run/kill a python script with another python script with help of EVDEV : bounce effect

[bbd666]

this is a basic python script to draw a frame , toto.py

from tkinter import *
from tkinter import ttk
from tkinter import font as tkFont
from PIL import Image, ImageTk
import os

os.environ['DISPLAY'] = ':0'
decal_x=410
decal_y=360

root=Tk()
root.configure(bg='blue')
window_height=350
window_width=400
style_1 = ttk.Style()
style_1.configure('TFrame',background='yellow')    
screen_width=root.winfo_screenwidth()
screen_height=root.winfo_screenheight()
x_cordinate = int((screen_width/2) - (window_width/2))
y_cordinate = int((screen_height/2) - (window_height/2))
root.geometry("{}x{}+{}+{}".format(window_width, window_height, x_cordinate+40, y_cordinate))
content = ttk.Frame(root,style='new.TFrame')
content.place(x=decal_x, y=decal_y, anchor="se", width=window_width, height=window_height)

root.mainloop()

This a python script to run and kill (alternately) toto.py by typing 0-key of the remote ctrl

import time
import evdev
import os
import subprocess

    
def get_ir_device():
        devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
        for device in devices:
            if (device.name == "gpio_ir_recv"):           
                return device          
   
    
def trig_ir():
    global last_call
    global s
    event = dev.read_one()
    result = None   
    if event is None:
        return
    else:    
     if not(event.code==0): 
      t = time.perf_counter() 
      if t - last_call > 0.5:
        print('ok')
        last_call = t
        value = event.value
        return value
                    
dev = get_ir_device()
process_pid=0
os.system('sh remote.sh')
last_call =time.perf_counter() 

while True:
    key=trig_ir()
    if (key==0):
       #print('0-key typed')
       if process_pid>0:
         os.system("pkill -f 'toto.py'")
         time.sleep(2)
         print('1 process killed')
         process_pid=0
       else:
         print('1 process launched')
         process = subprocess.Popen(["python", "toto.py"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         process_pid=process.pid

when I press 0-key it runs toto.py
if I press again 0-key, very often (not always) it stops toto.py then it restarts toto.py
pls tell me what's wrong there

[bbd666]

This code works :

import evdev
import os
import subprocess
import psutil
    
def get_ir_device():
        devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
        for device in devices:
            if (device.name == "gpio_ir_recv"):           
                return device          
   
    
def trig_ir():
    global last_call
    global s
    event = dev.read_one()
    result = None   
    if event is None:
        return
    else:    
     if not(event.code==0): 
      t = time.perf_counter() 
      if t - last_call > 0.5:
        last_call = t
        value = event.value
        return value
                    
dev = get_ir_device()
os.system('sh remote.sh')
last_call =time.perf_counter() 
processlist=list()
proc=['python','toto.py']

while True:
    key=trig_ir()
    if (key==0):
         processlist.clear()
         for process in psutil.process_iter():
           processlist.append(process.cmdline())
         if processlist.count(proc)==0:
           print('launching')
           process = subprocess.Popen(["python", "toto.py"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         else:
          os.system("pkill -f 'toto.py'")