获取当前目录，上级目录，上上级目录

import os

print('当前目录')
print(os.getcwd())

print('上级目录')
print(os.path.dirname(file_path))

print('上上级目录‘)
print(os.path.dirname(os.path.dirname(file_path)))

参考：
[1] https://www.jianshu.com/p/dde02a88a5c1