def __init__(self, vars=None, factors=None):
"""vars is a list of variables
factors is a list of factors (instances of Prob and Utility)
"""
Graphical_model.__init__(self, vars, factors)
def query(self, var):
"""returns the posterior probability of current variable var"""
return VE(Graphical_model(self.dbn.vars1, self.current_factors)).query(
var, self.current_obs)