[BioPython] some files missing in sources of 1.40b and weird non-error

[Thomas Hamelryck]

Hi Kristina,

> I'm utterly confused. Does this happen because of some setting in
> biopython?

KDTree is C++ code, which causes problems on some 
systems, and hence compilation is disabled by default. Un-commenting
the KDTree lines in setup.py and re-installing will quite likely solve
your problem.

Best regards,

-Thomas