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    Gustavo Rodrigues dos Reis
    @reis.rodrigues.gustavo_gitlab
    Oh I see, thanks for your help @jasongrout :) I was thinking in putting it at the very bottom of the page, as if I just had created a cell
    But since it is not possible for now I'll wait, do you know what feature could I be watching to know the evolution of this possibility? (If it is planned of course)
    have created*
    Darin Richards
    @DarinRichards_gitlab
    Where would I go to ask for a modification to Jupyter
    agoose77
    @agoose77:matrix.org
    [m]
    @DarinRichards_gitlab: if it's a feature that you think many people would like, you can raise a feature request issue on GitHub. https://github.com/jupyterlab/jupyterlab/issues/new/choose
    Otherwise, you need to motivate someone to make the change in an extension ( or do it yourself )
    Darin Richards
    @DarinRichards_gitlab
    Thank you @agoose77:matrix.org :)
    Eduardo Blancas
    @edublancas
    Hi. Is there any way to submit a proposal to present at the Jupyter community meeting? I'd like to present my open-source project. I couldn't find anything in the community page.
    5 replies
    0.618
    @0618_twitter

    Hi folks! I have a question about the example folder. After I run python main.py (followed this instruction), I got an error saying:

    Traceback (most recent call last):
    File "main.py", line 17, in <module>
    from jupyterlab_server import LabServerApp
    ImportError: No module named jupyterlab_server

    I did pip3 install --upgrade jupyterlab_server, but it doesn’t help.

    Did I miss anything? Thanks!

    agoose77
    @agoose77:matrix.org
    [m]
    0618_twitter (0.618) what happens when you run python -m pip list vs pip3 list
    1 reply
    agoose77
    @agoose77:matrix.org
    [m]
    @0618_twitter you won't have a module named pip3 - did you run the commands that I typed?
    1 reply
    :point_up: Edit: 0618_twitter (0.618) what happens when you run # python -m pip list vs # pip3 list
    :point_up: Edit: 0618_twitter (0.618) what happens when you run # python -m pip list vs # pip3 listwithout the #
    agoose77
    @agoose77:matrix.org
    [m]
    0618_twitter (0.618) this means that the program that pip3 resolves to is not using the same python binary.
    1 reply
    frrrost
    @frrrost

    Hello!

    I just updated to JupyterLab 3.0.4 and when I type “jupyter lab” I see it’s starting, but address “localhost:8888/lab” returns error 404
    Although, "localhost:8888/tree" works just fine.
    I have some lab extensions and I am sure it might be the case, but I have no idea, where to look?
    Can I turn on some log or use anything else to find out, who’s throwing 404 and why?

    1 reply
    agoose77
    @agoose77:matrix.org
    [m]
    @frrrost: that suggests that lab isn't loading, just the notebook. I wouldn't expect to see /tree working and not /lab, so I wonder if something's amiss regarding configuration.
    JupyterLab 3.x should use Jupyter Server, can you run jupyter server extension list?
    Also, can you share the console output from when you start JupyterLab?
    1 reply
    agoose77
    @agoose77:matrix.org
    [m]
    That's an interesting error. I don't recall seeing it reported before. Can you create a clean env and try again?
    frrrost
    @frrrost
    Ok, I'll try, but it will take some time. I am more an analitic than python programmer :)
    3 replies
    MuppetPasta
    @MuppetPasta
    Q: is there a currently working cdn url for notebook statics? I'm seeing ssl errors on cdn.jupyter.org (I assume that's no longer maintained or something)
    1 reply
    brondou666
    @brondou666
    I want to install the jupyternotebook development environment on centos7 and use IDEA for breakpoint debugging, but the community information only uses jupyter notebook to start after pip install. How should I start? Can someone help me?
    agoose77
    @agoose77:matrix.org
    [m]
    @frrrost: ah easily done :P
    Kushal
    @moustacheman1
    Is there anything in Jupyter notebooks where my notebook code can go in 3 different ways and you can run them individually like so:
                                    |
                             current code
                                     |
                                     | 
                            /                \
                     code                  code
              that does x           that does y
    ?
    sorry if this is a dump question
    enzotib
    @enzotib
    Hi, I am new to jupyter and sympy. How to make print to output MathJax? `
    2 replies
    Alex Rogozhnikov
    @arogozhnikov

    Hello,
    I want "notebook.myipynb" and other files with myipynb extension to be opened as notebooks.

