WARNING: This is an in-development library, it will not be bug free and fully featured.
    Please tweet @gadgetoid, find Gadgetoid in IRC, email Phil at Gadgetoid dot com,
    or visit http://pi.gadgetoid.com/post/039-wiringpi-version-2-with-extra-python and
    comment if you have any problems, suggestions, questions or words of support.

WiringPi: An implementation of most of the Arduino Wiring
	functions for the Raspberry Pi

WiringPi2: WiringPi version 2 implements new functions for managing IO expanders.

Testing:
    Build with gcc version 4.6.3 (Debian 4.6.3-14+rpi1)
    Built against Python 2.7.2, Python 3.2.3    

Prerequisites:
    You must have python-dev and python-setuptools installed
    If you manually rebuild the bindings with swig -python wiringpi.i

Get/setup repo:
    git clone https://github.com/Gadgetoid/WiringPi2-Python.git
    cd WiringPi2-Python
    
Build & install with:
    sudo python setup.py install

Or Python 3
    sudo python3 setup.py install

Class-based Usage:
    No classes have been created for this version yet.

Usage:
    import wiringpi2
    wiringpi2.wiringPiSetup // For sequential pin numbering, one of these MUST be called before using IO functions
    OR
    wiringpi2.wiringPiSetupSys // For /sys/class/gpio with GPIO pin numbering
    OR
    wiringpi2.wiringPiSetupGpio // For GPIO pin numbering

    Setting up IO expanders (This example was tested on a quick2wire board with one digital IO expansion board connected via I2C):
    wiringpi2.mcp23017Setup(65,0x20)
    wiringpi2.pinMode(65,1)
    wiringpi2.digitalWrite(65,1)

    General IO:
    wiringpi2.pinMode(1,1) // Set pin 1 to output
    wiringpi2.digitalWrite(1,1) // Write 1 HIGH to pin 1
    wiringpi2.digitalRead(1) // Read pin 1

    Bit shifting:
    wiringpi2.shiftOut(1,2,0,123) // Shift out 123 (b1110110, byte 0-255) to data pin 1, clock pin 2

    Serial:
    serial = wiringpi2.serialOpen('/dev/ttyAMA0',9600) // Requires device/baud and returns an ID
    wiringpi2.serialPuts(serial,"hello")
    wiringpi2.serialClose(serial) // Pass in ID

Full details at:
    http://www.wiringpi.com