This is yapps2, Yet Another Python Parser System,
written by Amit J. Patel <amitp@theory.stanford.edu>.

It was packaged for Debian by Matthias Urlichs <smurf@debian.org>
on Fri, 14 May 2004.

The original source can be found at:
    http://theory.stanford.edu/~amitp/yapps/yapps2.1.1.zip

The original copyright notice states:

# Yapps 2 - yet another python parser system
# Copyright 1999-2003 by Amit J. Patel <amitp@cs.stanford.edu>
#
# This version of Yapps 2 can be distributed under the
# terms of the MIT open source license, either found in the LICENSE file
# included with the Yapps distribution
# <http://theory.stanford.edu/~amitp/yapps/> or at
# <http://www.opensource.org/licenses/mit-license.php>

The LICENSE file states:
  <http://www.opensource.org/licenses/mit-license.php>

  Permission is hereby granted, free of charge, to any person obtaining 
  a copy of this software and associated documentation files (the 
  "Software"), to deal in the Software without restriction, including 
  without limitation the rights to use, copy, modify, merge, publish, 
  distribute, sublicense, and/or sell copies of the Software, and to 
  permit persons to whom the Software is furnished to do so, subject to 
  the following conditions: 

  The above copyright notice and this permission notice shall be included 
  in all copies or substantial portions of the Software. 

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.