def __init__(self, family, path_to_data='.'):
    self.family = family
    self.db_name = os.path.join(path_to_data, (family + '.nb.db'))
def __init__(self, family, path_to_data='.'):
    self.family = family
    self.db_name = os.path.join(path_to_data, (family + '.nb.db'))