Drop Python 3.8 #1142

	name: visualization with hiplot

	# TODO(fusawa-yugo) Change schedule to run daily once the problem is resolved
	on:
	schedule:
	- cron: '0 15 * * 1'
	pull_request:
	paths:
	- 'hiplot/**'
	- '.github/workflows/hiplot.yml'
	workflow_dispatch:

	jobs:
	examples:
	if: (github.event_name == 'schedule' && github.repository == 'optuna/optuna-examples') \|\| (github.event_name != 'schedule')
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ['3.9', '3.10', '3.11', '3.12']

	steps:
	- uses: actions/checkout@v4
	- name: setup-python${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install (Python)
	run: \|
	python -m pip install --upgrade pip
	pip install --progress-bar off -U setuptools
	pip install git+https://github.com/optuna/optuna.git
	python -c 'import optuna'

	pip install -r hiplot/requirements.txt
	- name: Run examples
	run: \|
	jupyter nbconvert --to notebook --execute hiplot/plot_study.ipynb
	env:
	OMP_NUM_THREADS: 1

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