# create a window with a button that closes the window when clicked
window = cmds.window(title='example window') # create the window
layout = cmds.columnLayout(adjustableColumn=True) # add a vertical layout
def close_window(*_):
cmds.deleteUI(window) # deletes the window above
button = cmds.button(label= 'press to close", command = close_window)
# show the window
cmds.showWindow(window)