buttongame2.py

# created as part of the Future Learn course on Physical Computing with Raspberry Pi
# prompts user to press a button when an LED lights and stores the reaction time.  This is done
# 5 times, an average taken which is printed to screen then posted as a status update on Twitter

from gpiozero import LED
from gpiozero import Button
from time import sleep, time
from random import randint
import sys
from twython import Twython

# create a new application in twitter and put the info in below
CONSUMER_KEY = ''
CONSUMER_SECRET = ''
ACCESS_KEY = ''
ACCESS_SECRET = ''

api = Twython(CONSUMER_KEY,CONSUMER_SECRET,ACCESS_KEY,ACCESS_SECRET)

red_led = LED(27)
btn = Button(4)
attempts = 5
total_reaction_time = 0

for i in range(attempts):
        print ('')
        print ('press the button when the LED goes on')
        sleep(randint(1,10))
        red_led.on()
        start=time()
        btn.wait_for_press()
        red_led.off()
        reaction_time = time() - start
        print ('You took', reaction_time, 'seconds')
        total_reaction_time = (total_reaction_time + reaction_time)

msg = 'According to my RPi, my average reaction time is ' + str(total_reaction_time/attempts) + ' seconds #picademy'

print msg
api.update_status(status=msg)