make pylint happier

Author: slayoo

examples/widgets_playground.ipynb

@@ -15,7 +15,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import subprocess, sys\n",
+    "import sys\n",
+    "import subprocess\n",
     "\n",
     "if 'google.colab' in sys.modules:\n",
     "    packages = ('git+https://github.com/open-atmos/PyPartMC.git',)\n",