alifestd_mark_prev_sibling_id_asexual

alifestd_mark_prev_sibling_id_asexual(phylogeny_df: DataFrame, mutate: bool = False, *, mark_as: str = 'prev_sibling_id') → DataFrame

Add column prev_sibling_id, the next-lowest id sharing the same parent.

The output column name can be changed via the mark_as parameter.

If no such sibling exists, marks own id.

A topological sort will be applied if phylogeny_df is not topologically sorted. Dataframe reindexing (e.g., df.index) may be applied.

Input dataframe is not mutated by this operation unless mutate set True. If mutate set True, operation does not occur in place; still use return value to get transformed phylogeny dataframe.