[python] Validate pyproject.toml and fix the pyproject.toml version constraint format #353

	name: Python Client (Echo API)

	on:
	pull_request:
	paths:
	- samples/client/echo_api/python/**
	- samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/**
	- .github/workflows/samples-python-client-echo-api.yaml
	jobs:
	validate-pyproject-toml:
	name: Validate pyproject.toml
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: "3.13"
	- name: Install validator
	run: pip install 'validate-pyproject[all]'
	- name: Validate
	run: validate-pyproject samples/client/echo_api/python/pyproject.toml
	build:
	name: Test Python client
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	sample:
	# clients
	- samples/client/echo_api/python
	- samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent
	python-version:
	- "3.9"
	- "3.10"
	- "3.11"
	- "3.12"
	- "3.13"
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Setup node.js
	uses: actions/setup-node@v4
	- name: Run echo server
	run: \|
	git clone https://github.com/wing328/http-echo-server -b openapi-generator-test-server
	(cd http-echo-server && npm install && npm start &)
	- name: Install
	working-directory: ${{ matrix.sample }}
	run: \|
	pip install -r requirements.txt
	pip install -r test-requirements.txt

	- name: Test
	working-directory: ${{ matrix.sample }}
	run: python -m unittest discover

	- name: mypy
	working-directory: ${{ matrix.sample }}
	run: python -m mypy

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