I followed the IRkernel instructions on github but when I load up a new notebook it says that there is a kernel error with this error code:
Traceback (most recent call last):
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/web.py", line 1703, in _execute
result = await result
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.8/site-packages/notebook/services/sessions/handlers.py", line 69, in post
model = yield maybe_future(
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.8/site-packages/notebook/services/sessions/sessionmanager.py", line 88, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.8/site-packages/notebook/services/sessions/sessionmanager.py", line 100, in start_kernel_for_session
kernel_id = yield maybe_future(
File "/opt/anaconda3/lib/python3.8/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.8/site-packages/notebook/services/kernels/kernelmanager.py", line 176, in start_kernel
kernel_id = await maybe_future(self.pinned_superclass.start_kernel(self, **kwargs))
File "/opt/anaconda3/lib/python3.8/site-packages/jupyter_client/multikernelmanager.py", line 185, in start_kernel
km.start_kernel(**kwargs)
File "/opt/anaconda3/lib/python3.8/site-packages/jupyter_client/manager.py", line 313, in start_kernel
self.kernel = self._launch_kernel(kernel_cmd, **kw)
File "/opt/anaconda3/lib/python3.8/site-packages/jupyter_client/manager.py", line 220, in _launch_kernel
return launch_kernel(kernel_cmd, **kw)
File "/opt/anaconda3/lib/python3.8/site-packages/jupyter_client/launcher.py", line 131, in launch_kernel
proc = Popen(cmd, **kwargs)
File "/opt/anaconda3/lib/python3.8/subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/opt/anaconda3/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'R'
What am I missing here? I'm fairly new to jupyter and programming in general.
Open Terminal
$ jupyter kernelspec list
Go to the dir of irkennel
$ cd 'THE_PATH_OF_IRKENNEL'
Remove the json file 'kernel.json' and restart jupyter notebook
Related
I created an enviroment for R in Anaconda Navigator and form there I launched Jupyter Notebook and opened the file I want to program in. And then I chose the kernel for R.
But I get a red warning sign at the top saying: Kernel Error.
Once I click on it I read this:
Traceback (most recent call last):
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\web.py", line 1713, in _execute
result = await result
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\tasks.py", line 304, in __wakeup
future.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\notebook\services\sessions\handlers.py", line 74, in post
model = yield maybe_future(
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 98, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 110, in start_kernel_for_session
kernel_id = yield maybe_future(
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\futures.py", line 201, in result
raise self._exception
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\tasks.py", line 232, in __step
result = coro.send(None)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 176, in start_kernel
kernel_id = await maybe_future(self.pinned_superclass.start_kernel(self, **kwargs))
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\futures.py", line 201, in result
raise self._exception
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\tasks.py", line 232, in __step
result = coro.send(None)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\multikernelmanager.py", line 214, in _async_start_kernel
starter = ensure_async(km.start_kernel(**kwargs))
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\futures.py", line 201, in result
raise self._exception
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\tasks.py", line 232, in __step
result = coro.send(None)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\manager.py", line 83, in wrapper
raise e
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\manager.py", line 75, in wrapper
out = await method(self, *args, **kwargs)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\manager.py", line 389, in _async_start_kernel
await ensure_async(self._launch_kernel(kernel_cmd, **kw))
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\futures.py", line 201, in result
raise self._exception
File "C:\Users\ronal\anaconda3\envs\both\lib\asyncio\tasks.py", line 232, in __step
result = coro.send(None)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\manager.py", line 307, in _async_launch_kernel
connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 204, in launch_kernel
self.process = launch_kernel(cmd, **scrubbed_kwargs)
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\launcher.py", line 170, in launch_kernel
raise ex
File "C:\Users\ronal\anaconda3\envs\both\lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel
proc = Popen(cmd, **kwargs)
File "C:\Users\ronal\anaconda3\envs\both\lib\subprocess.py", line 966, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Users\ronal\anaconda3\envs\both\lib\subprocess.py", line 1435, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified
So I assume I have deleted the file in question. Can you help me fix this error?
