Python3-Tcl/Tk如何从filedialog获取文件名并更改标签

我正在尝试选择一个文件，并让标签显示其名称

def onOpen():
    photo_label = filedialog.askopenfilename()
    pass


#photo code
photo = PhotoImage(file="smile.png")
photo_label = Button(image=photo, command=onOpen).grid()
#I am attempting to change text=photo_label to reflect the file name
text = Label(text=photo_label) # included to show background color
text.grid()

---

您可以使用

StringVar

并将其传递给标签的

textvariable

选项，以便每次更改变量的值时，标签的文本也是：

import tkinter as tk
from tkinter import filedialog

def onOpen():
    """ Ask the user to choose a file and change the update the value of  photo_label"""
    photo_label.set(filedialog.askopenfilename())

root = tk.Tk()
# StringVar that will contain the file name
photo_label = tk.StringVar(root)

photo = tk.PhotoImage(file="smile.png")
tk.Button(root, image=photo, command=onOpen).grid()

text = tk.Label(root, textvariable=photo_label)
text.grid()

root.mainloop()

备注：

grid（）

返回

None

因此在您的代码中，

photo\u label=按钮（image=photo，command=onOpen）.grid（）

刚刚将值

None

分配给

photo\u标签