dh.py

#!/usr/bin/python
import time
import Adafruit_CharLCD as LCD
import Adafruit_DHT
sensor = Adafruit_DHT.DHT11
pin = 23
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
# Raspberry Pi pin configuration:
lcd_rs = 24
lcd_en = 25
lcd_d4 = 17
lcd_d5 = 27
lcd_d6 = 22
lcd_d7 = 10
lcd_backlight = 2
lcd_columns = 16 #Lcd column
lcd_rows = 2 #number of LCD rows

lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7,
                           lcd_columns, lcd_rows, lcd_backlight)

# Print a two line message
lcd.message('Hello\nworld!')

# Wait 5 seconds
time.sleep(2)
lcd.clear()
lcd.message('humidity,temperature')
while True:
    if humidity is not None and temperature is not None:
        print('Temp={0:0.1f}*C  Humidity={1:0.1f}%'.format(temperature, humidity))
        lcd.message(str(temperature))
        time.sleep(5.0)
        lcd.clear()
        lcd.message(str(humidity))
        time.sleep(2)
        lcd.clear()
        lcd.message('humidity,temperature')

    else:
        print('Failed to get reading. Try again!')
    lcd.clear()