@classmethod
def _path_to_value(cls, path, parent_dict):
    """Return a value from a dictionary at the given path"""
    keys = cls._path_to_keys(path)
    child_dict = parent_dict
    for key in keys[:-1]:
        child_dict = child_dict.get(key)
        if child_dict is None:
            return
    return child_dict.get(keys[-1])
