Python 3 support

[vsoch]

Advice from @rwblair

http://python-future.org/compatible_idioms.html

[tangi75]

Here are the patches I've made to make expfactory-python work on Python 3 (no guarantee of completeness but you can run the tests) :

cd "python -c 'import site; print(site.getsitepackages()[0])'/expfactory/"
find . -name "*.py" | xargs sed -i -e 's/iteritems/items/g'
find . -name "*.py" | xargs sed -i -e 's/print \(.*\)$/print(\1)/'
find . -name "*.py" | xargs sed -i -e 's/SimpleHTTPServer/http.server/'
find . -name "*.py" | xargs sed -i -e 's/SocketServer/socketserver/'
sed -i -e 's/from exceptions import ValueError//' survey.py
sed -i -e 's/urllib2/urllib.request/' utils.py
sed -i -e 's/__init__/expfactory.__init__/' utils.py
sed -i -e '84s/"rb"/"r"/' utils.py
sed -i -e 's/basestring/str/' utils.py
sed -i -e '322s/^./ /' survey.py # replace leading tab with 8 spaces

[vsoch]

This is very helpful! If you've made the changes, would you like to do a pull request? If not, we can definitely get this tested soon. Just a heads up - we are going to be going into production of version 2.0 in about a month or so, which will hopefully give you much better tools for deploying these experiments.

[vsoch]

In case you haven't gotten your quota yet :)

[tangi75]

I just did the minimum hacks to make expfactory work on Python3 without caring about backward compatibility with Python2. I'll try to do a cleaner thing this week and submit a pull request.