[timetemp] python script for Raspberry Pi to display time and temp on 7-segment display

timetemp.py

#!/usr/bin/env python
# element14 Blog post: 
#     http://www.element14.com/community/groups/raspberry-pi/blog/2012/09/26/time-temp-display-for-raspberry-pi
# Based on Simon Monk's library:
#     http://www.doctormonk.com/2012/08/led-clock-using-raspberry-pi.html
#
import i2c7segment as display
import time
import sensors
from time import sleep
import os
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.IN)

disp = display.Adafruit7Segment()

while True:
   if ( GPIO.input(23) == False ):
       temp = 0.0
       sensors.init()
       try:
           for chip in sensors.iter_detected_chips():
               for feature in chip:
                   temp = '%.2f' % ( feature.get_value() * 9/5 + 32 )
       finally:
           sensors.cleanup()

       disp.print_str(temp);
       disp.write_display()
       time.sleep(3)
       disp.write_digit_raw(0,0);
       disp.write_digit_raw(1,0);
       disp.write_digit_raw(2,0);
       disp.write_digit_raw(4,0);

   h = time.localtime().tm_hour
   m = time.localtime().tm_min
   disp.print_int(h * 100 + m)
   disp.draw_colon(True)
   disp.write_display()
   time.sleep(0.5)
   disp.draw_colon(False)
   disp.write_display()
   time.sleep(0.5)