fix: require python 3.7+ (#107)

* chore(python): drop python 3.6

Source-Link: googleapis/synthtool@4f89b13
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c

* require python 3.7+ in setup.py

* remove python 3.6 sample configs

* exclude templated readme

* remove python 3.6 from noxfile

* remove require check for python 3.6

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:81ed5ecdfc7cac5b699ba4537376f3563f6f04122c4ec9e735d3b3dc1d43dd32
-# created: 2022-05-05T22:08:23.383410683Z
+  digest: sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c
+# created: 2022-07-05T18:31:20.838186805Z

.github/sync-repo-settings.yaml

@@ -10,7 +10,6 @@ branchProtectionRules:
     - 'cla/google'
     - 'OwlBot Post Processor'
     - 'lint'
-    - 'unit (3.6)'
     - 'unit (3.7)'
     - 'unit (3.8)'
     - 'unit (3.9)'

.github/workflows/unittest.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        python: ['3.7', '3.8', '3.9', '3.10']
     steps:
     - name: Checkout
       uses: actions/checkout@v3

.kokoro/continuous/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "prerelease_deps"
+}

.kokoro/presubmit/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "prerelease_deps"
+}

.kokoro/test-samples-impl.sh

@@ -33,7 +33,7 @@ export PYTHONUNBUFFERED=1
 env | grep KOKORO
 
 # Install nox
-python3.6 -m pip install --upgrade --quiet nox
+python3.9 -m pip install --upgrade --quiet nox
 
 # Use secrets acessor service account to get secrets
 if [[ -f "${KOKORO_GFILE_DIR}/secrets_viewer_service_account.json" ]]; then
@@ -76,7 +76,7 @@ for file in samples/**/requirements.txt; do
     echo "------------------------------------------------------------"
 
     # Use nox to execute the tests for the project.
-    python3.6 -m nox -s "$RUN_TESTS_SESSION"
+    python3.9 -m nox -s "$RUN_TESTS_SESSION"
     EXIT=$?
 
     # If this is a periodic build, send the test log to the FlakyBot.

README.rst

@@ -4,4 +4,5 @@ Python Test Utils
 
 This is a collection of common tools used in system tests of Python client libraries for Google APIs.
 
-We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests. This package is added to each `nox` session as described in each repository's ``noxfile.py``.
+We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests. This package is added to each `nox` session as described in each repository's ``noxfile.py``.
+

noxfile.py

@@ -90,7 +90,7 @@ def mypy(session):
     session.run("mypy", "test_utils/", "tests/")
 
 
-@nox.session(python=["3.6", "3.7", "3.8", "3.9", "3.10"])
+@nox.session(python=["3.7", "3.8", "3.9", "3.10"])
 def unit(session):
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"

owlbot.py

@@ -31,11 +31,12 @@
         "MANIFEST.in",  # no 'google' package
         "noxfile.py",  # noxfile is non-standard
         "docs/**/*",  # no docs to publish
-        ".kokoro/docs/",  
+        ".kokoro/docs/",
         ".kokoro/publish-docs.sh",
         "CONTRIBUTING.rst",
         "renovate.json", # no bundle, ignore test resources
         ".github/workflows/docs.yml", # no docs to publish
+	"README.rst",
     ],
 )
 

scripts/readme-gen/templates/install_deps.tmpl.rst

@@ -12,7 +12,7 @@ Install Dependencies
    .. _Python Development Environment Setup Guide:
        https://cloud.google.com/python/setup
 
-#. Create a virtualenv. Samples are compatible with Python 3.6+.
+#. Create a virtualenv. Samples are compatible with Python 3.7+.
 
     .. code-block:: bash
 

setup.py

@@ -41,13 +41,12 @@
     platforms="Posix; MacOS X; Windows",
     include_package_data=True,
     install_requires=("google-auth >= 0.4.0", "click>=7.0.0", "packaging>=19.0"),
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",