I just remembered that we didn't have the examples converted to python 3
needs a check, I don't know what current status of the examples folders is for 2to3.
If I add the sandbox/examples on the python path, adding an __init__.py file, then the examples are translated by 2to3.
There are some refactoring errors, but I found, so far, only one py3 compatibility problem (with pandas.read_csv(urlopen(...)))
I did some search but I did not find an easy way to add additional files to the ones that are translated by 2to3.
I added support for opening URLs in newer versions of pandas that's Python 3 compatible, so we can drop this.
Update: I suggested that we write the examples so they run on python >= 2.6 without changes. (mailing list)
see also #616
Fixed during conversion to common py 2 py 3 code base