How to run a python script with a tkinter button?

Question

I have a python file named main.py which looks like this:

print('hello world')

I also have a tkinkter_run.py file which looks like this:

import sys
import os
from tkinter import *
import main

window=Tk()

window.title("Running Python Script")
window.geometry('550x200')

def run():
    os.system('main.py')

btn = Button(window, text="Run your Code!", bg="blue", fg="white",command=run)
btn.grid(column=0, row=0)

window.mainloop()

When I run my tkinker_run.py file I do get a window with a Run your Code! button, however when I click that button and look the my terminal in Visual Code I get the following error:

Hello World
'main.py' is not recognized as an internal or external command,
operable program or batch file.

So it seems that Hello World is printed before I even click the Run your Code! button. I dont understand what the problem is....

@TangerCity Also, Hello World is initially printed because you have called import main. Try using os.system(os.path.abspath('main.py')), just to make sure that the correct path is supplied. — astqx
– astqx, Commented Mar 11, 2021 at 11:10
@AST I get this when I click that run the Code! button C:\data\EK\Desktop\Python is not recognized as an internal or external command, operable program or batch file. — TangerCity
– TangerCity, Commented Mar 11, 2021 at 11:15

TangerCity · Accepted Answer · 2021-03-11 11:56:08Z

1

My directory name contains spaces, most shells split up the arguments by assuming they are separated by spaces. So the solution is to place the part that contains the filename of the script between double quotes.

os.system('python "c:\data\EK\Desktop\Python Microsoft Visual Studio\MM\main.py"')

This worked!

answered Mar 11, 2021 at 11:56

TangerCity

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2 Comments

astqx Over a year ago

In the comments I had told the same, you mentioned it did not work? Anyway, do consider using subprocess.Popen instead, if you don't want it to block the GUI's event loop.

martineau Over a year ago

If the two .py files are in the same directory, you can extract name of the folder from __file__ and add it to main.py to determine a full path to it at runtime. The will allow you to avoid hardcoding the path into your code.

Delrius Euphoria · Accepted Answer · 2021-03-11 10:01:59Z

0

This is because os.system only accepts a command and not a filename.

You can replace this code

os.system("main.py")

Like this

os.system("python main.py")

edited Mar 11, 2021 at 10:01

Delrius Euphoria

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answered Mar 11, 2021 at 9:43

user14339485

1 Comment

TangerCity Over a year ago

I get this: Hello World python: can't open file 'main.py': [Errno 2] No such file or directory So it seems that it gets printed again before I even click the run the Code! button

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