
    dict_to_df,
    perturbation_stats,
    sep_dicts,
)
from vflow.vfunc import AsyncVfunc, Vfunc

FILTER_PREV_KEY = &#34;__filter_prev__&#34;


class Vset:
    def __init__(
        self,
        name: str,
        vfuncs,
        vfunc_keys: list = None,
        is_async: bool = False,
        output_matching: bool = False,
        lazy: bool = False,
        cache_dir: str = None,
        tracking_dir: str = None,
    ):
        &#34;&#34;&#34;
        Parameters
        ----------
        name: str
  