from typing import Sequence
import pandas as pd
import pandas.api.types as pdt
from visions.relations import IdentityRelation, TypeRelation
from visions.types.type import VisionsBaseType
def _get_relations(cls) -> Sequence[TypeRelation]:
from visions.types import Object
relations = [IdentityRelation(cls, Object)]
return relations
[docs]class String(VisionsBaseType):
"""**String** implementation of :class:`visions.types.type.VisionsBaseType`.
Examples:
>>> x = pd.Series(['rubin', 'carter', 'champion'])
>>> x in visions.String
True
"""
@classmethod
def get_relations(cls) -> Sequence[TypeRelation]:
return _get_relations(cls)
@classmethod
def contains_op(cls, series: pd.Series) -> bool:
# TODO: without the object check this passes string categories... is there a better way?
if not pdt.is_object_dtype(series):
return False
elif series.hasnans:
series = series.dropna()
if series.empty:
return False
return all(type(v) is str for v in series)