python中easy_install 卸载已经安装的包

用easy_install安装python的包很方便，在mac下有时还必须要用macports来安装python的包，这个时候就会产生冲突。

我保留macports的python版本，要看用的是哪个python版本，可以用which命令

which python

/opt/local/bin/python

说明用的是macports安装的python，如果显示的是/usr 下面的，说明是mac自己安装的版本。

产生冲突之后，怎么解决呢？

根据setuptools官方网站的说明：
http://peak.telecommunity.com/DevCenter/EasyInstall#uninstalling-packages

Uninstalling Packages

If you have replaced a package with another version, then you can just delete the package(s) you don't need by deleting the PackageName-versioninfo.egg file or directory (found in the installation directory).

If you want to delete the currently installed version of a package (or all versions of a package), you should first run:

easy_install -mxN PackageName

This will ensure that Python doesn't continue to search for a package you're planning to remove. After you've done this, you can safely delete the .egg files or directories, along with any scripts you wish to remove.

easy_install -mxN networkx

然后根据冲突的提示，卸载掉networkx对应的egg

最后，不要忘记重启命令行。