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I am hoping someone can help me.

Basically, I have an arbitrary script, in this script, there are many functions and after each function is executed, print() is executed as well to give me an update. I'm using the Pysimplegui library for GUI, and was wondering if someone can help or explain what I can do to show the print output in the GUI

Alexey Podoynitsyn
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  • Word of caution should be added here..... if `print` is called from a thread and the stdout has been rerouted to output in a PySimpleGUI window, then the odds are very high that the program will crash. – Mike from PSG May 07 '23 at 12:13

3 Answers3

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There are a few ways to do this that are in the documentation, here is one way.

import PySimpleGUI as sg

# This is the normal print that comes with simple GUI
sg.Print('Re-routing the stdout', do_not_reroute_stdout=False)

# this is clobbering the print command, and replacing it with sg's Print()
print = sg.Print

# this will now output to the sg display.
print('This is a normal print that has been re-routed.')

Here is the example output

enter image description here

nycynik
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you can utilize Multiline object and it's method Multiline.print then just monkey patch it like this:

print = Multiline.print

ready window looks like this:

import PySimpleGUI as sg

logwindow = sg.Multiline(size=(70, 20), font=('Courier', 10))
print = logwindow.print
layout = [[logwindow]]

# Create the window
window = sg.Window("Demo", layout, finalize=True)

# Create an event loop
while True:
    event, values = window.read(timeout=1)
    for i in range(100):
        print(f'print {i}')
    if event == sg.WIN_CLOSED:
        break

window.close()

enter image description here

adamczarnecki
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Whenever you are going to use any library, first read the docs. I am sure you can find your answer. https://pysimplegui.readthedocs.io/en/latest/

Mani
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    Hello Mani Faridi, I hope you are doing well, I was not able to find an answer to my question in the documentation along with the cookbook. – Alexey Podoynitsyn Feb 26 '21 at 08:34
  • @AlexeyPodoynitsyn Thanks. Actually, I haven't worked with this library. But looks like nycynik answered your question. – Mani Feb 26 '21 at 08:42
  • Right instincts. There's a section in the Cookbook on "printing" https://www.pysimplegui.org/en/latest/cookbook/#recipe-printing – Mike from PSG May 08 '23 at 13:01