python unipath：当前文件目录（ancestor）的路径不输出(python unipath: path to current file directory (ancestor) outputs nothing)

 我一直在努力学习python-unipath ，并且一直在掌握基本的命令。 然而，我一直被这个问题困扰。 所以，我想获得当前文件的祖先（2）。 所以，在Python解释器上，我做了这样的事情： 
 
Python 2.7.3 (default, Jan  2 2013, 13:56:14) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from unipath import Path
>>> ORM_ROOT = Path("/home/foo/lump/foobar/turf/orm/unipath_try.py").ancestor(2)
>>> ORM_ROOT
Path('/home/foo/lump/foobar/turf')
 
 ..这是正确的，正是我想要的。 现在，我把它包装在一个文件中，如下所示： 
 
# -*- coding: utf-8 -*-
# unipath_try.py

from unipath import Path
ORM_ROOT = Path(__file__).ancestor(2)
print ORM_ROOT
 
 当我运行这个使用python unipath_try.py我得不到输出！ 没有导入错误。 我完全困惑，为什么会这样 - 可能真的很愚蠢。 希望任何帮助/方向在这:( 

I have been trying to learn python-unipath and have been getting to grips with basic commands. However, I have been stumped by this issue. So, I would like to get the ancestor(2) of the current file. So, on the python interpretter, I do something like this:
 
Python 2.7.3 (default, Jan  2 2013, 13:56:14) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from unipath import Path
>>> ORM_ROOT = Path("/home/foo/lump/foobar/turf/orm/unipath_try.py").ancestor(2)
>>> ORM_ROOT
Path('/home/foo/lump/foobar/turf')
 
..which is correct and exactly what I want. Now, I wrap this in a file like so:
 
# -*- coding: utf-8 -*-
# unipath_try.py

from unipath import Path
ORM_ROOT = Path(__file__).ancestor(2)
print ORM_ROOT
 
when I run this using python unipath_try.py I get no output! No import errors either. I am completely baffled why this is - probably something really stupid. Would appreciate any help/direction on this :(

原文：https://stackoverflow.com/questions/18444093