chore(python): add nox session to sort python imports (#324)

Source-Link: googleapis/synthtool@1b71c10
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:00c9d764fd1cd56265f12a5ef4b99a0c9e87cf261018099141e2ca5158890416

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

securitycenter/snippets/noxfile.py

@@ -22,14 +22,14 @@
 
 import nox
 
-
 # WARNING - WARNING - WARNING - WARNING - WARNING
 # WARNING - WARNING - WARNING - WARNING - WARNING
 #           DO NOT EDIT THIS FILE EVER!
 # WARNING - WARNING - WARNING - WARNING - WARNING
 # WARNING - WARNING - WARNING - WARNING - WARNING
 
 BLACK_VERSION = "black==22.3.0"
+ISORT_VERSION = "isort==5.10.1"
 
 # Copy `noxfile_config.py` to your directory and modify it instead.
 
@@ -168,12 +168,33 @@ def lint(session: nox.sessions.Session) -> None:
 
 @nox.session
 def blacken(session: nox.sessions.Session) -> None:
+    """Run black. Format code to uniform standard."""
     session.install(BLACK_VERSION)
     python_files = [path for path in os.listdir(".") if path.endswith(".py")]
 
     session.run("black", *python_files)
 
 
+#
+# format = isort + black
+#
+
+
+@nox.session
+def format(session: nox.sessions.Session) -> None:
+    """
+    Run isort to sort imports. Then run black
+    to format code to uniform standard.
+    """
+    session.install(BLACK_VERSION, ISORT_VERSION)
+    python_files = [path for path in os.listdir(".") if path.endswith(".py")]
+
+    # Use the --fss option to sort imports using strict alphabetical order.
+    # See https://pycqa.github.io/isort/docs/configuration/options.html#force-sort-within-sections
+    session.run("isort", "--fss", *python_files)
+    session.run("black", *python_files)
+
+
 #
 # Sample Tests
 #

securitycenter/snippets/snippets_findings.py

@@ -150,9 +150,10 @@ def list_source(organization_id):
 def create_finding(source_name, finding_id):
     """Creates a new finding."""
     # [START securitycenter_create_finding]
+    import datetime
+
     from google.cloud import securitycenter
     from google.cloud.securitycenter_v1 import Finding
-    import datetime
 
     # Create a new client.
     client = securitycenter.SecurityCenterClient()
@@ -414,8 +415,9 @@ def list_filtered_findings(source_name):
 
 def list_findings_at_time(source_name):
     # [START securitycenter_list_findings_at_time]
+    from datetime import datetime, timedelta
+
     from google.cloud import securitycenter
-    from datetime import timedelta, datetime
 
     # Create a new client.
     client = securitycenter.SecurityCenterClient()
@@ -524,6 +526,7 @@ def group_findings_at_time(source_name):
     i = -1
     # [START securitycenter_group_findings_at_time]
     from datetime import datetime, timedelta
+
     from google.cloud import securitycenter
 
     # Create a client.

securitycenter/snippets/snippets_mute_config_test.py

@@ -18,17 +18,14 @@
 import uuid
 
 from _pytest.capture import CaptureFixture
-
 from google.cloud import securitycenter
 from google.cloud.securitycenter_v1.services.security_center.pagers import (
     ListFindingsPager,
 )
-
 import pytest
 
 import snippets_mute_config
 
-
 # TODO(developer): Replace these variables before running the sample.
 PROJECT_ID = os.environ["GOOGLE_CLOUD_PROJECT"]
 ORGANIZATION_ID = os.environ["GCLOUD_ORGANIZATION"]
@@ -55,7 +52,6 @@ def mute_rule():
 @pytest.fixture
 def finding(capsys: CaptureFixture):
     import snippets_findings
-
     from snippets_findings import create_finding
 
     snippets_findings.create_source(ORGANIZATION_ID)