from tkinter import filedialog
from PIL import Image
oath=filedialog.askopenfilenames(title="阿巴阿巴阿巴",
                      filetypes=[('All Files', '*')],
                      initialdir="./")
ll=[]
for i in oath:
    im=Image.open(i)
    ll.append(im)

ll[0].save("bot.gif",save_all=True,append_images=ll[1:])