def copy(self):
        """
        Copies the BeliefState by recursively deep-copying all of
        its parts.  Domains are not copied, as they do not change
        during the interpretation or generation.
        """
        copied = BeliefState(self.__dict__['referential_domain']) 
        for key in ['environment_variables', 'deferred_effects', 'pos', 'p']:
            copied.__dict__[key] = copy.deepcopy(self.__dict__[key])
        return copied
def copy ( self ) : copied = BeliefState ( self . __dict__ [ 'referential_domain' ] ) for key in [ 'environment_variables' , 'deferred_effects' , 'pos' , 'p' ] : copied . __dict__ [ key ] = copy . deepcopy ( self . __dict__ [ key ] ) return copied
Copies the BeliefState by recursively deep-copying all of
        its parts.  Domains are not copied, as they do not change
        during the interpretation or generation.