如何在 tkinter 中将单选按钮与组合框绑定？

Question

您好，我有一些带有一些值的 comobox（用户仅选择一项），我希望根据该选择，用户将被允许从单选按钮中选择多项选择。例如： elemnt 的 comobox - 用户选择一个元素，然后选择许多作物 grom 单选按钮。我无法在两者之间建立联系。请帮助我的代码：def calibration_window():    global cb_elemnt,cb_crop    top = tkinter.Toplevel (window)    top.title ("Calibration")    top.geometry ("400x400")    ttk.Label (top, text="Select an element:",font = ("Segoe UI Light", 10)).grid (column=0, row=0)    cb_elemnt = ttk.Combobox (top, values=ele_list)    cb_elemnt.grid(column=0, row=1)    ttk.Label (top, text="Select a crop:",font = ("Segoe UI Light", 10)).grid (column=2, row=0)    # connect between element comobox to the func    cb_elemnt.bind ("<<ComboboxSelected>>",set_radio)def set_radio(event):    i=0    radios=[]    for widget in radios:        widget.destroy ()    radios = []    if StringVar().get() !="N":         radio_values = pd.unique (df[df['elemnt'] == StringVar().get()]["crop"]) #take  the suitable crop from DB    else:        radio_values = pd.unique (df_nir[df_nir['elemnt'] == StringVar().get()]["crop"])    for t in radio_values:        i = i + 1        b = Radiobutton (self, text=t, variable=IntVar(), value=t)        b.grid (row=i, column=0)        radios.append(b)

Answer 1

您应该在函数之外创建您的IntVar列表和列表，这样它们就不会被垃圾收集。radio

import tkinter as tk

from tkinter import ttk

import pandas as pd

import numpy as np

#sample data

df = pd.DataFrame({"element":np.random.choice(["Elem A","Elem B","Elem C"], 20),

                   "crops": [f"Crop {i}" for i in range(20)]})

root = tk.Tk()

r_var = tk.IntVar(value=0)

radios=[]

ttk.Label(root, text="Select an element:",font=("Segoe UI Light", 10)).grid(column=0, row=0)

cb_elemnt = ttk.Combobox(root, values=df["element"].unique().tolist())

cb_elemnt.grid(column=0, row=1)

ttk.Label(root, text="Select a crop:",font=("Segoe UI Light", 10)).grid(column=2, row=0)

def set_radio(event):

    for widget in radios:

        widget.destroy()

    if cb_elemnt.get():

        radio_values = df.loc[df["element"].eq(cb_elemnt.get()),"crops"]

        for num, t in enumerate(radio_values, 1):

            b = tk.Radiobutton(root, text=t, variable=r_var, value=t)

            b.grid (row=num, column=1)

            radios.append(b)

cb_elemnt.bind ("<<ComboboxSelected>>", set_radio)

root.mainloop()