"Error in plot[cars] : object of type 'closure' is not subsettable\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"/opt/conda/lib/python3.6/site-packages/rpy2/rinterface/__init__.py:146: RRuntimeWarning: Error in plot[cars] : object of type 'closure' is not subsettable\n",