Sure, I can add frames manually in the keyframe editor, etc, but I was asking if there was a way to add frames from within a running Python script. Let's say that the user starts my script with a current frame of 30 out of 50 total and the script generates 30 frames of output. I would want to ask if it's ok to add 10 frames just like applying a multi-frame pose asks if it's ok to increase the number of frames.