Handling Dictionaries

Cutting the first n levels of a dict

def cut_dict(d: dict, n: int, _output=None) -> dict:
    """Cut dictionary d by n levels.
    Keys that are not deep enough are thrown out.
    If there are same name keys in the n-th level, last key wins.

    Args:
        d (dict): Dictionary to cut
        n (int): Cut by this amount of levels
        _output (None): Do not pass anything here. Internal recursion use.
    """
    if _output is None:
        _output = {}

    if n > 0:  # Need to go deeper
        for value in d.values():
            if isinstance(value, dict):
                cut_dict(value, n - 1, _output)
    else:  # Reached the level we want
        _output.update(d)

    return _output