python：实时网速监控小工具

import psutil
import time
from tkinter import *

def make_app():
    app =Tk()
    app.geometry('200x100')
    app.config(bg='#303030')
    Label(text='实时网速监控',font=('Hack',23,'bold'),bg='#303030',fg='white').pack()
    Label(name='lb2',text='_kb/s'     ,font=('Hack',20,'bold'),bg='#303030',fg='white').pack()
    return app

def speed_test():

    s1 = psutil.net_io_counters(pernic=True)['以太网']
    time.sleep(1)
    s2 = psutil.net_io_counters(pernic=True)['以太网']
    result = s2.bytes_recv - s1.bytes_recv
    #除法结果保留两位小数
    return str('%.2f'%(result / 1024)) + 'kb/s'

def ui_updata(do):
    data = do()
    #app下名字是lb2的子控件
    lb2  = app.children['lb2']
    #配置，替换原来的text
    lb2.config(text=data)
    #每1秒后调用lambda:ui_updata(do)函数
    app.after(1000,lambda:ui_updata(do))

app = make_app()
#每1秒后调用ui_updata(speed_test)函数
app.after(1000,lambda :ui_updata(speed_test))
app.mainloop()