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+--- Thread: [Tkinter] Code question (/thread-11136.html)
Code question - robgar2001 - Jun-24-2018
Hello I am a c# coder and I am learning Python so be kind please.
I just can't figure out why this code isn't working.
My intensions are to let a screen appear and when I push a button a thread gets started.
When I push another button a variable gets changed so that a led starts blinking on my raspberry pi.
import tkinter as tk
from time import sleep
import threading
from gpiozero import LED
blink=False
led=LED(14)
screen = tk.Tk()
screen.title("Control panel")
#screen.attributes('-fullscreen', True)
def click():
global blink
if blink==True:
blink=False
else:
blink=True
yaw = tk.Button(screen,text="Click for blink loop",command=click())
yaw.pack()
screen.mainloop()
def printer():
global blink
while 1:
led.on()
sleep(2)
led.off()
sleep(2)
th = threading.Thread(printer())
threads.append(th)
th.start()
RE: Code question - Barrowman - Jun-24-2018
So what does happen?
Does the LED blink? Does anything happen?
Don't forget that some of this will only work on a Pi as most here won't have a Pi to try it on anyway.
RE: Code question - wuf - Jun-24-2018
Hi robgar2001
This should work better:
import tkinter as tk
from gpiozero import LED
led = LED(14)
def blink_led(blink=True):
if blink:
led.on()
else:
led.off()
blink=not blink
screen.after(2000, blink_led, blink)
screen = tk.Tk()
screen.title("Control panel")
tk.Button(screen,text="Click for blink loop",command=blink_led).pack()
screen.mainloop()wuf ;-)