[torch] Return a model even if callback has no best model path #4424

	name: Flake8 & Docformat

	on: [push, pull_request]

	jobs:
	flake8:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.8
	uses: actions/setup-python@v4
	with:
	python-version: '3.8'
	- name: Install dependencies
	run: \|
	python -m pip install -U pip
	pip install ruff
	pip install docformatter[tomli]==1.5.0
	- name: Ruff (Flake8)
	run: \|
	ruff src
	- name: DocFormatter
	run: \|
	docformatter -r src/gluonts

Provide feedback