子文件夹引用numpy出错 解决方案

Problem: how to import numpy in subdirectory? Import error of numpy within subfolder.

错误信息：

>>> import numpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/numpy/__init__.py", line 153, in <module>
    from . import add_newdocs
  File "/usr/local/lib/python2.7/dist-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/local/lib/python2.7/dist-packages/numpy/lib/__init__.py", line 18, in <module>
    from .polynomial import *
  File "/usr/local/lib/python2.7/dist-packages/numpy/lib/polynomial.py", line 19, in <module>
    from numpy.linalg import eigvals, lstsq, inv
  File "/usr/local/lib/python2.7/dist-packages/numpy/linalg/__init__.py", line 50, in <module>
    from .linalg import *
  File "/usr/local/lib/python2.7/dist-packages/numpy/linalg/linalg.py", line 29, in <module>
    from numpy.linalg import lapack_lite, _umath_linalg
ImportError: libatlas.so.3gf: cannot open shared object file: No such file or directory

可能原因：
1. 子文件夹下有自己建的numpy.py文件
2. 看最后一行的错误，找不到libatlas.so.3gf. 将其所在文件夹引入/etc/ld.so.conf,缺啥补啥

$ sudo gedit /etc/ld.so.conf
写入/usr/lib/atlas-base
$ sudo ldconfig

see me @ Rachel Zhang :)