在安裝numpy庫時，出現了這樣的錯誤：
安裝命令：
easy_install numpy錯誤：
MacdeMacBook-Pro-3:python mac$ easy_install numpy
error: can't create or remove files in install directory
The following error occurred while trying to add or remove files in the
installation directory:
[Errno 13] Permission denied: '/Library/Python/2.7/site-packages/test-easy-install-785.write-test'
什麼原因呢？通過分析錯誤提示，"[Errno 13] Permission denied:"原來是許可權問題，需要超級管理員許可權：
sudo easy_install numpy安裝成功：
MacdeMacBook-Pro-3:python mac$ sudo easy_install numpy
Password:
Searching for numpy
Best match: numpy 1.6.2
Adding numpy 1.6.2 to easy-install.pth file
Using /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python
Processing dependencies for numpy
Finished processing dependencies for numpy
MacdeMacBook-Pro-3:python mac$