$sudo apt-get update
$sudo apt-get install python-dev
$wget http://dl.linux-sunxi.org/users/tom/pySUNXI-0.1.12.tar.gz
$tar zxf pySUNXI-0.1.12.tar.gz
$sudo python setup.py install

Using the PD0 and VCC-5V for test

#!/usr/bin/env python

import SUNXI_GPIO as GPIO
import time

RED_LED = GPIO.PD0

GPIO.init()
GPIO.setcfg(RED_LED, GPIO.OUT)

while True:
        GPIO.output(RED_LED, GPIO.HIGH)
        time.sleep(1)
        GPIO.output(RED_LED, GPIO.LOW)
        time.sleep(1)

$chmod +x blink.py
$sudo ./blink.py

The red led is blinking in cycle time.