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-rw-r--r--sphinx/util/inventory.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/sphinx/util/inventory.py b/sphinx/util/inventory.py
index ed4e55bc2..4ed12e2da 100644
--- a/sphinx/util/inventory.py
+++ b/sphinx/util/inventory.py
@@ -8,16 +8,18 @@
:copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
+from __future__ import absolute_import
+
import os
import re
import zlib
+from typing import TYPE_CHECKING
from six import PY3
from sphinx.util import logging
-if False:
- # For type annotation
+if TYPE_CHECKING:
from typing import Callable, Dict, IO, Iterator, Tuple # NOQA
from sphinx.builders import Builder # NOQA
from sphinx.environment import BuildEnvironment # NOQA