from tkinter import filedialog,Tk
from PIL import Image

root = Tk()
root.withdraw()
path = filedialog.askopenfilenames(title='选择图片文件',filetypes=[('png ','.png')],initialdir='./')

img_list=[]
for i in path:
    img=Image.open(i)
    img_list.append(img)

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