Source code for featuretools.primitives.standard.transform.datetime.day

from woodwork.column_schema import ColumnSchema
from woodwork.logical_types import Datetime, Ordinal

from featuretools.primitives.base import TransformPrimitive


class Day(TransformPrimitive):
    """Determines the day of the month from a datetime.

    Examples:
        >>> from datetime import datetime
        >>> dates = [datetime(2019, 3, 1),
        ...          datetime(2019, 3, 3),
        ...          datetime(2019, 3, 31)]
        >>> day = Day()
        >>> day(dates).tolist()
        [1, 3, 31]
    """

    name = "day"
    input_types = [ColumnSchema(logical_type=Datetime)]
    return_type = ColumnSchema(
        logical_type=Ordinal(order=list(range(1, 32))),
        semantic_tags={"category"},
    )

    description_template = "the day of the month of {}"

    def get_function(self):
        def day(vals):
            return vals.dt.day

        return day