I have been trying to get a Jupyter object detection tutorial to run but for some reason, when the left hand side should go from In[] and switch to In1, it stays as In[0]. I assume this means the code isn't actually running. The top of the page also says there is a Kernel Error and when I click this, the following code is displayed:
Traceback (most recent call last):
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\web.py", line 1703, in _execute
result = await result
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "c:\anaconda\envs\tensorflow1\lib\site-packages\notebook\services\sessions\handlers.py", line 69, in post
model = yield maybe_future(
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "c:\anaconda\envs\tensorflow1\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 88, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "c:\anaconda\envs\tensorflow1\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 100, in start_kernel_for_session
kernel_id = yield maybe_future(
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "c:\anaconda\envs\tensorflow1\lib\site-packages\tornado\gen.py", line 209, in wrapper
yielded = next(result)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 168, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_client\multikernelmanager.py", line 158, in start_kernel
km.start_kernel(**kwargs)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_client\manager.py", line 301, in start_kernel
kernel_cmd, kw = self.pre_start_kernel(**kw)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_client\manager.py", line 248, in pre_start_kernel
self.write_connection_file()
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_client\connect.py", line 468, in write_connection_file
self.connection_file, cfg = write_connection_file(self.connection_file,
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_client\connect.py", line 138, in write_connection_file
with secure_write(fname) as f:
File "c:\anaconda\envs\tensorflow1\lib\contextlib.py", line 113, in enter
return next(self.gen)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_core\paths.py", line 435, in secure_write
win32_restrict_file_to_user(fname)
File "c:\anaconda\envs\tensorflow1\lib\site-packages\jupyter_core\paths.py", line 361, in win32_restrict_file_to_user
import win32api
ImportError: DLL load failed while importing win32api: The specified module could not be found.
I am not sure why there is an import error. For reference, I have downloaded CUDA 10.1, cuDNN 7.6.5, anaconda for python 3.6, and TensorFlow 2.0.0. Please let me know how I can fix this to get the Jupyter code to run.
I had the same problem. Then I rebooted and it worked fine.
Recently I updated R n Jupyter Lab with homebrew.
Today, I am surprised that R failed to run on ipython notebook with error below:
Error Starting Kernel
Traceback (most recent call last):
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/web.py", line 1699, in _execute
result = await result
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/handlers.py", line 72, in post
type=mtype))
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py", line 88, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py", line 101, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 735, in run
value = future.result()
File "/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py", line 209, in wrapper
yielded = next(result)
File "/opt/anaconda3/lib/python3.7/site-packages/notebook/services/kernels/kernelmanager.py", line 168, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "/opt/anaconda3/lib/python3.7/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
km.start_kernel(**kwargs)
File "/opt/anaconda3/lib/python3.7/site-packages/jupyter_client/manager.py", line 259, in start_kernel
**kw)
File "/opt/anaconda3/lib/python3.7/site-packages/jupyter_client/manager.py", line 204, in _launch_kernel
return launch_kernel(kernel_cmd, **kw)
File "/opt/anaconda3/lib/python3.7/site-packages/jupyter_client/launcher.py", line 138, in launch_kernel
proc = Popen(cmd, **kwargs)
File "/opt/anaconda3/lib/python3.7/subprocess.py", line 775, in __init__
restore_signals, start_new_session)
File "/opt/anaconda3/lib/python3.7/subprocess.py", line 1522, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/Cellar/r/3.5.3/lib/R/bin/R': '/usr/local/Cellar/r/3.5.3/lib/R/bin/R'
Appreciate your advice.
The interesting part of the error is.
FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/Cellar/r/3.5.3/lib/R/bin/R': '/usr/local/Cellar/r/3.5.3/lib/R/bin/R'
I guess you Jupyter kernel is referencing the old installation of R that you have updated.
The first thing to do is to check what is defined in your R kernel.
Check kernel
# list all kernel
jupyter kernelspec list
#Available kernels:
# ir /opt/conda/share/jupyter/kernels/ir
# ...
You should have an ir kernel.
Check the content of the kernel definition, for example:
$ cat /opt/conda/share/jupyter/kernels/ir/kernel.json
# {"argv": ["R", "--slave", "-e", "IRkernel::main()", "--args", "{connection_file}"],
# "display_name":"R",
# "language":"R"
# }
If the command in argv is incorrect you can remove an reinstall the kernel.
Remove and reinstall the kernel
See the IRkernel installation documentation for more information.
