Source code for featuretools.primitives.standard.transform.binary.add_numeric_scalar

from woodwork.column_schema import ColumnSchema

from featuretools.primitives.base.transform_primitive_base import TransformPrimitive


class AddNumericScalar(TransformPrimitive):
    """Adds a scalar to each value in the list.

    Description:
        Given a list of numeric values and a scalar, add
        the given scalar to each value in the list.

    Examples:
        >>> add_numeric_scalar = AddNumericScalar(value=2)
        >>> add_numeric_scalar([3, 1, 2]).tolist()
        [5, 3, 4]
    """

    name = "add_numeric_scalar"
    input_types = [ColumnSchema(semantic_tags={"numeric"})]
    return_type = ColumnSchema(semantic_tags={"numeric"})

    def __init__(self, value=0):
        self.value = value
        self.description_template = "the sum of {{}} and {}".format(self.value)

    def get_function(self):
        def add_scalar(vals):
            return vals + self.value

        return add_scalar

    def generate_name(self, base_feature_names):
        return "%s + %s" % (base_feature_names[0], str(self.value))