用Python写一个实时显示网速的图形程序

需要用到库

1. python3用tkinter, python2用Tkinter

2. psutil

思路

1. 利用psutil获取到第一个网卡, 然后获取传入传出的流量, 单位是字节(byte), 一般都是KB, 也就是一千个字节来显示比较普遍, 所以后面有除以1024;

2. 用while循环, 每隔一秒来刷新;

3. tkinter中按钮绑定的方法作为一个中间方法, 先开启一个线程, 然后在执行实际的代码, 这样图形界面也不会卡顿.

下面是实际的代码

# _*_ coding: utf-8 _*_
# &＃64;Author : otfsentertry:import Tkinter as tk
except ImportError:import tkinter as tk
import threading
import time
import psutil# 最后的1表示第2个网卡&＃xff0c;如果网速显示不正常&＃xff0c;可以尝试变化一下数字&＃xff0c;一般是1
key &＃61; list(psutil.net_io_counters(pernic&＃61;True).keys())[2]def seconds():in_flow &＃61; psutil.net_io_counters(pernic&＃61;True).get(key).bytes_recvout_flow &＃61; psutil.net_io_counters(pernic&＃61;True).get(key).bytes_sent    return int(in_flow), int(out_flow)class Window(tk.Tk):def __init__(self):tk.Tk.__init__(self)# self.event &＃61; eventself.geometry(&＃39;200x90&＃39;)self.val_in &＃61; tk.StringVar()self.val_out &＃61; tk.StringVar()self.label_in &＃61; tk.Label(self, text&＃61;&＃39;Incoming&＃39;)self.label_out &＃61; tk.Label(self, text&＃61;&＃39;Outgoing&＃39;)self.entry_in &＃61; tkinter.Entry(self, textvariable&＃61;self.val_in)self.entry_out &＃61; tkinter.Entry(self, textvariable&＃61;self.val_out)self.button &＃61; tkinter.Button(self, text&＃61;&＃39;Start!&＃39;,command&＃61;self.judge)self.label_in.grid(row&＃61;0, column&＃61;0)self.label_out.grid(row&＃61;1, column&＃61;0)self.entry_in.grid(row&＃61;0, column&＃61;1)self.entry_out.grid(row&＃61;1, column&＃61;1)self.button.grid(row&＃61;2, column&＃61;0)self.mainloop()def judge(self):t &＃61; threading.Thread(target&＃61;self.schedule)t.start()def schedule(self):in_old, out_old &＃61; seconds()while 1:time.sleep(1)in_new, out_new &＃61; seconds()net_in &＃61; (in_new - in_old) / 1024net_out &＃61; (out_new - out_old) / 1024net_in &＃61; str(net_in).split(&＃39;.&＃39;)[0] &＃43; &＃39;.&＃39; &＃43; str(net_in).split(&＃39;.&＃39;)[1][:2]net_out &＃61; str(net_out).split(&＃39;.&＃39;)[0] &＃43; &＃39;.&＃39; &＃43; str(net_out).split(&＃39;.&＃39;)[1][:2]self.val_in.set(str(net_in) &＃43; &＃39;KB/s&＃39;)self.val_out.set(str(net_out) &＃43; &＃39;KB/s&＃39;)in_old &＃61; in_newout_old &＃61; out_newif __name__ &＃61;&＃61; &＃39;__main__&＃39;:Window()