Hello @ all,
i'm a newbie in python and have written a module for computations in a bayesian network.
The module can be found at: http://www.informatik.uni-freiburg.de/~steffenh/bayes.py
In this module i define four classes.
- cdp (conditional probability [distribution]) consisting of cdp_entry objects
- graph ( a graph class )
- bayesNet ( the bayesian network, a subclass of graph )
My problem is the following:
I have a global method test() in the module, where i want to test my implementation of the em-learning algorithm, for learning parameters in a bayesian network.
When I import this module in the python environment and then run the test method, everything seems to be ok, and the calculations that are hardcoded in this method seems to be correct.
In the test method i instantiate a bayesNet object for the further calculations.
The results that are computed and printed are probability distributions in the bayesian network, but this is not important for the problem.
The problem comes when i want to run the test method again for a second time. What happens is that the "same" expressions/computations listed
in the test method leads to another results, even if the commands are the same.
I can only imagine that this comes out of some objects that are not
destroyed and influence the new bayesNet object that is created there.
If there is a problem with the instantiations, it is in the test method which is at the end of the file bayes.py (see above)
Does someone see the problem there???
If you need some more information about what happens in the module please write me a mail, but i hope the comments are enough to understand the problem.
If you think this is too much off-topic we can discuss the problem out of the newsgroup.
thanks in advance, Felix Steffenhagen -- http://mail.python.org/mailman/listinfo/python-list
