from pyfirmata import Arduino, util
board = Arduino('/dev/ttyACM0')  # Change to match your port
it = util.Iterator(board)
it.start()





while True:
  # The if statement checks a condition and executes the
  # following block of code if the condition is true.
  # Returns true if the sensor is sensing something.
  if digital_read_pin_2.read():

# Initialise the program settings and configurations
PORT = "YOUR_PORT_HERE"
board = pyfirmata.Arduino(PORT)

#Start the iterator thread to read inputs
it = pyfirmata.util.Iterator(board)
it.start()