异常信息如下：
ImportError: <module 'setuptools.dist' from '/home/qiulp/Downloads/setuptools-0.6c8/setuptools/dist.pyc'> has no 'check_packages' attribute
解决办法：
curl -O http://python-distribute.org/distribute_setup.py
sudo python distribute_setup.py
异常信息如下：
ImportError: <module 'setuptools.dist' from '/home/qiulp/Downloads/setuptools-0.6c8/setuptools/dist.pyc'> has no 'check_packages' attribute
解决办法：
curl -O http://python-distribute.org/distribute_setup.py
sudo python distribute_setup.py