Check for an active python environment without initialization.
If none initialized, FALSE is returned. If an initialized environment
is found, the env name based on reticulate::conda_list() will be returned.
The following options will also be updated with information about the active
environment:
"giotto.py_active_env"(envname)"giotto.py_active_ver"(python version)"giotto.py_active_path"(path to python)