Took a little longer to write this than expected, but here it is: a working pypi2guix script! http://paste.lisp.org/display/143606
Stefano Costa, Evan Prodromou, jrobb, Christopher Allan Webber likes this.
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Missing a license.
That's the first thing that I thought about after I posted it. It's GPLv3, fwiw. I will have a git repository for this eventually complete with copyright information.