input: Write a function to measure the humidity and temperature using Adafruit_DHT and display it on an LCD screen.
  assert measure_humidity_and_temp() is None  # Assuming the function returns nothing
output: def measure_humidity_and_temp():
      import Adafruit_DHT
      import I2C_LCD_driver
      import time
  
      # Set the type of sensor and the pin number
      sensor = Adafruit_DHT.DHT22
      pin = 4  # Assuming the DHT sensor is connected to GPIO pin 4
  
      # Initialize the LCD display
      lcd = I2C_LCD_driver.lcd()
  
      while True:
          # Read humidity and temperature from the DHT sensor
          humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
  
          if humidity is not None and temperature is not None:
              # Display the temperature and humidity on the LCD
              lcd.lcd_display_string("Temp: {:.1f} C".format(temperature), 1)
              lcd.lcd_display_string("Humidity: {:.1f} %".format(humidity), 2)
          else:
              lcd.lcd_display_string("Failed to get data", 1)
  
          # Wait before taking the next reading
          time.sleep(2)