python - Python如何从函数内编辑Tkinter标签？(Python How to edit a Tkinter label from within a function?)

Question

I need to change a Tkinter label from inside a function but it isn't passing through correctly because I get the error

(我需要从函数内部更改Tkinter标签，但它无法正确传递，因为出现错误)

AttributeError: 'NoneType' object has no attribute 'config'

(AttributeError：“ NoneType”对象没有属性“ config”)

My code is

(我的代码是)

from Bio.Seq import Seq
from Bio.Alphabet import IUPAC
from Bio import SeqIO
from tkinter import *
from tkinter import ttk, filedialog
import os

def select_file(fileLabel):
    filename = filedialog.askopenfilename(initialdir=".")
    name, extension = os.path.splitext(filename)
    extension=''.join(extension.split('.', 1))
    for seq_record in SeqIO.parse(filename, extension):
        sequence = seq_record.seq
    fileBase=os.path.basename(os.path.normpath(filename))
    fileLabel.config(text=fileBase)


tk = Tk()

fileLabel = ttk.Label(text = "No File Selected").pack()

ttk.Button(text = "Select FASTA/Genbank",command = lambda: select_file(fileLabel)).pack()

tk.mainloop()

Does anyone know what I'm doing wrong?

(有人知道我在做什么错吗？)

Edit: The error is on the line

(编辑：错误在行)

fileLabel.config(text=fileBase)

  ask by Jack Ashford translate from so

Answer 1

Try this :

(尝试这个 ：)

fileLabel = ttk.Label(text = "No File Selected")
fileLabel.pack()