将pudb与ipython一起使用时出错

我尝试使用带有ipython的PuDB作为shell，但是当我转到shell时，我得到以下错误：

can't set attribute
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/Library/Python/2.7/site-packages/IPython/core/interactiveshell.py", line 2744, in atexit_operations
    self.reset(new_session=False)
  File "/Library/Python/2.7/site-packages/IPython/core/interactiveshell.py", line 1132, in reset
    self.displayhook.flush()
  File "/Library/Python/2.7/site-packages/IPython/core/displayhook.py", line 255, in flush
    self.shell.user_ns['_oh'].clear()
KeyError: '_oh'
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/Library/Python/2.7/site-packages/IPython/core/interactiveshell.py", line 2744, in atexit_operations
    self.reset(new_session=False)
  File "/Library/Python/2.7/site-packages/IPython/core/interactiveshell.py", line 1132, in reset
    self.displayhook.flush()
  File "/Library/Python/2.7/site-packages/IPython/core/displayhook.py", line 255, in flush
    self.shell.user_ns['_oh'].clear()
KeyError: '_oh'

版本详情：

• PuDB 2011.3.1
• 伊皮顿0.12
• Python 2.7.1
• Mac OS X 10.7.3

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这是一个，应在IPython 0.12.1或master中固定。更新到当前的（0.12.1）IPython有帮助吗？

我不得不将IPython升级到0.12.1，将pudb升级到2012.1。做了那件事之后，它成功了。