[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

tests/conftest.py

@@ -48,30 +48,40 @@ class TestDbBackend(Enum):
 
 @pytest.fixture(scope='module', autouse=True)
 def log_module_open_fds(request):
-    import psutil, os
+    import os
+
+    import psutil
+
     def list_open_fds():
         process = psutil.Process(os.getpid())
         return process.open_files()
+
     open_fds = list_open_fds()
     test_name = request.node.name
 
     msg = f'{test_name} open fds: {len(open_fds)}\n'
-    with (Path.cwd() / "module_open_fds.log").open("a") as file_handler:
+    with (Path.cwd() / 'module_open_fds.log').open('a') as file_handler:
         file_handler.write(msg)
 
+
 @pytest.fixture(scope='function', autouse=True)
 def log_function_open_fds(request):
-    import psutil, os
+    import os
+
+    import psutil
+
     def list_open_fds():
         process = psutil.Process(os.getpid())
         return process.open_files()
+
     open_fds = list_open_fds()
     test_name = request.node.name
 
     msg = f'{test_name} open fds: {len(open_fds)}\n'
-    with (Path.cwd() / "function_open_fds.log").open("a") as file_handler:
+    with (Path.cwd() / 'function_open_fds.log').open('a') as file_handler:
         file_handler.write(msg)
 
+
 def pytest_collection_modifyitems(items, config):
     """Automatically generate markers for certain tests.