fix(python): drop python 3.6 (#1447)

Author: parthea

synthtool/gcp/common.py

@@ -238,7 +238,7 @@ def py_library(self, **kwargs) -> Path:
         if "default_python_version" not in kwargs:
             kwargs["default_python_version"] = "3.8"
         if "unit_test_python_versions" not in kwargs:
-            kwargs["unit_test_python_versions"] = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+            kwargs["unit_test_python_versions"] = ["3.7", "3.8", "3.9", "3.10"]
 
         if "system_test_python_versions" not in kwargs:
             kwargs["system_test_python_versions"] = ["3.8"]

synthtool/gcp/templates/python_library/.kokoro/samples/python3.6/common.cfg

@@ -0,0 +1,103 @@
+Python Client for {{ metadata['repo']['name_pretty'] }} API
+======================{% for i in range(metadata['repo']['name_pretty']|length) %}={% endfor %}
+
+|{{ metadata['repo']['release_level'] }}| |pypi| |versions|
+
+`{{ metadata['repo']['name_pretty'] }} API`_: {% if metadata['repo']['api_description'] %}{{metadata['repo']['api_description'] }}{% endif %}
+
+- `Client Library Documentation`_
+- `Product Documentation`_
+
+.. |{{ metadata['repo']['release_level'] }}| image:: https://img.shields.io/badge/support-{{ metadata['repo']['release_level'] }}-{% if metadata['repo']['release_level'] == 'stable' %}gold{% else %}orange{% endif %}.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/main/README.rst#stability-levels
+.. |pypi| image:: https://img.shields.io/pypi/v/{{ metadata['repo']['distribution_name'] }}.svg
+   :target: https://pypi.org/project/{{ metadata['repo']['distribution_name'] }}/
+.. |versions| image:: https://img.shields.io/pypi/pyversions/{{ metadata['repo']['distribution_name'] }}.svg
+   :target: https://pypi.org/project/{{ metadata['repo']['distribution_name'] }}/
+.. _{{ metadata['repo']['name_pretty'] }} API: {{ metadata['repo']['product_documentation'] }}
+.. _Client Library Documentation: https://cloud.google.com/python/docs/reference/{{ metadata['repo']['api_shortname'] }}/latest
+.. _Product Documentation:  {{ metadata['repo']['product_documentation'] }}
+
+Quick Start
+-----------
+
+In order to use this library, you first need to go through the following steps:
+
+1. `Select or create a Cloud Platform project.`_
+2. `Enable billing for your project.`_
+3. `Enable the {{ metadata['repo']['name_pretty'] }} API.`_
+4. `Setup Authentication.`_
+
+.. _Select or create a Cloud Platform project.: https://console.cloud.google.com/project
+.. _Enable billing for your project.: https://cloud.google.com/billing/docs/how-to/modify-project#enable_billing_for_a_project
+.. _Enable the {{ metadata['repo']['name_pretty'] }} API.:  {{ metadata['repo']['product_documentation'] }}
+.. _Setup Authentication.: https://googleapis.dev/python/google-api-core/latest/auth.html
+
+Installation
+~~~~~~~~~~~~
+
+Install this library in a `virtualenv`_ using pip. `virtualenv`_ is a tool to
+create isolated Python environments. The basic problem it addresses is one of
+dependencies and versions, and indirectly permissions.
+
+With `virtualenv`_, it's possible to install this library without needing system
+install permissions, and without clashing with the installed system
+dependencies.
+
+.. _`virtualenv`: https://virtualenv.pypa.io/en/latest/
+
+
+Code samples and snippets
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Code samples and snippets live in the `samples/` folder.
+
+
+Supported Python Versions
+^^^^^^^^^^^^^^^^^^^^^^^^^
+Our client libraries are compatible with all current [active](https://devguide.python.org/devcycle/#in-development-main-branch) and [maintenance](https://devguide.python.org/devcycle/#maintenance-branches) versions of
+Python.
+
+Python >= 3.7
+
+Unsupported Python Versions
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Python <= 3.6
+
+If you are using an [end-of-life](https://devguide.python.org/devcycle/#end-of-life-branches)
+version of Python, we recommend that you update as soon as possible to an actively supported version.
+
+
+Mac/Linux
+^^^^^^^^^
+
+.. code-block:: console
+
+    pip install virtualenv
+    virtualenv <your-env>
+    source <your-env>/bin/activate
+    <your-env>/bin/pip install {{ metadata['repo']['distribution_name'] }}
+
+
+Windows
+^^^^^^^
+
+.. code-block:: console
+
+    pip install virtualenv
+    virtualenv <your-env>
+    <your-env>\Scripts\activate
+    <your-env>\Scripts\pip.exe install {{ metadata['repo']['distribution_name'] }}
+
+Next Steps
+~~~~~~~~~~
+
+-  Read the `Client Library Documentation`_ for {{ metadata['repo']['name_pretty'] }} API
+   to see other available methods on the client.
+-  Read the `{{ metadata['repo']['name_pretty'] }} API Product documentation`_ to learn
+   more about the product and see How-to Guides.
+-  View this `README`_ to see the full list of Cloud
+   APIs that we cover.
+
+.. _{{ metadata['repo']['name_pretty'] }} API Product documentation:  {{ metadata['repo']['product_documentation'] }}
+.. _README: https://github.com/googleapis/google-cloud-python/blob/main/README.rst

synthtool/gcp/templates/python_library/.kokoro/samples/python3.6/continuous.cfg

@@ -346,28 +346,11 @@ def docfx(session):
 def prerelease_deps(session):
     """Run all tests with prerelease versions of dependencies installed."""
 
