Issue
I am developing an app to monitor the office light system. I am using Tkinter to develop GUI, I try to run a loop within a button command and it freezes my GUI. So I read a little about the treading module.
I want to use the value returning from my variable var in a loop. I try as you can see below, but the function enable_automatico doesn't call my thread function acionamento_automatico. I don't get any error>
#!/usr/bin/python3
# Importando os pacotes
import sys
import time
import threading
import RPi.GPIO as GPIO
from tkinter import ttk
from tkinter import*
import tkinter as tk
from tkinter import messagebox
#Configurando a I/O
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
#Configurando os pinos de Entrada
GPIO.setup(18, GPIO.IN) #Sensor de Presença Vendas
GPIO.setup(23, GPIO.IN) #Sensor de Luminosidade Vendas
GPIO.setup(24, GPIO.IN) #Sensor de Presença Engenharia
GPIO.setup(25, GPIO.IN) #Sensor de Luminosidade Engenharia
GPIO.setup(12, GPIO.IN) #Sensor de Presença Compras
GPIO.setup(16, GPIO.IN) #Sensor de Luminosidade Compras
GPIO.setup(20, GPIO.IN) #Sensor de Presença Marketing
GPIO.setup(21, GPIO.IN) #Sensor de Luminosidade Marketing
#Configurando os pinos de Saída
GPIO.setup(17, GPIO.OUT)#Luminária A Vendas
GPIO.setup(27, GPIO.OUT)#Luminária B Vendas
GPIO.setup(22, GPIO.OUT)#Luminária A Engenharia
GPIO.setup(5, GPIO.OUT) #Luminária B Engenharia
GPIO.setup(6, GPIO.OUT) #Luminária A Compras
GPIO.setup(13, GPIO.OUT)#Luminária B Compras
GPIO.setup(19, GPIO.OUT)#Luminária A Marketing
GPIO.setup(26, GPIO.OUT)#Luminária B Marketing
#Configurando os pinos de saída para o modo de operação manual
GPIO.output(17, GPIO.LOW)#Luminária A Vendas
GPIO.output(27, GPIO.LOW)#Luminária B Vendas
GPIO.output(22, GPIO.LOW)#Luminária A Engenharia
GPIO.output(5, GPIO.LOW) #Luminária B Engenharia
GPIO.output(6, GPIO.LOW) #Luminária A Compras
GPIO.output(13, GPIO.LOW)#Luminária B Compras
GPIO.output(19, GPIO.LOW)#Luminária A Marketing
GPIO.output(26, GPIO.LOW)#Luminária B Marketing
#Definição da fonte de texto
LARGE_FONT = ("Verdana", 22)
MEDIUM_FONT = ("Verdana", 16)
SMALL_FONT = ("Verdana", 12)
#A class thread
class MyThread(threading.Thread):
def __init__(self, threadID, name, counter):
threading.Thread.__init__(self)
self.threadID = threadID
selfname = name
self.counter=counter
def acionamento_automatico(thread1, counter):
while (app.frames[Acionamento].var.get()==2):
if ((GPIO.input(18)==False) and (GPIO.input(23)==False)):
GPIO.output(17, GPIO.HIGH)
GPIO.output(27, GPIO.LOW)
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.label6.configure(text="Ligado")
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.label7.configure(text="Desligado")
if ((GPIO.input(18)==True) and (GPIO.input(23)==False)):
GPIO.output(17, GPIO.LOW)
GPIO.output(27, GPIO.LOW)
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.label6["text"]="Desligado"
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.label7["text"]="Desligado"
if ((GPIO.input(18)==False) and (GPIO.input(23)==True)):
GPIO.output(17, GPIO.HIGH)
GPIO.output(27, GPIO.HIGH)
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.label6["text"]="Ligado"
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.label7["text"]="Ligado"
if ((GPIO.input(18)==True) and (GPIO.input(23)==False)):
GPIO.output(17, GPIO.LOW)
GPIO.output(27, GPIO.LOW)
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.label6["text"]="Desligado"
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.label7["text"]="Desligado"
thread1.exit()
#Habilitar modo automático
def enable_automatico():
automatico_message = messagebox.showinfo(title="Modo Automático", message = "O acionamento das luminárias será feito conforme luminosidade e pessoas no setor, resultando num menor consumo de energia")
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.lev_button.configure(state=DISABLED)
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.ldv_button.configure(state=DISABLED)
app.frames[Acionamento].engenhariaFrame.luminaria_esquerdaFramee.lee_button.configure(state=DISABLED)
app.frames[Acionamento].engenhariaFrame.luminaria_direitaFramee.lde_button.configure(state=DISABLED)
app.frames[Acionamento].comprasFrame.luminaria_esquerdaFramec.lec_button.configure(state=DISABLED)
app.frames[Acionamento].comprasFrame.luminaria_direitaFramec.ldc_button.configure(state=DISABLED)
app.frames[Acionamento].marketingFrame.luminaria_esquerdaFramem.lem_button.configure(state=DISABLED)
app.frames[Acionamento].marketingFrame.luminaria_direitaFramem.ldm_button.configure(state=DISABLED)
app.frames[Acionamento].vendasFrame.luminaria_esquerdaFramev.lev_button.update()
app.frames[Acionamento].vendasFrame.luminaria_direitaFramev.ldv_button.update()
app.frames[Acionamento].engenhariaFrame.luminaria_esquerdaFramee.lee_button.update()
app.frames[Acionamento].engenhariaFrame.luminaria_direitaFramee.lde_button.update()
app.frames[Acionamento].comprasFrame.luminaria_esquerdaFramec.lec_button.update()
app.frames[Acionamento].comprasFrame.luminaria_direitaFramec.ldc_button.update()
app.frames[Acionamento].marketingFrame.luminaria_esquerdaFramem.lem_button.update()
app.frames[Acionamento].marketingFrame.luminaria_direitaFramem.ldm_button.update()
global thread1
thread1 = MyThread(1, "Thread-1", 1)
thread1.start()
Solution
Thread runs code which is in its function run() but you don't have it
from threading import Thread
import time
# -----
def my_function(name, counter):
for x in range(counter):
print(name, x)
time.sleep(0.5)
# -----
class MyThread(Thread):
def run(self):
my_function("Hello", 10)
# -----
thread = MyThread()
thread.start()
Or you can do it shorter
from threading import Thread
import time
# -----
def my_function(name, counter):
for x in range(counter):
print(name, x)
time.sleep(0.5)
# -----
thread = Thread( target=my_function, args=("World", 10) )
thread.start()
EDIT: example how to control thread and stop it.
BTW: In some situations you should use queue to communicate with thread. Only main thread should use print() and works with GUI like tkinter
from threading import Thread
import time
# -----
def my_function(name, counter):
for x in range(counter):
if stop:
print('STOP')
break
print(name, x)
time.sleep(0.5)
# -----
stop = False
thread = Thread( target=my_function, args=("World", 20) )
print("alive 0:", thread.is_alive()) # False
thread.start()
print("alive 1:", thread.is_alive()) # True
time.sleep(2)
print("alive 2:", thread.is_alive()) # True
time.sleep(2)
print("alive 3:", thread.is_alive()) # True
stop = True
print("alive 4:", thread.is_alive()) # True
time.sleep(2)
print("alive 5:", thread.is_alive()) # False
# wait till thread ends
thread.join()
print("alive 5:", thread.is_alive()) # False
Answered By - furas