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expand_y breaks Push() #85

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@TwonkyHardware

FreeSimpleGUI version 5.2.0.post1
Python version 3.10.12 on Ubuntu 22.04

I have had difficulty making the Push() function work as the documentation describes. The following code shows the issue. The intent is to have two columns, one containing a Listbox of fruit justified to the left edge of the window and the other containing a Listbox of playing cards justified to the right edge of the window.

When both columns have expand_y = True, the resulting GUI has both columns justified to the left despite having a Push() between them in the window layout. If I comment out the expand_y = True line from the Cards Column (just below the line # This breaks Push()), then suddenly the Push() works and the Cards Column is justified to the right edge. Of course, it is no longer extended vertically the way I want it.

Sample code:

import FreeSimpleGUI as sg

default_font = ("Arial", 16)

### FRUIT COLUMN ###
fruit_header = sg.Text('Fruit', justification = 'center', expand_x = True)
fruit_listbox = sg.Listbox(values = ['apple', 'banana', 'clementine', 'durian'],
                           key = '-FRUIT-', size = (40, None) )

fruit_column = sg.Column( [ [fruit_header], [fruit_listbox] ],
                          expand_y=True,
                          background_color = 'orange')

### CARDS COLUMN ###
cards_header = sg.Text('Cards', justification = 'center', expand_x = True)
cards_listbox = sg.Listbox(values = ['King', 'Queen', 'Eight', 'Joker'],
                           key = '-CARDS-', size = (40, None) )

cards_column = sg.Column( [ [cards_header], [cards_listbox] ],
                          # This breaks Push()
                          expand_y = True,
                          background_color = 'purple')

layout = [ [fruit_column, sg.Push(), cards_column] ]

# Create the Window
window = sg.Window('Justification Test', layout, resizable=True, finalize=True,
                   size=sg.Window.get_screen_size(), location=(0,0),
                   font = default_font)

window.bind('<Escape>', '-ESCAPE-')

# Event Loop to process "events" and get the "values" of the inputs
while True:

    event, values = window.read()
    if event in (sg.WIN_CLOSED, '-ESCAPE-'):
        break

window.close()

Is there a way to have both columns extend the entire height of the window while also being justified to opposite edges horizontally?

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