Get User Knock data

get_Knock.py

import pifacedigitalio as pfio
import time,sys, threading, pickle

pifacedigital = pfio.PiFaceDigital()
pfio.init()

#Blink LED to let user know they can enter knock codes
def blink_LED(PIN):
	while 1:
		p = PIN
		pfio.digital_write(p, 1)
		time.sleep(.1)
		pfio.digital_write(p, 0)
		time.sleep(.1)

count = 0

#Blue LED
PIN = 4

#Blink Blue LED in a thread with its own timer
t = threading.Thread(target=blink_LED, args=(PIN,))
t.start()


#Solenoid LOW
pfio.digital_write(5, 1)
time.sleep(.1)				

print "DEVICE READY\n"
print "Please knock ONCE to enter a new code: "
one_knock = 0
while one_knock != 1:
	#Check for action on the Piezo Pad
	knock = pfio.digital_read(4,0)
	if knock == 1:
		one_knock = one_knock + 1
		print "KNOCK acknowledged!"
time.sleep(2)
print "Please enter your secret knock code. Ctrl+C to SAVE and EXIT: "
KNOCKS = {}
TIMES = []
with open("KNOCKS", "w") as K:
		
	while True:
		
		try:
			#Check for action on the Piezo Pad
			knock = pfio.digital_read(4,0)
		
			#if a knock occurs....
			if knock == 1:
				if count == 0:
					start = time.time()
					kn = "KNOCK%d" % count 
					print kn + "\n"
					#ADD TIME TO ARRAY
					TIMES.append(start)
					KNOCKS[kn] = TIMES[count]
					count = count + 1
				else:
					kn = "KNOCK%d" % count 
					print kn + "\n"
					#GET TIME OF KNOCK
					t = time.time() - start
					#ADD TIME TO ARRAY
					TIMES.append(t)
					KNOCKS[kn] = TIMES[count]
					count = count + 1
					
				#GREEN LED ON
				pfio.digital_write(6, 1)
				#RED LED OFF
				pfio.digital_write(7, 0)
				
				time.sleep(.05)
				
			else:
				#RED LED ON
				pfio.digital_write(7, 1)
				#GREEN LED OFF
				pfio.digital_write(6, 0)
								

		except KeyboardInterrupt:
			#Write knock code dict to file
			pickle.dump(KNOCKS, K)
			#General Cleanup
			pfio.deinit() 
			sys.exit()