def _get_id_for_path(self, path):

        # FIXME: Please, spare a couple of minutes and make those codes cleaner;
        if not path in self._paths:
            path = path.strip('/')
            # set root tree
            tree = self.repository._repo[self._tree_id]
            if path == '':
                self._paths[''] = tree.id
                return tree.id
            splitted = path.split('/')
            dirs, name = splitted[:-1], splitted[-1]
            curdir = ''

            # initially extract things from root dir
            for item, stat, id in tree.iteritems():
                if curdir:
                    name = '/'.join((curdir, item))
                else:
                    name = item
                self._paths[name] = id
                self._stat_modes[name] = stat

            for dir in dirs:
                if curdir:
                    curdir = '/'.join((curdir, dir))
                else:
                    curdir = dir
                dir_id = None
                for item, stat, id in tree.iteritems():
                    if dir == item:
                        dir_id = id
                if dir_id:
                    # Update tree
                    tree = self.repository._repo[dir_id]
                    if not isinstance(tree, objects.Tree):
                        raise ChangesetError(curdir % '%s is not a directory')
                else:
                    raise ChangesetError('%s have not been found' % curdir)

                # cache all items from the given traversed tree
                for item, stat, id in tree.iteritems():
                    if curdir:
                        name = '/'.join((curdir, item))
                    else:
                        name = item
                    self._paths[name] = id
                    self._stat_modes[name] = stat
            if not path in self._paths:
                raise NodeDoesNotExistError("There is no file nor directory "
                    "at the given path '%s' at revision %s"
                    % (path, self.short_id))
        return self._paths[path]
dataset/ETHPy150Open codeinn/vcs/vcs/backends/git/changeset.py/GitChangeset._get_id_for_path/swapped operands of `%`