Py3k support

[rodolfo3]

Pingo is not compatible with Python3:

$ pip install pingo
Downloading/unpacking pingo
  Downloading pingo-0.1.9.tar.gz
  Running setup.py (path:/home/rodolfo/.virtualenvs/pingo-pong/build/pingo/setup.py) egg_info for package pingo

Installing collected packages: pingo
  Running setup.py install for pingo

      File "/home/rodolfo/.virtualenvs/pingo-pong/lib/python3.4/site-packages/pingo/rpi/spi/mcp3008.py", line 68
        print display.format(count, res, volts, ticks)
                    ^
    SyntaxError: invalid syntax

[ramalho]

Rodolfo, thanks for your interest! The primary goal of Pingo is to support the Python version available in mini-PCs. Some of them, like the Raspberry Pi, come with Python 2 and Python 3 installed, but some others, like the Arduino Yun or the Intel Galileo, come only with Python 2, so we decided to support Python 2 first. We'd like to make the code compatible with Python 3 as well, but without losing Python 2 compatibility. So that is more work. If you'd like to contribute, please send patches. Meanwhile, thanks for your interest in Pingo!

[Vido]

@rodolfo3, try using virtualenv:

virtualenv --python=/usr/bin/python2.7 my_env
source my_env/bin/activate
pip install pingo

[vmesel]

After some time, I will try to port pingo to Python 3. @rodolfo3

[s-celles]

I suggest you to have a look at #100
and this PR #103

an other PR is waiting to be merged #109 by pingo team