如何将 tkinter 的输出打印到 GUI 而不是 CLI? [英] How do i get the output of tkinter to print into GUI instead of CLI?

问题描述

我一直在处理此代码，并将输出发送到终端.如何在 tkinter GUI 窗口中打印输出?代码如下:

I have been working on with this code and I get my output to the terminal. How do i get the output to print in the tkinter GUI window insted? Here's the code:

import sys
import os
from tkinter import *
def ping():
    myinptext = entry.get()
    os.system("ping "+entry.get()+" -c 2" )
myGui = Tk()
entry = StringVar() 
myGui.geometry('300x300')
myGui.title("Get output inside GUI") 
mylabel = Label(myGui,text="Enter target IP or host as required.").pack() 
mybutton = Button(myGui,text ="Ping Test",command = ping).pack() 
myEntry = Entry(myGui,textvariable=entry).pack() 
myGui.mainloop()

推荐答案

使用 subprocess 而不是 os.system.有很多函数可以使用外部命令.

Use subprocess instead of os.system. There are many functions to work with external command.

我使用 subprocess.check_output() 来获取执行命令的结果.命令必须是列表 ["ping", entry.get(), "-c", "2"].如果使用 shell=True，命令可以是单个字符串.

I use subprocess.check_output() to get result of executed command. Command has to be as list ["ping", entry.get(), "-c", "2"]. Command can be single string if you use shell=True.

import tkinter as tk
import subprocess

def ping():
    cmd = ["ping", entry.get(), "-c", "2"]
    output = subprocess.check_output(cmd)
    #output = subprocess.check_output("ping {} -c 2".format(entry.get()), shell=True)

    print('>', output)
    # put result in label
    result['text'] = output.decode('utf-8')

my_gui = tk.Tk()
entry = tk.StringVar()

my_gui.geometry('300x300')
my_gui.title("Get output inside GUI") 

tk.Label(my_gui, text="Enter target IP or host as required.").pack() 
tk.Entry(my_gui, textvariable=entry).pack()
tk.Button(my_gui,text="Ping Test", command=ping).pack() 

# label for ping result
result = tk.Label(my_gui)
result.pack()

my_gui.mainloop()

顺便说一句:因为 ping 需要一些时间，所以 tkinter 将冻结这次.如果您需要非冻结版本，您将需要 subprocess 或 threading 模块中的其他功能.

BTW: because ping takes some time so tkinter will freeze for this time. If you need non-freezing version you will need other functions in subprocess or threading module.

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