How do I redirect output of a script to a tkinter window?

Question

I am trying to click a tkinter button to open up a new tkinter window to execute a script within it all the way up to the end with a scroll bar if necessary. However, I have only succeeded this far in getting it to run in multitude of ways in a linux window and not within a tkinter window. Can someone help me with redirecting the output of this script into the toplevel window?

self.button_run = Button(self, text="RUN", width=16, command=self.callpy) self.button_run.grid(row=25, column=0, columnspan=2, sticky=(W + E + N + S)) def run_robbot(self): new = Toplevel(self) new.geometry('500x200') label = Message(new, textvariable=self.callpy, relief=RAISED) label.pack() def callpy(self): pyprog = 'check_asim.robot' call(['robot', pyprog])

In the snippet above, if I pass callpy to command in Button it runs the robot script in a linux window. If I replace it to call run_robbot which is what I want and expect, it just pops up a new window with a Message Box without running the same script passed to textvariable. I have tried Enter in place of Message Box as well.

I want callpy to be executed in Toplevel tkinter window at the click of the button. How do I do it? Any tkinter operator is fine as long as it confines to the tkinter window.

acw1668 · Accepted Answer · 2019-06-13 09:03:17Z

If you want to capture the output of the command, you should use subprocess.run(cmd,capture_output=True) instead. Below is an sample code:

import subprocess from tkinter import * class App(Tk): def __init__(self): Tk.__init__(self) Button(self, text='Run', command=self.run_robot).pack() def run_robot(self): win = Toplevel(self) win.wm_attributes('-topmost', True) output = Text(win, width=80, height=20) output.pack() output.insert(END, 'Running ....') output.update() result = self.callpy() output.delete(1.0, END) output.insert(END, result) def callpy(self): pyprog = 'check_asim.robot' return subprocess.run(['robot', pyprog], capture_output=True).stdout App().mainloop()

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