Python Tkinter window running Tcl script

get_window_geometry

#!/usr/bin/tcsh -f
set w=`xdotool getwindowfocus`
set g=`xdotool getwindowgeometry $w | grep : \
      | sort | awk '{print $2}' | tr '\012' ' ' | sed -e 's/ /+/' -e 's/,/+/' -e 's/$//'`
echo $g

mytcl.tcl

#!/usr/bin/tclsh
package require Tclx
while {1} {
    sleep 1
    puts "Waiting for keypress..."
}

pytclsub.py

#!/usr/bin/python3.11
from functools import partial
from os import kill,_exit,system
from os.path import realpath, split
from pynput.keyboard import Listener
from signal import SIGINT
from subprocess import Popen
from sys import argv
from tkinter import Button, Text, Tk
import sh

class Process:
    def __init__(self): self._pid = 0
    def get(self): return self._pid

def run_process(script,p): p = Popen(script).pid

def kill_process(pinst,key):
    print('You pressed ', key)
    kill(pinst.get(), SIGINT)
    _exit(0)

parent_window_geometry=sh.get_window_geometry()
g_split0=parent_window_geometry.split('\n')[0].split('x')
g_split1=g_split0[1].split("+")
w=int(g_split0[0])
h=int(g_split1[0])
x=int(g_split1[1])
y=int(g_split1[2])
root_w=400
root_h=40
root_x=int(x+w/2-root_w/2)
root_y=int(y+h/2-root_h/2)
p = Process()
listener = Listener(on_press=partial(kill_process, p)).start()
print("Started keyboard listener")
script_name="mytcl.tcl"
tcl_script=split(realpath(argv[0]))[0] + "/" + script_name
root = Tk()
root.title("Example of running external process")
Button(root, text="Run Tcl script " + script_name, command=lambda: run_process(tcl_script,p)).pack()
root.geometry(str(root_w)+'x'+str(root_h)+'+'+str(root_x)+'+'+str(root_y))
root.mainloop()

runme

#!/usr/bin/tcsh -f
set script_realpath=`realpath $0`
set script_path=$script_realpath:h
env PATH=${script_path}:/usr/bin:/bin pytclsub.py