[Python] tkinter 之 Listbox & Combobox

示例：

#用户界面
import os
os.chdir('F:\spyder_workspace\ColCal')
import Main
from tkinter import *
from tkinter import ttk

root = Tk()
root.title("window")
root.geometry('500x500')
#创建标签
var1 = StringVar()
l = Label(root, bg='green', fg='yellow',font=('Arial', 12), width=10, textvariable=var1)
l.pack()
#列表框点击事件
def print_lb1():
    value = lb1.get(lb1.curselection())
    var1.set(value)
#列表框点击按钮
b1 = Button(root,text='print selection lb',width=18,height=2,command=print_lb1)
b1.pack()
#创建Listbox
var_lb1 = StringVar()
var_lb1.set(('C30','C35','C40'))
lb1 = Listbox(root,listvariable = var_lb1)
lb1.pack()

#组合框点击事件
def print_cb1():
    value = cb1.get()
    var1.set(value)
#组合框点击按钮
b2 = Button(root,text='print selection cb',width=18,height=2,command=print_cb1)
b2.pack()
#创建Combobox
var_cb1 = StringVar()
var_cb1.set('请选择混凝土标号')
cb1 = ttk.Combobox(root,textvariable=var_cb1)
cb1['values']=['C30','C35','C40']
cb1.pack()
#事件循环
root.mainloop()