最新的 apt-get 升级失败：
Setting up python2.7-minimal (2.7.3-0ubuntu3.4) ...
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site.py", line 563, in <module>
main()
File "/usr/local/lib/python2.7/site.py", line 545, in main
known_paths = addusersitepackages(known_paths)
File "/usr/local/lib/python2.7/site.py", line 278, in addusersitepackages
user_site = getusersitepackages()
File "/usr/local/lib/python2.7/site.py", line 253, in getusersitepackages
user_base = getuserbase() # this will also set USER_BASE
File "/usr/local/lib/python2.7/site.py", line 243, in getuserbase
USER_BASE = get_config_var('userbase')
File "/usr/local/lib/python2.7/sysconfig.py", line 520, in get_config_var
return get_config_vars().get(name)
File "/usr/local/lib/python2.7/sysconfig.py", line 419, in get_config_vars
_init_posix(_CONFIG_VARS)
File "/usr/local/lib/python2.7/sysconfig.py", line 298, in _init_posix
raise IOError(msg)
IOError: invalid Python installation: unable to open /usr/local/include/python2.7 /pyconfig.h (No such file or directory)
dpkg: error processing python2.7-minimal (--configure):
subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
python2.7-minimal
由于找不到 /usr/local/include/python2.7/pyconfig.h，重新安装 python2.7-minimal 失败。我有替代安装：
root@ely:~# sudo update-alternatives --config python
There are 2 choices for the alternative python (providing /usr/bin/python).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/python2.7 60 auto mode*
1 /usr/bin/python2.7 60 manual mode
2 /usr/bin/python3 40 manual mode
root@ely:~# whereis python
python: /usr/bin/python3.2mu /usr/bin/python2.7 /usr/bin/python2.7-config /usr/bin
/python /usr/bin/python3.2 /usr/bin/python2.7-dbg-config /usr/bin/python2.7-dbg
/etc/python2.7 /etc/python /etc/python3.2 /usr/lib/python2.7 /usr/lib/python3.2 /usr/bin
/X11/python3.2mu /usr/bin/X11/python2.7 /usr/bin/X11/python2.7-config /usr/bi/X11/python
/usr/bin/X11/python3.2 /usr/bin/X11/python2.7-dbg-config /usr/bin/X11/python2.7-dbg
/usr/local/bin/python3.2m /usr/local/bin/python2.7 /usr/local/bin/python3.2m-config
/usr/local/bin/python2.7-config /usr/local/bin/python3.2 /usr/local/bin/python3.2-config
/usr/local/lib/python2.7 /usr/local/lib/python3.2 /usr/include/python3.2mu /usr/include
/python2.7 /usr/include/python2.7_d /usr/include/python3.2 /usr/include/python3.2_d
/usr/share/python /usr/share/man/man1/python.1.gz
但是 pyconfig.h 只能在 /usr/include/python*.*/ 中找到（应该是这样吗？）
到底是怎么回事？如何修复（其他软件包的安装受到影响）？谢谢。