Function map_grouping

dash/_grouping.py:126–142

Map a function over all of the scalar values of a grouping, maintaining the grouping structure :param fn: Single-argument function that accepts and returns scalar grouping values :param grouping: The grouping to map the function over :return: A new grouping with the same struct

(fn, grouping)

def map_grouping(fn, grouping):
    """
    Map a function over all of the scalar values of a grouping, maintaining the
    grouping structure

    :param fn: Single-argument function that accepts and returns scalar grouping values
    :param grouping: The grouping to map the function over
    :return: A new grouping with the same structure as input grouping with scalar
        values updated by the input function.
    """
    if isinstance(grouping, (tuple, list)):
        return [map_grouping(fn, g) for g in grouping]

    if isinstance(grouping, dict):
        return AttributeDict({k: map_grouping(fn, g) for k, g in grouping.items()})

    return fn(grouping)


def make_grouping_by_key(schema, source, default=None):