from gltflib import GLTF, FileResource

gltf = GLTF.load('./AnimatedCube/AnimatedCube.gltf')

model = gltf.clone()
resource = FileResource("/Users/gibbon/Desktop/hippo.jpg")
model.resources.append(resource)

model.model.images[0].uri = "/Users/gibbon/Desktop/hippo.jpg"

model.export("toto.glb")