Hi all, thanks to the great work done by Thomas Kluyver, for those of you starting to use Numpy (or other projects) on Python 3 and who wanted to have IPython as your working environment, things are getting off the ground: (py3k)amirbar[py3k]> python3 ipython.py Python 3.1.2 (release31-maint, Sep 17 2010, 20:34:23) Type "copyright", "credits" or "license" for more information. IPython 0.11.alpha1.git -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: import io In [2]: import sys In [3]: sys.ver sys.version sys.version_info In [3]: sys.version Out[3]: '3.1.2 (release31-maint, Sep 17 2010, 20:34:23) \n[GCC 4.4.5]' etc... This is still very much a work in progress, and we haven't made any official release. But there's a github repo up and running with a proper bug tracker, so by all means let us know what works and what doesnt' (and even better, join in with help!): http://github.com/ipython/ipython-py3k Our hope is to eventually merge this work into ipython proper at some point in the future, but since the history of this branch is likely to be messy (with many merges from trunk, auto-generated code and possible rebases down the road) we're keeping it in a separate repo for now. Cheers, f