pytorch/ignite

Sync trainer state with evaluators

Open

#2,733 opened on Oct 6, 2022

View on GitHub
 (10 comments) (0 reactions) (0 assignees)Python (4,313 stars) (602 forks)batch import
Hacktoberfestenhancementhelp wantedneeds-discussion

Description

🚀 Feature

There can be use-cases when we would like to get trainer's epoch/iteration or/and other items from trainer.state. Let's propose an API such that we could get easily trainer's state from evaluator.

Context : https://discuss.pytorch.org/t/get-current-epoch-inside-process-function-of-evaluator/162926

Contributor guide

Tech stack
pythonpytorch
Domain
machine learning
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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.
clear
Prerequisites
PyTorch Ignite basicsUnderstanding of trainer and evaluator
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the trainer.state object in ignite/engine/engine.py and the evaluator's process function. Review the discussion at https://discuss.pytorch.org/t/get current epoch inside process function of evaluator/162926 to understand the use case. Propose an API design that allows evaluators to access trainer state, ensuring backward compatibility.