From ~3 minutes of browsing the site, it's not clear to me exactly what the project is. It seems like 'just' a distribution of python with lots of the numpy/scipy/sympy ecosystem bundled? There's something about the website that's making it hard for me to digest it. I can't quite put my finger on it, but it feels very dense.
I will say that the multiedge graph plot[0] does seem useful. Not useful enough for me personally to go through the trouble of adopting it, but it doesn't seem like I'm their target audience. It seems like I could probably hunt down which packages they used to make the plot, and adopt those.
It is a competitor of mathematica. It is a front end of numerical libraries, but also a wrapper of external mathematical libraries, such as gap, pari etc. It can solve differential equations, do number theory, group theory, data analysis, etc.
I will say that the multiedge graph plot[0] does seem useful. Not useful enough for me personally to go through the trouble of adopting it, but it doesn't seem like I'm their target audience. It seems like I could probably hunt down which packages they used to make the plot, and adopt those.
[0] https://www.sagemath.org/tour-graphics.html