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COBE stands for Code of Business Ethics. Cobe is a conversation simulator, originally a database backed port of MegaHAL but a bit more now.

According to the Nobel Prize committee, "the COBE project can also be regarded as the starting point for cosmology as a precision science."

There are a few relevant posts here:

• http://teichman.org/blog/2011/09/cobe-2.0.html
• http://teichman.org/blog/2011/05/singularity.html
• http://teichman.org/blog/2011/02/cobe.html

You can read its release history here.

Cobe has been inspired by the success of Hailo

Our goals are similar to Hailo: an on-disk data store for lower memory usage, better support for Unicode, and general stability.

You can read about the original MegaHAL here.

In short, it uses Markov modeling to generate text responses after learning from input text.

Cobe creates a directed graph of word n-grams (default n=3) from the text it learns. When generating a response, it performs random walks on this graph to create as many candidate replies as it can in half a second.

As the candidate responses are created, they're run through a scoring algorithm that identifies which is the best of the group. After the half second is over, the best candidate is returned as the response.

Cobe installs a command line tool (called cobe) for interacting with a brain database, though it is also intended to be used as a Python api. See the documentation in the cobe.brain module for details.

To install from a tarball:

$ python setup.py install

Or from the Python Package Index:

$ easy_install pip
# pip install cobe

Usage:

$ cobe init
$ cobe learn <text file>
$ cobe console