ImportError: No module named sysconfig

使用pip下载包时提示以下错误：

Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.6/site-packages/pkg_resources/__init__.py", line 959, in <module>
    class Environment:
  File "/usr/lib/python2.6/site-packages/pkg_resources/__init__.py", line 963, in Environment
    self, search_path=None, platform=get_supported_platform(),
  File "/usr/lib/python2.6/site-packages/pkg_resources/__init__.py", line 190, in get_supported_platform
    plat = get_build_platform()
  File "/usr/lib/python2.6/site-packages/pkg_resources/__init__.py", line 393, in get_build_platform
    from sysconfig import get_platform
ImportError: No module named sysconfig

执行以下命令完美解决：

cd /usr/lib/python2.6/site-packages
sudo rm -rf pkg_resources