ANN is licensed under the LGPL and we've licensed the scikits.ann wrapper under the BSD license. If you need a kd-tree implementation for Python/numpy, check it out.
Tuesday, January 1, 2008
Our Python wrapper for David Mount and Sunil Arya's Approximate Nearest Neighbor (ANN) library is now in the scikits repository at scipy.org. The scikits.ann module is a SWIG-generated Python wrapper for the ANN library. It provides a numpy-compatible immutable kd-tree implementation which can perform k-nearest neighbor and approximate k-nearest neighbor searches. It currently builds on unix/OS X and I'm working to incorporate Jose Martin's contributions to get things building on Windows with MinGW.