-    prerel_deps = [
-        "protobuf",
-        "googleapis-common-protos",
-        "google-auth",
-        "grpcio",
-        "grpcio-status",
-        "google-api-core",
-        "proto-plus",
-        # dependencies of google-auth
-        "cryptography",
-        "pyasn1",
-    ]
-
-    for dep in prerel_deps:
-        session.install("--pre", "--no-deps", "--upgrade", dep)
-
-    # Remaining dependencies
-    other_deps = ["requests"]
-    session.install(*other_deps)
-
+    # Install all dependencies
+    session.install("-e", ".[all, tests, tracing]")
     session.install(*UNIT_TEST_STANDARD_DEPENDENCIES)
-    session.install(*SYSTEM_TEST_STANDARD_DEPENDENCIES)
+    system_deps_all = SYSTEM_TEST_STANDARD_DEPENDENCIES + SYSTEM_TEST_EXTERNAL_DEPENDENCIES + SYSTEM_TEST_EXTRAS
+    session.install(*system_deps_all)
 
     # Because we test minimum dependency versions on the minimum Python
     # version, the first version we test with in the unit tests sessions has a
@@ -381,19 +364,44 @@ def prerelease_deps(session):
         constraints_text = constraints_file.read()
 
     # Ignore leading whitespace and comment lines.
-    deps = [
+    constraints_deps = [
         match.group(1)
         for match in re.finditer(
             r"^\s*(\S+)(?===\S+)", constraints_text, flags=re.MULTILINE
         )
     ]
 
-    # Don't overwrite prerelease packages.
-    deps = [dep for dep in deps if dep not in prerel_deps]
-    # We use --no-deps to ensure that pre-release versions aren't overwritten
-    # by the version ranges in setup.py.
-    session.install(*deps)
-    session.install("--no-deps", "-e", ".[all]")
+    session.install(*constraints_deps)
+
+    if os.path.exists("samples/snippets/requirements.txt"):
+        session.install("-r", "samples/snippets/requirements.txt")
+
+    if os.path.exists("samples/snippets/requirements-test.txt"):
+        session.install("-r", "samples/snippets/requirements-test.txt")
+
+    prerel_deps = [
+        "protobuf",
+        # dependency of grpc
+        "six",
+        "googleapis-common-protos",
+        "grpcio",
+        "grpcio-status",
+        "google-api-core",
+        "proto-plus",
+        "google-cloud-testutils",
+        # dependencies of google-cloud-testutils"
+        "click",
+    ]
+
+    for dep in prerel_deps:
+        session.install("--pre", "--no-deps", "--upgrade", dep)
+
+    # Remaining dependencies
+    other_deps = [
+        "requests",
+        "google-auth",
+    ]
+    session.install(*other_deps)
 
     # Print out prerelease package versions
     session.run(
@@ -402,5 +410,16 @@ def prerelease_deps(session):
     session.run("python", "-c", "import grpc; print(grpc.__version__)")
 
     session.run("py.test", "tests/unit")
-    session.run("py.test", "tests/system")
-    session.run("py.test", "samples/snippets")
+
+    system_test_path = os.path.join("tests", "system.py")
+    system_test_folder_path = os.path.join("tests", "system")
+
+    # Only run system tests if found.
+    if os.path.exists(system_test_path) or os.path.exists(system_test_folder_path):
+        session.run("py.test", "tests/system")
+
+    snippets_test_path = os.path.join("samples", "snippets")
+
+    # Only run samples tests if found.
+    if os.path.exists(snippets_test_path):
+        session.run("py.test", "samples/snippets")

synthtool/gcp/templates/python_library/.kokoro/samples/python3.6/periodic-head.cfg

@@ -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
 

synthtool/gcp/templates/python_library/.kokoro/samples/python3.6/periodic.cfg

@@ -1 +1 @@
-google-cloud-aiplatform==1.15.0
+google-cloud-aiplatform==1.15.0

synthtool/gcp/templates/python_library/.kokoro/samples/python3.6/presubmit.cfg

@@ -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
 

synthtool/gcp/templates/python_library/README.rst

@@ -89,7 +89,7 @@ def get_pytest_env_vars() -> Dict[str, str]:
 
 # DO NOT EDIT - automatically generated.
 # All versions used to test samples.
-ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+ALL_VERSIONS = ["3.7", "3.8", "3.9", "3.10"]
 
 # Any default versions that should be ignored.
 IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]

synthtool/gcp/templates/python_library/noxfile.py.j2

@@ -88,7 +88,6 @@
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
@@ -101,7 +100,7 @@
     namespace_packages=namespaces,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     scripts=["scripts/fixup_keywords.py"],
     include_package_data=True,
     zip_safe=False,

synthtool/gcp/templates/python_library/scripts/readme-gen/templates/install_deps.tmpl.rst

@@ -88,7 +88,6 @@
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
@@ -101,7 +100,7 @@
     namespace_packages=namespaces,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     scripts=["scripts/fixup_keywords.py"],
     include_package_data=True,
     zip_safe=False,