我用pip安装了libxml2dom，但是import libxml2dom时提示：
shandow@mac:~ > python
Python 2.7.5 (default, Mar 9 2014, 22:15:05)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
import libxml2dom
Traceback (most recent call last):
File "", line 1, in
File "/Library/Python/2.7/site-packages/libxml2dom/__init__.py", line 24, in
from libxml2dom.macrolib import *
File "/Library/Python/2.7/site-packages/libxml2dom/macrolib/__init__.py", line 26, in
from libxml2dom.macrolib.macrolib import *
File "/Library/Python/2.7/site-packages/libxml2dom/macrolib/macrolib.py", line 30, in
from libxmlmods import libxml2mod
ImportError: No module named libxmlmods
按照错误提示，打开/Library/Python/2.7/site-packages/libxml2dom/macrolib/macrolib.py：
问题出在这里：
Try the conventional import first.
try:
import libxml2mod
except ImportError:
from libxmlmods import libxml2mod
首先导入libxml2mod，如果发生异常就从libxmlmods导入libxml2mod。我明明安装了libxml2mod，为什么导入不成功呢？接着尝试：sudo pip install libxmlmods,提示找不到。。。。。。求助大神帮忙解决
