no output on MacOS

[AshtonSBradley]

I am using Jupyter on MacOS (in Chrome) and getting no output.

If I run

using WebIO
display(Node(:input, attributes = Dict("type" => "range")))

nothing appears.

Pkg.status("WebIO")
 - WebIO                         0.2.4

versioninfo()
Julia Version 0.6.4
Commit 9d11f62bcb (2018-07-09 19:09 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin14.5.0)
  CPU: Intel(R) Core(TM) i5-5250U CPU @ 1.60GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell MAX_THREADS=16)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.9.1 (ORCJIT, broadwell)

[SimonDanisch]

I think I can reproduce and see errors in the console:

[SimonDanisch]

Hm, I tried 0.2.2 up to master and it all didn't work^^ Also 0.2.5 + 0.2.6 seem to be unknown to metadata?!
Anything I'm missing, or has the IJulia support been broken for a long time now? ;)

[AshtonSBradley]

ah, yes, that would be consistent with an issue I opened on InteractNext.jl a while back ( I didn't realise that everything had moved over to InteractBase)

[rdeits]

I actually use WebIO daily in Jupyter, so this should definitely be working 🙂

I just did the following to test:

• created a brand new julia package directory
• Pkg.init()
• Pkg.add("IJulia")
• Pkg.add("WebIO")
• using IJulia; notebook(dir=pwd())

and then created a new notebook, and WebIO worked just fine:

This is with Julia v0.6.4 on Ubuntu 18.04, with the following Pkg.status():

julia> Pkg.status()
2 required packages:
 - IJulia                        1.9.0
 - WebIO                         0.2.4
16 additional packages:
 - AssetRegistry                 0.0.2
 - BinDeps                       0.8.8
 - BinaryProvider                0.3.3
 - Compat                        1.0.0
 - Conda                         0.8.1
 - FunctionalCollections         0.3.2
 - JSON                          0.17.2
 - MbedTLS                       0.5.12
 - Nullables                     0.0.6
 - Observables                   0.1.2
 - Pidfile                       1.0.0
 - Requires                      0.4.4
 - SHA                           0.5.7
 - URIParser                     0.3.1
 - VersionParsing                1.1.1
 - ZMQ                           0.6.2

Can you try following those steps and seeing if it works for you? We just need to figure out what's different between your setup and mine.

[AshtonSBradley]

I am happy to try this. Just to check - should I be clearing .julia first, or can I initialise the package directory somewhere else?

[rdeits]

No, you don't need to clear out .julia. To make a nice clean package directory, you can do the following:

• (in your terminal, make a new temporary directory and cd into it
• Create a new package folder with mkdir packages
• Tell Julia to use it by setting the environment variable with export JULIA_PKGDIR=`pwd`/packages
• Start Julia
• julia> Pkg.init()
• julia> Pkg.add("IJulia")
• etc.

Julia will use that package directory whenever it's launched from a terminal with the export JULIA_PKGDIR=... set.

When you're done, you can just delete that whole folder.

[AshtonSBradley]

I tried that, but now julia doesn't finish executing even basic commands (cells just have a * but don't finish).

[rdeits]

Maybe you have a very old version of jupyter installed? Can you try repeating the above steps, but before you do Pkg.init(), can you also run (in your terminal, not Julia)

export PYTHON=""
export JUPYTER=""

[dpsanders]

I don't get any output either for the Node test, using WebIO 0.2.4 on MacOS with Jupyter notebook version 5.4.1, on Chrome.

[AshtonSBradley]

ok, I did the new steps. Seems to be running Julia properly, but no change in this node test (I think it was installing a newer Jupyter anyway, as it has a new arrow on the active cell I hadn't noticed before).

[AshtonSBradley]

[AshtonSBradley]

2 required packages:
 - IJulia                        1.9.0
 - WebIO                         0.2.4
16 additional packages:
 - AssetRegistry                 0.0.2
 - BinDeps                       0.8.8
 - BinaryProvider                0.3.3
 - Compat                        1.0.0
 - Conda                         0.8.1
 - FunctionalCollections         0.3.2
 - JSON                          0.17.2
 - MbedTLS                       0.5.12
 - Nullables                     0.0.6
 - Observables                   0.1.2
 - Pidfile                       1.0.0
 - Requires                      0.4.4
 - SHA                           0.5.7
 - URIParser                     0.3.1
 - VersionParsing                1.1.1
 - ZMQ                           0.6.2

[rdeits]

What are the contents of your ~/.jupyter/jupyter_notebook_config.py file?

