python 使用 easy_install 导入错误：没有名为 _md5 的模块

我查了很多资料都没有找到这个问题的答案=(

我有一台 CentOS 5 作为服务器，请遵循以下操作方法：http://wiki.osqa.net/display/docs/RHEL%2C+CentOS+5+Installation+Guide#RHEL%2CCentOS5InstallationGuide-Python http://wiki.osqa.net/display/docs/RHEL%2C+CentOS+5+Installation+Guide#RHEL%2CCentOS5InstallationGuide-Python

我可以安装与 yum 版本分开的 python 2.6。但是当我运行 ./easy_install ElementTree 时，我收到这个奇怪的错误：

    Traceback (most recent call last):
  File "./easy_install", line 9, in <module>
    load_entry_point('distribute==0.6.14', 'console_scripts', 'easy_install')()
  File "/opt/ActivePython-2.6/lib/python2.6/site-packages/pkg_resources.py", line 305, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/opt/ActivePython-2.6/lib/python2.6/site-packages/pkg_resources.py", line 2244, in load_entry_point
    return ep.load()
  File "/opt/ActivePython-2.6/lib/python2.6/site-packages/pkg_resources.py", line 1954, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/opt/ActivePython-2.6/lib/python2.6/site-packages/setuptools/command/easy_install.py", line 24, in <module>
    from setuptools.package_index import PackageIndex
  File "/opt/ActivePython-2.6/lib/python2.6/site-packages/setuptools/package_index.py", line 2, in <module>
    import sys, os.path, re, urlparse, urllib2, shutil, random, socket, cStringIO
  File "/opt/ActivePython-2.6/lib/python2.6/urllib2.py", line 93, in <module>
    import hashlib
  File "/opt/ActivePython-2.6/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/ActivePython-2.6/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5

我不懂 python，也不知道如何解决这个问题，我正在尝试安装 OSQA 来为另一个国家运行 phpBB 支持论坛。

感谢您的任何帮助，最诚挚的问候。

我猜测以前在 CentOS 上也遇到过类似的问题，是新 Python 的 ld 路径未设置，并且找不到其可加载模块文件夹。

这篇博文中的第三个代码块显示了为 opt Python 设置 ld 路径（尽管它是 2.7）：http://toey.tc20.net/2010/08/04/install-python-2-7-gevent-on-centos-5-x86_64/ http://toey.tc20.net/2010/08/04/install-python-2-7-gevent-on-centos-5-x86_64/

我认为安装程序会在安装步骤中完成此操作，但也许上面的博客文章会有一些帮助。