我复制了你的问题.如果对我来说，使用 %%python 魔法解决了.试试这个:

I replicated your problem. Using the %%python magic solved if for me. Try this:

%%python

from tkinter import filedialog
from tkinter import *

root = Tk()
root.filename =  filedialog.askopenfilename(initialdir = "/",title = "Select 
file",filetypes = (("jpeg files","*.jpg"),("all files","*.*"))