【轉】python 修改os環境變數

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舉一個很簡單的例子，如果你發現一個包或者模組，明明是有的，但是會發生這樣的錯誤：

>>> from algorithm import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named algorithm

 

那麼就應該是環境變數出問題了

 

okay，來看怎麼搞

 

>>>>> import sys
>>> sys.path
[‘‘, ‘/usr/lib/python2.7‘, ‘/usr/lib/python2.7/plat-linux2‘, ‘/usr/lib/python2.7/lib-tk‘, ‘/usr/lib/python2.7/lib-old‘, ‘/usr/lib/python2.7/lib-dynload‘, ‘/usr/local/lib/python2.7/dist-packages‘, ‘/usr/lib/python2.7/dist-packages‘, ‘/usr/lib/python2.7/dist-packages/PIL‘, ‘/usr/lib/python2.7/dist-packages/gst-0.10‘, ‘/usr/lib/python2.7/dist-packages/gtk-2.0‘, ‘/usr/lib/pymodules/python2.7‘, ‘/usr/lib/python2.7/dist-packages/ubuntu-sso-client‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-client‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-control-panel‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-couch‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-installer‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol‘]

 

首先，這些顯示出了Python自己的環境變數

 

然後

 

>>> sys.path.append(‘/media/File/Code_DownloadCodeAndSelfCode/PyWorkPlace/xView‘)
>>> sys.path
[‘‘, ‘/usr/lib/python2.7‘, ‘/usr/lib/python2.7/plat-linux2‘, ‘/usr/lib/python2.7/lib-tk‘, ‘/usr/lib/python2.7/lib-old‘, ‘/usr/lib/python2.7/lib-dynload‘, ‘/usr/local/lib/python2.7/dist-packages‘, ‘/usr/lib/python2.7/dist-packages‘, ‘/usr/lib/python2.7/dist-packages/PIL‘, ‘/usr/lib/python2.7/dist-packages/gst-0.10‘, ‘/usr/lib/python2.7/dist-packages/gtk-2.0‘, ‘/usr/lib/pymodules/python2.7‘, ‘/usr/lib/python2.7/dist-packages/ubuntu-sso-client‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-client‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-control-panel‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-couch‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-installer‘, ‘/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol‘, ‘/media/File/Code_DownloadCodeAndSelfCode/PyWorkPlace/xView/emotionAnalyse‘, ‘/media/File/Code_DownloadCodeAndSelfCode/PyWorkPlace/xView‘]
>>> import algorithm

 

這樣，就把自己的algorithm這個包匯入了

 

ok了！

可是這樣有個問題，下次還得設定才行。

那麼就改一下系統變數吧:

$export PYTHONPATH=$PYTHONPATH:/home/YOURSELFPATH

親測有效～

  

【轉】python 修改os環境變數