按tkinter按钮启动子进程

Question

我目前是Python和编码的新手，只是想在点击时尝试制作4个按钮的布局打开不同的程序。截至目前，我的代码如下所示。

from tkinter import *
import os
import subprocess
root=Tk()
root.geometry('750x650')
root.title('Test')
topFrame = Frame(root)
topFrame.pack(side=TOP, fill='both')
bottomFrame = Frame(root)
bottomFrame.pack(side=BOTTOM, fill='both')


button1 = Button(topFrame, text="Button1", fg="black")
button2 = Button(topFrame, text="Button2", fg="black")
button3 = Button(bottomFrame, text="Button3", fg="black")
button4 = Button(bottomFrame, text="Button4", fg="black")
button1.config(height=21, width=52)
button2.config(height=21, width=52)
button3.config(height=21, width=52)
button4.config(height=21, width=52)


button1.pack(side='left', fill='both')
button2.pack(side='right', fill='both')
button3.pack(side='left', fill='both')
button4.pack(side='right', fill='both')
app = Application(root)
root.mainloop()

有什么建议？

Answer 1

运行子进程，并将回调链接到tkinter按钮是两回事;

首先，我将解决链接回调的问题：在这里，当您按下按钮时，我们将在控制台中打印launching 1。

import os
import subprocess
import tkinter as tk


def launch_1():             # function to be called
    print('launching 1')

root = tk.Tk()
root.geometry('750x650')
root.title('Launch Test')


button1 = tk.Button(root, text="Button1", command=launch_1)  # calling from here when button is pressed
button1.pack(side='left', fill='both')

root.mainloop()

---

输出是：

launching 1

---

现在让我们启动一个子流程;例如ping堆栈溢出。 example taken from here.

import os
import subprocess

import tkinter as tk


def launch_1():
    print('launching 1')    # subprocess to ping host launched here after
    p1 = subprocess.Popen(['ping', '-c 2', host], stdout=subprocess.PIPE)
    output = p1.communicate()[0]
    print(output)

root = tk.Tk()
root.geometry('750x650')
root.title('Launch Test')


button1 = tk.Button(root, text="Button1", command=launch_1)
button1.pack(side='left', fill='both')

host = "www.stackoverflow.com"        # host to be pinged

root.mainloop()

---

输出现在是：

launching 1
b'PING stackoverflow.com (151.101.65.69): 56 data bytes\n64 bytes from 151.101.65.69: icmp_seq=0 ttl=59 time=166.105 ms\n64 bytes from 151.101.65.69: icmp_seq=1 ttl=59 time=168.452 ms\n\n--- stackoverflow.com ping statistics ---\n2 packets transmitted, 2 packets received, 0.0% packet loss\nround-trip min/avg/max/stddev = 166.105/167.279/168.452/1.173 ms\n'

---

您可以根据需要添加更多具有更多操作的按钮。