (I think it is not always, it may depend on the environment used, I haven't checked too thoroughly though). One example in cookbook

image

and another in refitting notebook

image

To Reproduce Run said notebooks.

Expected behavior Messages appear only once.

Additional context ArviZ 0.7.0

Contributor guide

Tech stack
python
Domain
backenddeveloper experience
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Pythonlogging basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
The issue describes duplicated logger messages in ArviZ notebooks. Likely cause: duplicate handlers added to the root logger. Investigate the logger configuration in arviz/ init .py or arviz/utils.py to find where handlers are added. Ensure only one handler is attached to avoid duplication. The fix may involve using a singleton pattern for the logger or removing extra handlers. The screenshots show examples in cookbook and refitting notebooks, so reproduction may require running those notebooks with the current codebase.