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Ipython Notebook - ImportError: Tornado

I have already updated the tornado using

sudo pip install --upgrade tornado

Checking the current version shows that I already have a version later than 4.0

Find the output of the command:

peep tornado show | Grep version

Metadata-Version: 1.1
Version: 4.1

Any idea why the Ipython laptop is not working and keeps giving me a message that I don't have tornado v4.1 and instead of version 3.0. Thanks and respect.

==================================================== ========================= $ ipython notebook

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
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5 answers

I had a controversial copy of the tornado (3.1.1 on ubuntu 14.04). To verify that this is the case, use the commands in the terminal:

apt-cache policy python-tornado

. , , :

sudo apt-get remove python-tornado

. pip, python.

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, Python.

pip --version

( ) pip 1.5.4 /usr/lib/python 2.7/dist-packages (python 2.7)

IPython:

~$ ipython3
Python 3.4.0 (default, Apr 11 2014, 13:05:11) 
Type "copyright", "credits" or "license" for more information.

IPython 1.2.1 -- An enhanced Interactive Python.

- . virtualenv

0

, Tornado (Ubuntu 14.04). Tornado 4.1 Tornado 3.2 . , , Tornado, "Tornado-OLD". Ipython Notebook .

, , Torando. , , .

.

0

, :

sudo apt-get remove tornado
sudo pip uninstall tornado
sudo pip install tornado
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The following worked for me:

Remove Tornado:

sudo apt-get remove python-tornado

Install a tornado:

sudo pip install tornado

Tornado Update:

sudo pip install tornado --upgrade
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