Update btns.py

btns.py

 import RPi.GPIO as GPIO # Import Raspberry Pi GPIO library
-def button_callback(channel):
-    print("Button was pushed!")
-GPIO.setwarnings(False) # Ignore warning for now
-GPIO.setmode(GPIO.BOARD) # Use physical pin numbering
-GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 10 to be an input pin and set initial value to be pulled low (off)
-GPIO.add_event_detect(13,GPIO.RISING,callback=button_callback) # Setup event on pin 10 rising edge
-message = input("Press enter to quit\n\n") # Run until someone presses enter
-GPIO.cleanup() 
\ No newline at end of file
+
+
+  try:
+    GPIO.setwarnings(False) # Ignore warning for now
+    GPIO.setmode(GPIO.BOARD) # Use physical pin numbering
+    GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 22 to be an input pin and set initial value to be pulled low (off)
+    GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 23 to be an input pin and set initial value to be pulled low (off)
+    GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 24 to be an input pin and set initial value to be pulled low (off)
+    GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 26 to be an input pin and set initial value to be pulled low (off)
+    while True: # Run forever
+        if GPIO.input(13) == GPIO.HIGH:
+            print("no")
+            break
+        if GPIO.input(15) == GPIO.HIGH:
+            print("down")
+            break
+        if GPIO.input(16) == GPIO.HIGH:
+            print("up")
+            break
+        if GPIO.input(18) == GPIO.HIGH:
+            print("yes")
+            break
+  finally:
+    print("pressed")  
+    GPIO.cleanup()