chore(python): add nox session to sort python imports (#218)

* chore(python): add nox session to sort python imports

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

* revert change to region tag

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

Author: gcf-owl-bot[bot]

privateca/snippets/conftest.py

@@ -15,7 +15,6 @@
 import uuid
 
 import google.auth
-
 import pytest
 
 from create_ca_pool import create_ca_pool

privateca/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
 #

privateca/snippets/revoke_certificate.py

@@ -16,6 +16,7 @@
 
 import sys
 
+# isort: split
 # [START privateca_revoke_certificate]
 
 import google.cloud.security.privateca_v1 as privateca_v1

privateca/snippets/test_certificate_authorities.py

@@ -28,7 +28,6 @@
 from undelete_certificate_authority import undelete_certificate_authority
 from update_certificate_authority import update_ca_label
 
-
 PROJECT = google.auth.default()[1]
 LOCATION = "europe-west1"
 COMMON_NAME = "COMMON_NAME"

privateca/snippets/test_certificates.py

@@ -20,10 +20,7 @@
 
 from cryptography.hazmat.backends.openssl.backend import backend
 from cryptography.hazmat.primitives.asymmetric import rsa
-
-from cryptography.hazmat.primitives.serialization import Encoding
-from cryptography.hazmat.primitives.serialization import PublicFormat
-
+from cryptography.hazmat.primitives.serialization import Encoding, PublicFormat
 import google.auth
 
 from create_certificate import create_certificate
@@ -32,7 +29,6 @@
 from filter_certificates import filter_certificates
 from revoke_certificate import revoke_certificate
 
-
 PROJECT = google.auth.default()[1]
 LOCATION = "europe-west1"
 COMMON_NAME = "COMMON_NAME"

privateca/snippets/test_crud_certificate_templates.py

@@ -23,7 +23,6 @@
 from list_certificate_templates import list_certificate_templates
 from update_certificate_template import update_certificate_template
 
-
 PROJECT = google.auth.default()[1]
 LOCATION = "europe-west1"
 COMMON_NAME = "COMMON_NAME"