Python GUI编程(Tkinter)18、Combobox下拉控件

import tkinter
from tkinter import ttk

win = tkinter.Tk()
win.title("sunck")
win.geometry("400x400+200+20")

#绑定变量
cv = tkinter.StringVar()
com = ttk.Combobox(win, textvariable=cv)
com.pack()
#设置下拉数据
com["value"] = ("黑龙江", "吉林", "辽宁")

#设置默认值
com.current(0)

#绑定事件
def func(event):
    print(com.get())
    print(cv.get())
com.bind("<<ComboboxSelected>>", func)