Create python_publish.yml (#1064)

* Create python-publish.yml

Using starter template from the marketplace; made some modifications using the packaging.python.org guide (mainly: add a test deployment workflow).

* Remove tag requirement for test publishes, allowing testing of draft releases

* Replace dash with underscore in filename to match convention

.github/workflows/python_publish.yml

@@ -0,0 +1,68 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This workflow will upload a Python Package using Twine when a release is created
+# For more information see: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Upload Python Package to PyPI and TestPyPI
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: '3.7'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install tox tox-gh-actions
+        pip install coveralls
+        wget https://github.com/protocolbuffers/protobuf/releases/download/v21.6/protoc-21.6-linux-x86_64.zip
+        unzip protoc-21.6-linux-x86_64.zip
+        sudo cp bin/protoc /usr/bin/protoc && sudo chmod 777 /usr/bin/protoc
+        sudo cp -r include/. /usr/include && sudo chmod -R +r /usr/include/google
+        protoc --version
+        sudo apt-get install -y libusb-1.0-0-dev libprotobuf-dev swig
+        pip install build
+    - name: Build package
+      run: python -m build
+    - name: Publish distribution to Test PyPI
+      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
+      with:
+        password: ${{ secrets.TESTPYPI_PUBLISH_PASSWORD }}
+        repository_url: https://test.pypi.org/legacy/
+    - name: Publish package to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_PUBLISH_PASSWORD }}
+        skip_existing: true