[MacPorts] #54534: py-widgetsnbextension: how to enable?

[MacPorts]

#54534: py-widgetsnbextension: how to enable?
--------------------+-----------------------------------
 Reporter:  cdeil   |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-widgetsnbextension
--------------------+-----------------------------------
 I'm using Macports to install Python / IPython / Jupyter and would like to
 enable and use the Jupyter widgets from the Jupyter notebook.

 With the default macports installation they are not enabled, which means
 that if you try to use them in the Jupyter notebook one gets this error:
 {{{
 >>> import ipywidgets as widgets
 >>> widgets.IntSlider()
 Widget Javascript not detected.  It may not be installed or enabled
 properly.
 }}}

 As explained at
 http://ipywidgets.readthedocs.io/en/latest/user_install.html one has to
 enable them like this:
 {{{
 jupyter nbextension enable --py widgetsnbextension
 }}}

 However, this doesn't work with the Macports install, that command tries
 to write to here:
 {{{
 PermissionError: [Errno 13] Permission denied:
 '/opt/local/Library/Frameworks/Python.framework/Versions/3.6/etc'
 }}}

 My understanding is that one should never use {{{sudo}}} and let other
 commands than {{{port}}} muck with the files in {{{/opt/local}}}.

 - What is a good way for Macports users to enable these extensions?
 - Is there a wiki page or any other place with this information?
 - Wouldn't it make sense that you always enable them at install time?

 I also have another third-party Jupyter widgets that are not packaged in
 Macports (https://github.com/cds-astro/ipyaladin) that I installed via
 {{{pip install --user}}}  and would like to enable now. Same question: how
 to I enable it? Should I use {{{sudo}}} and write to {{{/opt/local}}} or
 is there a better way?

 One last thing - I wasn't sure whether to file this issue for {{{py-
 ipywidgets}}} or {{{py-widgetsnbextension}}}, from the port descriptions
 it's not clear to me what the difference between the two is.

--
Ticket URL: <https://trac.macports.org/ticket/54534>
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