    I've patched contentsmanager to return *.myipynb as notebook models. Jupyter Notebook properly renders this as a notebook, but not Jupyterlab. How do I fix this?

    I'm a bit lost where to look for this logic in the code and if this is somewhat configurable
    brondou666
    @brondou666
    Hello everyone, I want to debug and execute through breakpoints in REDHAT7.5 +Pycharm. Is there any way to build such an environment? Is it only possible to install the source package through pip install?
    enzotib
    @enzotib:matrix.org
    [m]
    in IPython Notebook, how to have markdown heading not numbered?
    1 reply
    brondou666
    @brondou666
    How does Prometheus use the data returned by the /metrics API? I found that I need to log in to return the data. How to set it up? Does anyone know?
    enzotib
    @enzotib:matrix.org
    [m]
    In classic notebook interface I don't know how to do the same, but luckily I don't use classic notebook
    0.618
    @0618_twitter
    Question: why do we unset the focus in the base.css?
    Denis J. Cirulis
    @redr0bin
    Hello, I'm trying to find a way how to set spawn options for named servers only. It seems to me, that named servers are the same default user servers just with added identifier. The idea behind this is mixed kubernetes node pools with spot and ondemand instances. The default server will be always spawned on spot instances, but when user needs a longer living server this could be spawned on ondemand nodes
    I already tried user profiles with node_selectors, this works. Just thought named servers also has the possibility to customize themselves
    Angus Hollands
    @agoose77:matrix.org
    [m]
    @redr0bin: have you tried the #jupyterhub_jupyterhub:gitter.im room?
    Denis J. Cirulis
    @redr0bin
    @agoose77:matrix.org ahh, sorry my bad, wrong channel
    phm1
    @phm1
    Hi all, I am facing an issue with jupyter. While opening a URL in both Jupiter Notebook and Jupyter Lab I get an error
    OSError: [Errno 22] Invalid argument: 'https://data.rivm.nl/covid-19_casus_landelijk.json'. Running Jupyter lab in Pycharm (on windows) latest version. When I use Pycharm without Jupyter it runs fine (open URL runs smoothly). It is all "slashes" so that is not an issue ;-) If I download the json first on my windowspc and open it locally, it runs fine (same code, just other source). Looks like jupyter is not able to open an external URL.?? See code below. with open('https://data.rivm.nl/covid-19_casus_landelijk.json', mode='r') as fh:
    nl = json.load(fh)
    Angus Hollands
    @agoose77
    @phm1 In Python you need to open URLs using a request library, e.g. urllib.request or requests.
    phm1
    @phm1
    @agoose77 Angus, thanks. Slightly diffence from (standard) python and jupyter... Wasn't aware of it. Thanks again.
    Angus Hollands
    @agoose77:matrix.org
    [m]
    @phm1 I'm not sure that you can use open to load urls in any python environment. Some libraries implement open functions that do support this, but it's not the built in function
    Min RK
    @minrk
    You can check repr(open) in the environment where it works to see where it's been imported from.
    Bowe Strickland
    @bostrick
    hello all... i've always smoothly started jupyter lab in a clean python virtual environment via pip, but today am having problems... identical to this issue... jupyterlab/jupyterlab#10228
    any advice?
    Kevin Bates
    @kevin-bates
    Hi @bostrick - This appears to be a snafu between the updated release of Jupyter Server and the nbclassic extension. I’ve commented on the referenced issue that a downgrade of jupyter_server==1.6.4 should suffice until we get nbclassic rolling again. I suppose there might be a way to disable nbclassic, but I’m not up on how that would be accomplished.
    Bowe Strickland
    @bostrick
    @kevin-bates many thanks!
    confirmed, rolling again...
    Kevin Bates
    @kevin-bates
    That’s great news. Could you please comment on the issue since it appears we’re still getting folks confirming the issue exists. Thank you.
    Angus Hollands
    @agoose77:matrix.org
    [m]
    Hi all, has anyone seen the jinja3 release news yet? I imagine that some new features will help some downstream projects like voila
    2 replies