Ipython Jupyter笔记本和水蟒

我在Ubuntu中安装了Jupyter，并使用了Anaconda。当我尝试打开一个新的空ipython笔记本时，我得到一个错误“NameError:global name“datetime”未定义”。我在下面转录完整的错误信息：

[IPKernelApp] ERROR | Invalid Message
Traceback (most recent call last):
  File "/home/luiz/anaconda/lib/python2.7/site-packages/ipykernel/kernelbase.py", line 175, in dispatch_shell
    msg = self.session.deserialize(msg, content=True, copy=False)
  File "/home/luiz/anaconda/lib/python2.7/site-packages/jupyter_client/session.py", line 870, in deserialize
    return adapt(message)
  File "/home/luiz/anaconda/lib/python2.7/site-packages/jupyter_client/adapter.py", line 386, in adapt
    header['date'] = datetime.now().isoformat()
NameError: global name 'datetime' is not defined
[IPKernelApp] ERROR | Invalid Message
Traceback (most recent call last):
  File "/home/luiz/anaconda/lib/python2.7/site-packages/ipykernel/kernelbase.py", line 175, in dispatch_shell
    msg = self.session.deserialize(msg, content=True, copy=False)
  File "/home/luiz/anaconda/lib/python2.7/site-packages/jupyter_client/session.py", line 870, in deserialize
    return adapt(message)
  File "/home/luiz/anaconda/lib/python2.7/site-packages/jupyter_client/adapter.py", line 386, in adapt
    header['date'] = datetime.now().isoformat()
NameError: global name 'datetime' is not defined

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我缺少什么？

哎呀，我需要更新一些iPython依赖项。问题解决了

谢谢