python: Reorder imports with isort

Related to T2610

swh/lister/launchpad/__init__.py

@@ -4,8 +4,8 @@
 
 
 def register():
-    from .models import LaunchpadModel
     from .lister import LaunchpadLister
+    from .models import LaunchpadModel
 
     return {
         "models": [LaunchpadModel],

swh/lister/launchpad/lister.py

@@ -3,17 +3,18 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-from typing import Optional, Dict, List, Union, Tuple, Any
-
-from swh.lister.core.lister_base import ListerBase
-from .models import LaunchpadModel
-
+from datetime import datetime, timedelta
 from itertools import count
+from typing import Any, Dict, List, Optional, Tuple, Union
+
 from launchpadlib.launchpad import Launchpad  # type: ignore
 from lazr.restfulclient.resource import Collection, Entry  # type: ignore
-from datetime import datetime, timedelta
 from sqlalchemy import func
 
+from swh.lister.core.lister_base import ListerBase
+
+from .models import LaunchpadModel
+
 
 class LaunchpadLister(ListerBase):
     MODEL = LaunchpadModel

swh/lister/launchpad/models.py

@@ -2,7 +2,7 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-from sqlalchemy import Column, String, Date
+from sqlalchemy import Column, Date, String
 
 from swh.lister.core.models import ModelBase
 

swh/lister/launchpad/tests/conftest.py

@@ -7,10 +7,12 @@ from datetime import datetime
 import json
 import os
 from unittest.mock import patch
+
 import pytest
+from sqlalchemy.engine import create_engine
+
 from swh.lister import get_lister
 from swh.lister.core.models import initialize
-from sqlalchemy.engine import create_engine
 
 
 @pytest.fixture