$ jupyter kernelspec remove ir
$ R
# Install IRkernel
> install.packages('IRkernel')
# Or update it if already installed
> update.packages('IRkernel')
# Install the kernel
> IRkernel::installspec()
# Or alternatively if you want to install it system-wide
> IRkernel::installspec(user = FALSE)
In the kernel error appears this:
Traceback (most recent call last):
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\web.py", line 1699, in _execute
result = await result
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\handlers.py", line 72, in post
type=mtype))
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\sessionmanager.py", line 88, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\sessionmanager.py", line 101, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 209, in wrapper
yielded = next(result)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\notebook\services\kernels\kernelmanager.py", line 168, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
km.start_kernel(**kwargs)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_client\manager.py", line 240, in start_kernel
self.write_connection_file()
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 476, in write_connection_file
kernel_name=self.kernel_name
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 141, in write_connection_file
with secure_write(fname) as f:
File "C:\Users\A0165\Anaconda3\lib\contextlib.py", line 112, in enter
return next(self.gen)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_core\paths.py", line 404, in secure_write
win32_restrict_file_to_user(fname)
File "C:\Users\A0165\AppData\Roaming\Python\Python37\site-packages\jupyter_core\paths.py", line 359, in win32_restrict_file_to_user
import win32api
ImportError: DLL load failed: No se encontró el proceso especificado.
I recently got same error on Windows10 x86_64bit with Python3.7-32bit or Python3.8-64bit environment. In my case, the mismatch of bit and version seemed to be the root cause. At first I uninstalled all the Python versions and Anaconda, then re-installed them again as following, then the kernel error disappeared on junyper-notebook.
Windows10 x86_64bit
Python3.7.5-64bit
Anaconda3-2019.10-Windows-x86_64
*Anaconda seems to use \Python37\ path as default so my Python3.8 didn't work well. I don't know how to change the path to Python38.
Like sshinobu, I recently got this error here.
Short version - It went away after running Anaconda-Navigator, and if needed Anaconda Prompt in administrator mode. Hope that fixes it for you
I am new to Jupyter notebook when I try to create a Jupyter notebook, it fail to start the kernel by showing below error message, my python version is 3.5.2 and jupyter version is 4.2.0:
Traceback (most recent call last):
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 526, in get
value = obj._trait_values[self.name]
KeyError: 'loop'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/andy/anaconda3/lib/python3.5/site-packages/notebook/base/handlers.py", line 457, in wrapper
result = yield gen.maybe_future(method(self, *args, **kwargs))
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/home/andy/anaconda3/lib/python3.5/asyncio/futures.py", line 274, in result
raise self._exception
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/home/andy/anaconda3/lib/python3.5/site-packages/notebook/services/sessions/handlers.py", line 62, in post
kernel_id=kernel_id))
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/home/andy/anaconda3/lib/python3.5/asyncio/futures.py", line 274, in result
raise self._exception
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/home/andy/anaconda3/lib/python3.5/site-packages/notebook/services/sessions/sessionmanager.py", line 79, in create_session
kernel_name)
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/home/andy/anaconda3/lib/python3.5/asyncio/futures.py", line 274, in result
raise self._exception
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/home/andy/anaconda3/lib/python3.5/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 "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/home/andy/anaconda3/lib/python3.5/asyncio/futures.py", line 274, in result
raise self._exception
File "/home/andy/.local/lib/python3.5/site-packages/tornado/gen.py", line 326, in wrapper
yielded = next(result)
File "/home/andy/anaconda3/lib/python3.5/site-packages/notebook/services/kernels/kernelmanager.py", line 87, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "/home/andy/anaconda3/lib/python3.5/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
km.start_kernel(**kwargs)
File "/home/andy/anaconda3/lib/python3.5/site-packages/jupyter_client/manager.py", line 258, in start_kernel
self.start_restarter()
File "/home/andy/anaconda3/lib/python3.5/site-packages/jupyter_client/ioloop/manager.py", line 49, in start_restarter
kernel_manager=self, loop=self.loop,
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 554, in __get__
return self.get(obj, cls)
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 533, in get
value = self._validate(obj, dynamic_default())
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 589, in _validate
value = self.validate(obj, value)
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 1681, in validate
self.error(obj, value)
File "/home/andy/anaconda3/lib/python3.5/site-packages/traitlets/traitlets.py", line 1528, in error
raise TraitError(e)
traitlets.traitlets.TraitError: The 'loop' trait of an IOLoopKernelManager instance must be a ZMQIOLoop, but a value of class 'tornado.platform.asyncio.AsyncIOMainLoop' (i.e. <tornado.platform.asyncio.AsyncIOMainLoop object at 0x7f1dd34e8ef0>) was specified.
And I have also checked the kernel by using below command:
jupyter kernelspec list
Get below result:
Available kernels:
python3 /home/andy/anaconda3/share/jupyter/kernels/python3
Can anyone help me?
Jupyter 4.2.0 is pretty old, and is not compatible with Tornado versions newer than 5.0. You need to either upgrade to a newer version of Jupyter or downgrade to an older version of Tornado (with pip, this would be pip install "tornado<5.0". I don't know the conda equivalent)