I'm a co-founder of Trinket and thought I'd explain why we chose Skulpt.
Client-side execution lets you do visual things that would be slow and complicated (maybe practically impossible) if you ran them server side. Visual results are one of the most important motivators for students learning to code.
Take our Sense HAT emulator, made in partnership with Raspberry Pi:
This uses 3D CSS and SVG to make a virtual Raspberry Pi that you can rotate around. The Sense HAT has a gyroscope, accelerometer, etc that kids can actually program to respond to these movements.
The alternative to this emulator was the Raspberry Pi Foundation sending boxes of computers to classrooms (which they still do). But the emulator makes this scalable while also synergizing with the computers: kids can download their code and run it on the real device if they want.
The next phase in the project is letting kids run their code in space. Mission Zero uses the emulator to let European kids get their code run on one of the Raspberry Pis in orbit on the International Space Station:
Why not Brython or RapydScript? Theoretically, either could do most of this.
Skulpt is designed for the needs of teachers and learners. Those projects have slightly different goals (making Python a web scripting language and providing a Pythonic way to write JS, respectively) which may make them a better fit for your project but we've found Skulpt to meet our users' needs the best. Our users are teachers and students in middle and high school, and some undergrads, who want to write, run, and share programs and websites as quickly and easily as possible. They need reasonable speed, fidelity to Python and lots of fun visuals. Turtle, Matplotlib, and now the Sense HAT emulator provide the visuals.
Skulpt isn't perfect but it's got a great community and is getting better all the time. I think it's the clear best choice if your users are teaching or learning. And projects like Anvil (anvil.works) show how the project can work outside of education as well, in that case for non-specialist business analysts/ops people who would otherwise be stringing together spreadsheets.
Client-side execution lets you do visual things that would be slow and complicated (maybe practically impossible) if you ran them server side. Visual results are one of the most important motivators for students learning to code.
Take our Sense HAT emulator, made in partnership with Raspberry Pi:
https://trinket.io/sense-hat
This uses 3D CSS and SVG to make a virtual Raspberry Pi that you can rotate around. The Sense HAT has a gyroscope, accelerometer, etc that kids can actually program to respond to these movements.
The alternative to this emulator was the Raspberry Pi Foundation sending boxes of computers to classrooms (which they still do). But the emulator makes this scalable while also synergizing with the computers: kids can download their code and run it on the real device if they want.
The next phase in the project is letting kids run their code in space. Mission Zero uses the emulator to let European kids get their code run on one of the Raspberry Pis in orbit on the International Space Station:
https://trinket.io/mission-zero
Skulpt makes this possible.
Why not Brython or RapydScript? Theoretically, either could do most of this. Skulpt is designed for the needs of teachers and learners. Those projects have slightly different goals (making Python a web scripting language and providing a Pythonic way to write JS, respectively) which may make them a better fit for your project but we've found Skulpt to meet our users' needs the best. Our users are teachers and students in middle and high school, and some undergrads, who want to write, run, and share programs and websites as quickly and easily as possible. They need reasonable speed, fidelity to Python and lots of fun visuals. Turtle, Matplotlib, and now the Sense HAT emulator provide the visuals.
Skulpt isn't perfect but it's got a great community and is getting better all the time. I think it's the clear best choice if your users are teaching or learning. And projects like Anvil (anvil.works) show how the project can work outside of education as well, in that case for non-specialist business analysts/ops people who would otherwise be stringing together spreadsheets.