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。radioimport tkinter as tkfrom tkinter import ttkimport pandas as pdimport numpy as np#sample datadf = pd.DataFrame({"element":np.random.choice(["Elem A","Elem B","Elem C"], 20),&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;"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):&nbsp; &nbsp; for widget in radios:&nbsp; &nbsp; &nbsp; &nbsp; widget.destroy()&nbsp; &nbsp; if cb_elemnt.get():&nbsp; &nbsp; &nbsp; &nbsp; radio_values = df.loc[df["element"].eq(cb_elemnt.get()),"crops"]&nbsp; &nbsp; &nbsp; &nbsp; for num, t in enumerate(radio_values, 1):&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; b = tk.Radiobutton(root, text=t, variable=r_var, value=t)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; b.grid (row=num, column=1)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; radios.append(b)cb_elemnt.bind ("<<ComboboxSelected>>", set_radio)root.mainloop()