在Archlinux中进行软件降级

天升级Archlinux的时候,发现Python有2.6.3-2的更新,便立刻升级了。谁知更新完就立马出现了问题,在调用logging的时候会出现如下错误:

root# ipython
Python 2.6.3 (r263:75183, Oct  4 2009, 11:40:05)
Type "copyright", "credits" or "license" for more information.

IPython 0.10 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: from logging import *
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/usr/lib/python2.6/<ipython console> in <module>()

AttributeError: 'module' object has no attribute 'NullHandler'

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