Temperature sensor that controls a relay

sensors.py

#!/usr/bin/python

import RPi.GPIO as GPIO
import time
import sys
import Adafruit_DHT

RELAY_OFF = GPIO.LOW
RELAY_ON = GPIO.HIGH

relay_pin = 23
humidity_sensor = Adafruit_DHT.AM2302
humidity_pin = 4
current_relay_state = RELAY_OFF
temp_min = 23.0
temp_max = 24.0

GPIO.setmode(GPIO.BCM)
GPIO.setup(relay_pin,GPIO.OUT)

try:
  while True:
    humidity, temperature = Adafruit_DHT.read_retry(humidity_sensor, humidity_pin)
    if humidity is not None and temperature is not None:
      print('Temp={0:0.1f}*  Humidity={1:0.1f}%'.format(temperature, humidity))
      if temperature < temp_min:
        current_relay_state = RELAY_ON
        print('on')
      elif temperature > temp_max:
        current_relay_state = RELAY_OFF
        print('off')

      GPIO.output (relay_pin,current_relay_state)
    else:
      print('Failed to get reading. Try again!')
    time.sleep(2)
except KeyboardInterrupt:
  GPIO.cleanup()
  print ("Bye")

Save changes into spreadsheet https://github.com/adafruit/Adafruit_Python_DHT/blob/master/examples/google_spreadsheet.py