loop_size = 10 #Animation Number (アニメーションさせる枚数)
create_mcmeta = True #Please select True or Flase (mcmetaのファイルを自動生成させるか True 又は False)

def mcmeta_file():
    if create_mcmeta == False:
        pass
    else:
        with open("{}.mcmeta".format(image.filename), mode='w') as f:
            f.write("{\n")
            f.write("  \'animation\': {\n")
            f.write("    \"frametime\": 2, #Animation speed\n")
            f.write("    \"frames\": [\n")
            for loopnum in range(loop_size + 1):
                if loopnum == loop_size:
                    f.write("      {}\n".format(loopnum))
                else:
                    f.write("      {},\n".format(loopnum))
            f.write("    ]\n")
            f.write("  }\n")
            f.write("}")
        print("mcmeta file created")
        print("mcmetaファイルを生成しました。\n({}.mcmeta)".format(image.filename))

loop_size -= 1
image = gimp.image_list()[0]
pdb.gimp_image_convert_rgb(image)
pdb.gimp_image_resize(image, image.width, image.height * (loop_size + 1), 0, 0)

for copy in range(loop_size):
    new_image = image.layers[0].copy(1)
    image.add_layer(new_image, 0)
    del new_image

layer_width = image.layers[0].width
offset_layer = layer_width

for loop in reversed(range(loop_size)):
    if loop == loop_size:
        continue
    image.layers[loop].set_offsets(0, offset_layer)
    offset_layer += layer_width

#Press enter to create mcmeta file
#エンターを押すとmcmetaファイルが生成されます

mcmeta_file()