# import pandas as pd
#
# from visions.relations.relations import InferenceRelation
# from visions.relations.relations_utils import values_are_consecutive
# from visions.types.ordinal import to_ordinal
# from visions.utils import func_nullable_series_contains
#
#
# @func_nullable_series_contains
# def is_ordinal_cat(series: pd.Series, state: dict) -> bool:
#     initial_element = "a"
#     s = series.astype(str)
#     if s.str.len().max() == 1:
#         distinct_values = list(s.str.lower().unique())
#         return initial_element in distinct_values and values_are_consecutive(
#             list(map(ord, distinct_values))
#         )
#     else:
#         return False
#
#
# def categorical_to_ordinal() -> InferenceRelation:
#     from visions.types import Categorical
#
#     return InferenceRelation(
#         Categorical, relationship=is_ordinal_cat, transformer=to_ordinal
#     )