Scriptable inputs

Along with drivers, it would be really nice to be able to add simple python scripts to value inputs.

While it's possible to add a global script that animates things programmatically, it can get messy when you have multiple values in a scene that you want animated, and it also requires a lot of boilerplate to register and unregister things like frame event bindings.

It would be great to have an easy Right Click > Add Python Driver option on any value, where a small window would appear that would allow you to add in simple python code.

Things could be simplified by automatically:

• Importing bpy
• binding to frame change and scene update
• allowing the use of simple, scene scope variables such as "frame," and "object," (for current object).
• Automatically detecting "simple," vs "return," scripts.
  • Simple Script EX: frame % 5 . No return value, and it's very easy to interpret what the return value would be
  • Return Script: Multi-line script, automatically treated as function definition and used for more complicated scripting and calculations. User must specify return X in order for it to know which value is the important one.

I love using Blender for my 2D animations and ditched After Effects entirely, but the one thing I really miss is how easy it was to add expressions to values, and this would be a good solution to that issue.