We are pleased to announce the release of Pyomo 4.3 (4.3.11327). Pyomo is a collection of Python software packages that supports a diverse set of optimization capabilities for formulating and analyzing optimization models.

The following are highlights of this release:

- Modeling
   * First documented release of pyomo.bilevel
   * Added an MPS writer
   * Use sparse representations for Expression and SOSConstraint components

- Solvers
   * Significant speed-up of CPLEX solver interfaces
   * Bug fixes for running solvers on NEOS
   * Many fixes to the 'sol' file reader

- Other
   * Added an MPS file writer
   * Many updates to the pyomo_install script
   * Consolidated help information in the 'pyomo help' subcommand
   * Added 'pyomo install-extras' to install optional Python packages

See http://pyomo.org for installation options and documentation for getting started with Pyomo.

Enjoy!

 - Pyomo Developer Team
 - pyomo-developers@googlecode.com
 - http://pyomo.org


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About Pyomo
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The Pyomo home page provides resources for Pyomo users:

 * http://pyomo.org

Pyomo development is hosted by Sandia National Laboratories and COIN-OR:

 * https://software.sandia.gov/pyomo 
 * https://projects.coin-or.org/Pyomo

See the Pyomo Forum for online discussions of Pyomo:

 * http://groups.google.com/group/pyomo-forum/

