Ipython Notebook - ImportError:tornado

Question

我已经使用了更新龙卷风

sudo pip install --upgrade tornado

检查当前版本表明我已经有一个晚于4.0的版本

找到命令的输出:

pip show tornado | grep版本

Metadata-Version: 1.1
Version: 4.1

知道为什么Ipython笔记本不能正常工作,并不断给我一个消息,我没有龙卷风v4.1,而是有3.0版本？感谢致敬.

================================================== ======================= $ ipython笔记本

Traceback (most recent call last):
  File "/usr/local/bin/ipython", line 11, in <module>
    sys.exit(start_ipython())
  File "/usr/local/lib/python2.7/dist-packages/IPython/__init__.py", line 120, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 573, in launch_instance
    app.initialize(argv)
  File "<string>", line 2, in initialize
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/IPython/terminal/ipapp.py", line 321, in initialize
    super(TerminalIPythonApp, self).initialize(argv)
  File "<string>", line 2, in initialize
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/IPython/core/application.py", line 369, in initialize
    self.parse_command_line(argv)
  File "/usr/local/lib/python2.7/dist-packages/IPython/terminal/ipapp.py", line 316, in parse_command_line
    return super(TerminalIPythonApp, self).parse_command_line(argv)
  File "<string>", line 2, in parse_command_line
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 471, in parse_command_line
    return self.initialize_subcommand(subc, subargv)
  File "<string>", line 2, in initialize_subcommand
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 75, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/IPython/config/application.py", line 402, in initialize_subcommand
    subapp = import_item(subapp)
  File "/usr/local/lib/python2.7/dist-packages/IPython/utils/importstring.py", line 42, in import_item
    module = __import__(package, fromlist=[obj])
  File "/usr/local/lib/python2.7/dist-packages/IPython/html/notebookapp.py", line 50, in <module>
    raise ImportError(msg + ", but you have %s" % tornado.version)
ImportError: The IPython Notebook requires tornado >= 4.0, but you have 3.2

Answer 1

我有一个相互矛盾的龙卷风副本(ubuntu 14.04上的3.1.1).要查看是否适合您,请在终端中使用以下命令:

apt-cache policy python-tornado

打印出OS的版本.如果它不是您想要的版本,请使用:

sudo apt-get remove python-tornado

删除它.如果您已经安装了较新版本pip,那么现在可以看到该版本的python版本.