# -*- coding: UTF-8 -*-
# 作者：huanhuilong
# 标题：Python 模块导入3
# 描述：相对目录导入


if __name__ == '__main__':
    print(
        '''
Absolute imports may use either the import <> or from <> import <> syntax, but relative imports may only use the second form; the reason for this is that:
```import XXX.YYY.ZZZ```
should expose `XXX.YYY.ZZZ` as a usable expression, but .moduleY is not a valid expression.
    '''
    )
