chore: blacken samples noxfile template (#121)

Source-Link: googleapis/synthtool@8b781e1
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:0ccd9f4d714d36e311f60f407199dd460e43a99a125b5ca64b1d75f6e5f8581b

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

privateca/snippets/noxfile.py

@@ -39,31 +39,29 @@
 
 TEST_CONFIG = {
     # You can opt out from the test for specific Python versions.
-    'ignored_versions': [],
-
+    "ignored_versions": [],
     # Old samples are opted out of enforcing Python type hints
     # All new samples should feature them
-    'enforce_type_hints': False,
-
+    "enforce_type_hints": False,
     # An envvar key for determining the project id to use. Change it
     # to 'BUILD_SPECIFIC_GCLOUD_PROJECT' if you want to opt in using a
     # build specific Cloud project. You can also use your own string
     # to use your own Cloud project.
-    'gcloud_project_env': 'GOOGLE_CLOUD_PROJECT',
+    "gcloud_project_env": "GOOGLE_CLOUD_PROJECT",
     # 'gcloud_project_env': 'BUILD_SPECIFIC_GCLOUD_PROJECT',
     # If you need to use a specific version of pip,
     # change pip_version_override to the string representation
     # of the version number, for example, "20.2.4"
     "pip_version_override": None,
     # A dictionary you want to inject into your test. Don't put any
     # secrets here. These values will override predefined values.
-    'envs': {},
+    "envs": {},
 }
 
 
 try:
     # Ensure we can import noxfile_config in the project's directory.
-    sys.path.append('.')
+    sys.path.append(".")
     from noxfile_config import TEST_CONFIG_OVERRIDE
 except ImportError as e:
     print("No user noxfile_config found: detail: {}".format(e))
@@ -78,12 +76,12 @@ def get_pytest_env_vars() -> Dict[str, str]:
     ret = {}
 
     # Override the GCLOUD_PROJECT and the alias.
-    env_key = TEST_CONFIG['gcloud_project_env']
+    env_key = TEST_CONFIG["gcloud_project_env"]
     # This should error out if not set.
-    ret['GOOGLE_CLOUD_PROJECT'] = os.environ[env_key]
+    ret["GOOGLE_CLOUD_PROJECT"] = os.environ[env_key]
 
     # Apply user supplied envs.
-    ret.update(TEST_CONFIG['envs'])
+    ret.update(TEST_CONFIG["envs"])
     return ret
 
 
@@ -92,11 +90,14 @@ def get_pytest_env_vars() -> Dict[str, str]:
 ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9"]
 
 # Any default versions that should be ignored.
-IGNORED_VERSIONS = TEST_CONFIG['ignored_versions']
+IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]
 
 TESTED_VERSIONS = sorted([v for v in ALL_VERSIONS if v not in IGNORED_VERSIONS])
 
-INSTALL_LIBRARY_FROM_SOURCE = os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False) in ("True", "true")
+INSTALL_LIBRARY_FROM_SOURCE = os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False) in (
+    "True",
+    "true",
+)
 #
 # Style Checks
 #
@@ -141,7 +142,7 @@ def _determine_local_import_names(start_dir: str) -> List[str]:
 
 @nox.session
 def lint(session: nox.sessions.Session) -> None:
-    if not TEST_CONFIG['enforce_type_hints']:
+    if not TEST_CONFIG["enforce_type_hints"]:
         session.install("flake8", "flake8-import-order")
     else:
         session.install("flake8", "flake8-import-order", "flake8-annotations")
@@ -150,9 +151,11 @@ def lint(session: nox.sessions.Session) -> None:
     args = FLAKE8_COMMON_ARGS + [
         "--application-import-names",
         ",".join(local_names),
-        "."
+        ".",
     ]
     session.run("flake8", *args)
+
+
 #
 # Black
 #
@@ -165,6 +168,7 @@ def blacken(session: nox.sessions.Session) -> None:
 
     session.run("black", *python_files)
 
+
 #
 # Sample Tests
 #
@@ -173,7 +177,9 @@ def blacken(session: nox.sessions.Session) -> None:
 PYTEST_COMMON_ARGS = ["--junitxml=sponge_log.xml"]
 
 
-def _session_tests(session: nox.sessions.Session, post_install: Callable = None) -> None:
+def _session_tests(
+    session: nox.sessions.Session, post_install: Callable = None
+) -> None:
     if TEST_CONFIG["pip_version_override"]:
         pip_version = TEST_CONFIG["pip_version_override"]
         session.install(f"pip=={pip_version}")
@@ -203,7 +209,7 @@ def _session_tests(session: nox.sessions.Session, post_install: Callable = None)
         # on travis where slow and flaky tests are excluded.
         # See http://doc.pytest.org/en/latest/_modules/_pytest/main.html
         success_codes=[0, 5],
-        env=get_pytest_env_vars()
+        env=get_pytest_env_vars(),
     )
 
 
@@ -213,9 +219,9 @@ def py(session: nox.sessions.Session) -> None:
     if session.python in TESTED_VERSIONS:
         _session_tests(session)
     else:
-        session.skip("SKIPPED: {} tests are disabled for this sample.".format(
-            session.python
-        ))
+        session.skip(
+            "SKIPPED: {} tests are disabled for this sample.".format(session.python)
+        )
 
 
 #