GIF frames deleting script.

[Ofnuts]

Pretty close. Something like this:

1. Depends if you work top down of bottom up

Code:

layers=image.layers[:] # Make a copy of the list
layers.reverse() # if working bottom up

2. Select layers

Code:

keep=3
delete=2
stride=keep+delete
deleted_layers=[layer for i in range(keep,len(layers),stride) for layer in layers[i:i+delete]]

At that point you can inspect the contents of delete_layers to make sure they are the ones

3. Delete them

Code:

for l in deleted_layers:
   image.remove_layer(l)

Coded in slo-mo (so to speak) for better readability, a tattooed Python coder would have done a one-liner