def get_attribute_value(self, name, index):
        """
        Returns the value associated with the given value index
        of the attribute with the given name.
        
        This is only applicable for nominal and string types.
        """
        if index == MISSING:
            return
        elif self.attribute_types[name] in NUMERIC_TYPES:
            at = self.attribute_types[name]
            if at == TYPE_INTEGER:
                return int(index)
            return Decimal(str(index))
        else:
            assert self.attribute_types[name] == TYPE_NOMINAL
            cls_index, cls_value = index.split(':')
            #return self.attribute_data[name][index-1]
            if cls_value != MISSING:
                assert cls_value in self.attribute_data[name], \
                    'Predicted value "%s" but only values %s are allowed.' \
                        % (cls_value, ', '.join(self.attribute_data[name]))
            return cls_value
def get_attribute_value ( self , name , index ) : if index == MISSING : return elif self . attribute_types [ name ] in NUMERIC_TYPES : at = self . attribute_types [ name ] if at == TYPE_INTEGER : return int ( index ) return Decimal ( str ( index ) ) else : assert self . attribute_types [ name ] == TYPE_NOMINAL cls_index , cls_value = index . split ( ':' ) if cls_value != MISSING : assert cls_value in self . attribute_data [ name ] , 'Predicted value "%s" but only values %s are allowed.' % ( cls_value , ', ' . join ( self . attribute_data [ name ] ) ) return cls_value
Returns the value associated with the given value index
        of the attribute with the given name.
        
        This is only applicable for nominal and string types.