For the record, from time to time I return to pick a few things again from this. Today I remembered that curves could be evaluated so I went back and behold, its there. Great and helpful tutorial, thank you!

for lazy ones as me:

import bpy
reset_to = 1.0
for object in bpy.context.selected_objects:
    # in case the object is not animated, we should also change its y-coordinate
    object.location.y = reset_to
    if not object.animation_data or not object.animation_data.action:
        # no action so nothing to do
        continue
    action = object.animation_data.action
    fcurve = action.fcurves.find('location', index=1)
    if not fcurve:
         # y location not animated so nothing left do
         continue
    for keypoint in fcurve.keyframe_points:
        keypoint.co.y = reset_to
    fcurve.update()

Sybren very nice video,

I am missing only how to insert a new keyframe at say time 60 in the timeline ...

As the title says: existing ke;yframes , so my wish is something new ;-)

oh oh the triple ` does not as im MD.

Possible here? If so, please tell me Greets Peter

still waiting for tech9ne

Thank you once again Sybren, this wasn't easy to figure out alone but with this tutorial a n entire array of possilibities is opened up to me.

is there a blend file containing the suzanne animation that is being corrected here?

Very nice explanation! Thank you Dr.