I know how to do this in Coffee a few different ways. But I haven’t tried to convert most of them to python yet.

Here’s one way:

import c4d
from c4d import symbols as sy 

def main():

    obj = doc.SearchObject("Cube")#finds an object named Cube
    time = doc.GetTime()
    fps = doc.GetFps()
    doc.SetTime(c4d.BaseTime(0, fps))
    c4d.CallCommand(12410) # R.ecord A.ctive O.bjects
    c4d.CallCommand(12418) # toggle Scale track off so R.A.O doesn't create empty tracks
    c4d.CallCommand(12419) # toggle Rotation track off so R.A.O doesn't create empty tracks
    obj[sy.ID_BASEOBJECT_POSITION,1001]=0 # the cube's start position
    c4d.CallCommand(12410) # R.ecord A.ctive O.bjects

    doc.SetTime(c4d.BaseTime(20, fps))
    obj[sy.ID_BASEOBJECT_POSITION,1001]=100 # the cube's end position
    c4d.CallCommand(12410) # R.ecord A.ctive O.bjects
    c4d.CallCommand(12418) # toggle scale track back ON
    c4d.CallCommand(12419) # toggle Rotation track back ON

But there seems to be a problem(bug?) in Py4d with the time line not getting updated after the record objects command is used.
This script will ONLY work if the time line is running when you execute it.
Like I said…Something is wrong with the time line not updating properly. Or there’s a special update function that I’m not aware of to fix this problem.
But at least you’ll get the idea of what I’m doing in there.

The other way of doing this in Coffee is to first get the object’s track you want. Then get it’s curve. Then use the record objects command and you can then change the values through the various curve functions.
The big hassle while doing this in Coffee is that there’s no way to create a single key(other than this turning off certain tracks trick I posted above). And all we have to use is the record option to create keys.*YUCK!*
Which then requires a lot of extra work to remove the stuff we didn’t want keyed in the first place. By iterating through the curves and deleting stuff we didn’t want to be keyed using the DelKey() function.

I’d really love to see Sebastian post an example using the Py4D AddKey()function.
That might be a way to get around the time line not updating problem.

-ScottA