[AshtonSBradley]

###JULIA-WEBIO-CONFIG-BEGIN
import sys, os
if os.path.isfile("/Users/abradley/packages/v0.6/WebIO/deps/jlstaticserve.py"):
    sys.path.append("/Users/abradley/packages/v0.6/WebIO/deps")
    c = get_config()
    c.NotebookApp.nbserver_extensions = {
        "jlstaticserve": True
    }
else:
    print("WebIO config in ~/.jupyter/jupyter_notebook_config.py but WebIO plugin not found")
###JULIA-WEBIO-CONFIG-END

[rdeits]

ok, that looks fine. Let me pull out my old mac and give it a try...

[rdeits]

Ok, yeah, I can reproduce the error on a totally clean OSX package installation.

[rdeits]

Ok, figured it out. Try running jupyter notebook from your terminal. When I do that, the first thing that's printed is a warning message:

[W 00:11:37.798 NotebookApp] Collisions detected in /Users/rdeits/.jupyter/jupyter_notebook_config.py and /Users/rdeits/.jupyter/jupyter_notebook_config.json config files. /Users/rdeits/.jupyter/jupyter_notebook_config.json has higher priority: {
      "NotebookApp": {
        "nbserver_extensions": "{'jlstaticserve': True} ignored, using {'jupyterlab': True}"
      }
    }

That warning is important: it means that the Jupyter .json configuration file is taking priority of the Jupyter .py configuration file. But WebIO uses that .py config file to load the server-side extensions that it needs.

If you see the same warning, please try:

mv ~/.jupyter/jupyter_notebook_config.json ~/.jupyter/jupyter_notebook_config.backup.json
jupyter notebook

(you need to re-launch jupyter notebook after doing this, since we need to restart the jupyter server itself).

Doing those two steps fixed WebIO on my mac.

[AshtonSBradley]

yes - the Node test now runs!

[rdeits]

Ok, great! Now we just have to figure out why that conflicting file exists on mac and what to do about it

[SimonDanisch]

On windows, I actually get this:

julia> run(Cmd(IJulia.notebook_cmd))
WebIO config in ~/.jupyter/jupyter_notebook_config.py but WebIO plugin not found
[I 11:15:56.282 NotebookApp] JupyterLab beta preview extension loaded from C:\Users\sdani\.julia\v0.6\Conda\deps\usr\lib\site-packages\jupyterlab
[I 11:15:56.292 NotebookApp] JupyterLab application directory is C:\Users\sdani\.julia\v0.6\Conda\deps\usr\share\jupyter\lab

[SimonDanisch]

Ah, the paths were all not propperly escaped....
Now I get:

julia> run(Cmd(IJulia.notebook_cmd))
[W 11:17:49.275 NotebookApp] Error loading server extension jlstaticserve
    Traceback (most recent call last):
      File "C:\Users\sdani\.julia\v0.6\Conda\deps\usr\lib\site-packages\notebook\notebookapp.py", line 1481, in init_server_extensions
        mod = importlib.import_module(modulename)
      File "C:\Users\sdani\.julia\v0.6\Conda\deps\usr\lib\importlib\__init__.py", line 37, in import_module
        __import__(name)
    ImportError: No module named jlstaticserve
[I 11:17:49.309 NotebookApp] JupyterLab beta preview extension loaded from C:\Users\sdani\.julia\v0.6\Conda\deps\usr\lib\site-packages\jupyterlab
[I 11:17:49.309 NotebookApp] JupyterLab application directory is C:\Users\sdani\.julia\v0.6\Conda\deps\usr\share\jupyter\lab

[dpsanders]

@rdeits's suggestion fixed it for me too, many thanks!
No idea why that's happening, though.

[AshtonSBradley]

This fixed my fresh package install, but now I tried it for my usual Julia package directory, and the problem is not fixed

[SimonDanisch]

Well, windows still doesn't work, so I guess there are still other issues hiding ;)

[shashi]

Could you try #162 after moving the backed up json file back to its original location?

mv ~/.jupyter/jupyter_notebook_config.backup.json ~/.jupyter/jupyter_notebook_config.json

and see if Pkg.build("WebIO") on that branch fixes?

[SimonDanisch]

Just came here to complain that you ignored the windows problem, but it is actually working now :)

Thanks @shashi :)