Notebook: Jupyter 4 Can't Find My Anaconda Python 3 Repo

[chrisalbon]

I conda update ipython and conda install jupyter without a problem. Then I opened jupyter with jupyter notebook without issue. Then, immediately, I get a kernel error saying it cannot find my Py3 kernel (see trackback below), however my Py3 kernel is my Anaconda root environment (/Users/chrisralbon/anaconda) not where it thinks, at /Users/chrisralbon/anaconda/envs/py3k/bin/python. I am not sure why it is looking there.

Traceback (most recent call last):
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/notebook/base/handlers.py", line 436, in wrapper
    result = yield gen.maybe_future(method(self, *args, **kwargs))
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/notebook/services/sessions/handlers.py", line 56, in post
    model = sm.create_session(path=path, kernel_name=kernel_name)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/notebook/services/sessions/sessionmanager.py", line 66, in create_session
    kernel_name=kernel_name)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/notebook/services/kernels/kernelmanager.py", line 84, in start_kernel
    **kwargs)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/jupyter_client/multikernelmanager.py", line 109, in start_kernel
    km.start_kernel(**kwargs)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/jupyter_client/manager.py", line 239, in start_kernel
    **kw)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/jupyter_client/manager.py", line 186, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)
  File "/Users/chrisralbon/anaconda/lib/python3.4/site-packages/jupyter_client/launcher.py", line 119, in launch_kernel
    proc = Popen(cmd, **kwargs)
  File "/Users/chrisralbon/anaconda/lib/python3.4/subprocess.py", line 859, in __init__
    restore_signals, start_new_session)
  File "/Users/chrisralbon/anaconda/lib/python3.4/subprocess.py", line 1457, in _execute_child
    raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: '/Users/chrisralbon/anaconda/envs/py3k/bin/python'

[Carreau]

Can you try a python -m IPython kernelspec install-self to reinstall the kernelspec ?

[chrisalbon]

Sweet, python -m IPython kernelspec install-self totally fixed it. Tests working perfectly now.

[Carreau]

Great ! Closing.

[amysjsj]

So sweet! Working perfectly now! Thanks Carreau:)

[engyasin]

Great , I had the same problem and now , Solved !! :) :) :+1:

[willingc]

@engyasin :+1:

[mohamedalsherif]

Fixed it to me too! Thankx

[ghost]

Fixed for me too, thanks Carreau!

[marwahaha]

Thank you!

python -m jupyter kernelspec install-self did the trick.

[Shuyib]

Hi, i'm also having a similiar error. How do i fix it?
Traceback (most recent call last):
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/notebook/base/handlers.py", line 457, in wrapper
result = yield gen.maybe_future(method(self, _args, *_kwargs))
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(_exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/notebook/services/sessions/handlers.py", line 62, in post
kernel_id=kernel_id))
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(_exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/notebook/services/sessions/sessionmanager.py", line 79, in create_session
kernel_name)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(_exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/notebook/services/sessions/sessionmanager.py", line 92, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/tornado/gen.py", line 282, in wrapper
yielded = next(result)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/notebook/services/kernels/kernelmanager.py", line 87, in start_kernel
super(MappingKernelManager, self).start_kernel(__kwargs)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
km.start_kernel(__kwargs)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/jupyter_client/manager.py", line 243, in start_kernel
*_kw)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/jupyter_client/manager.py", line 189, in _launch_kernel
return launch_kernel(kernel_cmd, *_kw)
File "/Users/brendamainye/anaconda/lib/python2.7/site-packages/jupyter_client/launcher.py", line 123, in launch_kernel
proc = Popen(cmd, *_kwargs)
File "/Users/brendamainye/anaconda/lib/python2.7/subprocess.py", line 710, in __init__
errread, errwrite)
File "/Users/brendamainye/anaconda/lib/python2.7/subprocess.py", line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

[takluyver]

Use jupyter kernelspec list to find out where your kernelspecs are installed. One of them contains an invalid path to a Python interpreter.

[Shuyib]

Thanks! I checked it out and reinstalled the ipykernel for python 2 and python3.

[b0ry]

I've just started using Jupyter and I'm having the same problem.

I've tried reinstalling the Jupyter kernel:

Nice. No joy though.

And I've tried reinstalling the Python2 kernel:

Still no joy :_(

Am I doing something silly? My code is simply

And here's the path in my Jupyter docs

[takluyver]

The paths in the jupyter dashboard are from the directory where you
launched the notebook server. That's probably not root. Run %pwd to see the
working directory the _kernel_ is running in, which should give you a clue.

[b0ry]

My current working directory is:

But even writing

gives the same error.

Are there any more diagnostics the community can think of?

[takluyver]

Your file is called channel_1.dat, you're using channel1.dat.

[b0ry]

Quite literally, laughing out loud... I'm such a plonker sometimes.

Thank you takluyver,

[Rockgecko]

Also worked for me on Windows VM running Windows 7 Pro- thanks!