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

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

demo.ipynb

@@ -6,7 +6,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import abc\n",
     "%load_ext autoreload\n",
     "%autoreload 2"
    ]
@@ -19,11 +18,14 @@
    "source": [
     "import inspect\n",
     "from unittest.mock import MagicMock\n",
+    "\n",
     "from weldx_widgets.widget_base import WidgetBase as base\n",
     "\n",
+    "\n",
     "def all_subclasses(cls):\n",
     "    return set(cls.__subclasses__()).union(\n",
-    "        [s for c in cls.__subclasses__() for s in all_subclasses(c)])"
+    "        [s for c in cls.__subclasses__() for s in all_subclasses(c)]\n",
+    "    )"
    ]
   },
   {
@@ -44,9 +46,13 @@
     "    for k, v in args.parameters.items():\n",
     "        if k == \"self\":\n",
     "            continue\n",
-    "        if k!= \"kwargs\" and v.POSITIONAL_OR_KEYWORD and v.default is inspect.Parameter.empty:\n",
+    "        if (\n",
+    "            k != \"kwargs\"\n",
+    "            and v.POSITIONAL_OR_KEYWORD\n",
+    "            and v.default is inspect.Parameter.empty\n",
+    "        ):\n",
     "            _mock_args[k] = MagicMock()\n",
-    "            print(\"mocked \",k,v)\n",
+    "            print(\"mocked \", k, v)\n",
     "        try:\n",
     "            all_widgets.append(cls(**_mock_args))\n",
     "        except TypeError as te:\n",