我正在尝试为Mac OS Lion附带的python 2.7.1安装numpy和scipy。我尝试按照numpy and scipy for preinstalled python 2.6.7 on mac OS Lion 3上的说明操作。安装gfortran后，sudo easy_install-2.7 pip工作得很好。但是当我尝试sudo pip2.7 install numpy时，我收到以下错误
Wheel installs require setuptools >= 0.8 for dist-info support.
pip's wheel support requires setuptools >= 0.8 for dist-info support.
Storing debug log for failure in /Users/MYUSERNAME/Library/Logs/pip.log
我记得当我尝试为Python 2.6安装它时，我没有遇到这个问题。有什么建议可以解决这个问题吗？