Playground is a Gentic Programming framework implemented in Python. Currently features:

• Genetic Programming in Trees
• Tree Genetic Operators:
  • Selection
    • Roulette wheel selection
    • Tournament selection
  • Crossover
    • One point crossover
  • Mutation
    • Point mutation
    • Hoist mutation
    • Subtree mutation
    • Shrink mutation
    • Expand mutation
• Multicore Evaluation
• Multinode Evaluation (experimental)
• JSON config files
• Ability to record evolution process to database (PostgreSQL or JSON flat file)

• Python (version 2.7 +)
• sympy (version 0.7.3 +)

Currently the best way is to clone the repo and install the dependencies:

git clone git@github.com:chutsu/playground.git
pip install -r requirements.txt  # installs dependencies for playground

To see playground in action, checkout the examples folder, at the moment the best example is the symbolic regression example. (what is symbolic regression?):

cd examples/symbolic_regression
python symbolic_regression.py
# alternatively you can run the example with PyPy, it might be faster :)
pypy symbolic_regression.py

The example uses data in examples/symbolic_regression/sine.dat to find the answer (an equation), this is also an example of data-driven search.

More examples to follow, it can solve alot of other problems, such as evolving digital circuits, neural nets, etc ... :)

If you want evolution recording (such as fitness/evaluation score vs time):

• PostgreSQL (version 9.3 +)
• Psycopg2 (version 2.5 +)

LGPL License Copyright (C) <2013> Chris Choi

This program is free software: you can redistribute it and/or modify it under the terms of the Lesser GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.