def construct_mapping(self, node, deep=False):
        if isinstance(node, yaml.MappingNode):
            self.flatten_mapping(node)
        else:
            raise ConstructorError(None,
                                   None,
                                   'expected a mapping node, but found %s' % node.id,
                                   node.start_mark)

        mapping = OrderedDict()

        for key_node, value_node in node.value:
            key = self.construct_object(key_node, deep=deep)
            try:
                hash(key)
            except TypeError as exc:
                raise ConstructorError('while constructing a mapping',
                                       node.start_mark,
                                       exc % 'found unacceptable key (%s)',
                                       key_node.start_mark)
            value = self.construct_object(value_node, deep=deep)
            mapping[key] = value

        return mapping
dataset/ETHPy150Open SublimeText/PackageDev/ordereddict_yaml/__init__.py/BaseOrderedDictLoader.construct_mapping/swapped operands of `%`