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'")