Binder functionality is broken

[j-dr]

It appears that the dependencies of the repo are no longer self consistent, and this is causing issues when starting binder instances. For example, when I click the binder link on the main repo page, Binder tries to install the dependencies, but gives the following error:

Could not solve for environment specs
The following packages are incompatible
└─ pyephem is installable with the potential options
├─ pyephem 3.7.6.0 would require
│ └─ python [2.7* |>=2.7,<2.8.0a0 ], which can be installed;
├─ pyephem 3.7.6.0 would require
│ └─ python [3.5* |>=3.5,<3.6.0a0 ], which can be installed;
├─ pyephem 3.7.6.0 would require
│ └─ python 3.6* , which can be installed;
├─ pyephem 3.7.6.0 would require
│ └─ python >=3.6,<3.7.0a0 , which can be installed;
└─ pyephem 3.7.6.0 would require
└─ python >=3.7,<3.8.0a0 , which can be installed.

I think this might be as simple as changing pyephem==3.7.6.0 to the most recent version of pyephem.

[alxogm]

Curiously if you start the binder from the link that is the DESI webpage https://www.desi.lbl.gov/education-outreach/desi-high/ (https://mybinder.org/v2/gh/michaelJwilson/DESI-HighSchool/1.2.6) it starts without issue...

[michaelJwilson]

@alxogm the latter is versioned, as per the 1.2.6 in the url.

[alxogm]

Oh, thanks! I'm not familiar with binder, I think there are no many in the current desihigh team who are, so we will actually discuss if we keep the support for forthcoming versions or we focus on the Colab support. If you could give (to some of us) a short tutorial, some day, on how to set it up and update it (or write down in slack some detailed instructions), it could help us to keep the support.

Thanks!