This is PADS, a library of Python Algorithms and Data Structures implemented by David Eppstein of the University of California, Irvine.

The current version of PADS may be found at <http://www.ics.uci.edu/~eppstein/PADS/>, as individual files or as a gzipped tar file in <http://www.ics.uci.edu/~eppstein/PADS/PADS.tar.gz>.

PADS is hereby placed in the public domain; you may use the code in PADS for any purpose whatsoever.  We make no guarantee of quality, completeness, correctness, persistence or consistency of APIs, or of support.