我在MacOS X Leopard 10.6上也遇到了同样的问题。

解决方案是确保你正在调用MacPorts Python:

sudo port install python26
sudo port install python_select
sudo python_select python26
sudo port install py26-mysql

希望这能有所帮助。

在尝试卸载随时间安装的许多随机Python包时遇到了这个问题。

利用这篇文章中的信息，我得出了以下结论:

cat package_list | xargs -n1 sudo pip uninstall -y

从virtualenv中的pip冻结中清理package_list (awk)。

删除几乎所有Python包:

yolk -l | cut -f 1 -d " " | grep -v "setuptools|pip|ETC.." | xargs -n1 pip uninstall -y

要卸载.egg，您需要rm -rf egg(它可能是一个目录)，并从site-packages/easy-install.pth中删除匹配的行

try

$ easy_install -m [PACKAGE]

then

$ rm -rf .../python2.X/site-packages/[PACKAGE].egg

这对我很管用。它与前面的答案相似，但是包的路径不同。

Sudo easy_install -m sudo rm -rf /Library/Python/2.7/site-packages/.egg

平台:MacOS High Sierra 10.13.3版本

If the problem is a serious-enough annoyance to you, you might consider virtualenv. It allows you to create an environment that encapsulates python libraries. You install packages there rather than in the global site-packages directory. Any scripts you run in that environment have access to those packages (and optionally, your global ones as well). I use this a lot when evaluating packages that I am not sure I want/need to install globally. If you decide you don't need the package, it's easy enough to just blow that virtual environment away. It's pretty easy to use. Make a new env:

$>virtualenv /path/to/your/new/ENV

Virtual_envt在新环境中为你安装setuptools，所以你可以这样做:

$>ENV/bin/easy_install

您甚至可以创建自己的boostrap脚本来设置新环境。因此，用一个命令，你就可以创建一个新的虚拟env，比如python 2.6, psycopg2和默认安装的django(如果你愿意，你也可以安装env特定版本的python)。