We are pleased to announce the release of Pyomo 5.7.2.

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 the 5.7 release series:

 - Adding a logical expression system
 - Standardizing component initialization
 - Distribution of Cythonized wheels
 - Reimplementation of the core Set component
 - Improved direct and persistent interfaces to Xpress & MOSEK
 - Adding support for Python 3.9
 - Deprecating pyomo-extras
 - Numerous bug fixes

A full list of updates and changes is available in the CHANGELOG.txt

ADVANCE CHANGE NOTICE:
 - This is the last Pyomo release to support Python 2.7, 3.4, and 3.5
 - This is the last Pyomo release to bundle PySP
 - This is the last Pyomo release that will have a strict PyUtilib dependency

Enjoy!

 - Pyomo Developer Team
 - pyomo-developers@googlegroups.com
 - https://www.pyomo.org


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

 * https://www.pyomo.org

Pyomo development is hosted at GitHub:

 * https://github.com/Pyomo

Get help at

 * StackOverflow: https://stackoverflow.com/questions/tagged/pyomo
 * Pyomo Forum:   https://groups.google.com/group/pyomo-forum/