Python configuration
python_info()Returns a reticulate::py_config object, which also has the
python_info class. It is a named list of values.
If reticulate is not installed or Python is not configured,
then it return a python_info object that is a character vector, and
it does not have a py_config class.
if (FALSE) {
python_info()
session_info(info = "all")
}