有如下Python代码：

def f(*args):
    print(comboxlist.get()) #打印选中的值
import tkinter as tk
from tkinter import ttk
root=tk.Tk() #构造窗体
comboxlist=ttk.Combobox(root)
comboxlist["values"]=("a","b","c","d")
comboxlist.current(0)
comboxlist.bind("<<ComboboxSelected>>",f)
comboxlist.pack()