python: Reorder imports with isort

Related to T2610

setup.py

@@ -4,7 +4,8 @@
 # See top-level LICENSE file for more information
 
 import os
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def parse_requirements(name=None):

swh/docs/django_settings.py

 from swh.deposit.settings.development import *  # noqa
 import swh.web.settings.development as web
 
-
 # merge some config variables
 ns = globals()
 for var in dir(web):

swh/docs/sphinx/conf.py

@@ -2,10 +2,10 @@
 # -*- coding: utf-8 -*-
 #
 
+import os
 from typing import Dict
 
 import django
-import os
 
 # General information about the project.
 project = "Software Heritage - Development Documentation"
@@ -160,9 +160,10 @@ def register_routingtable_as_label(app, document):
 def setup(app):
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "swh.docs.django_settings")
     django.setup()
-    import pkg_resources  # noqa
     from distutils.version import StrictVersion  # noqa
 
+    import pkg_resources  # noqa
+
     httpdomain = pkg_resources.get_distribution("sphinxcontrib-httpdomain")
     if StrictVersion(httpdomain.version) <= StrictVersion("1.7.0"):
         app.connect("doctree-read", register_routingtable_as_label)