Use typing.TYPE_CHECKING for typehints

1 files changed, 3 insertions, 2 deletions

diff --git a/sphinx/util/parallel.py b/sphinx/util/parallel.py
index fe2577308..be83a40ac 100644
--- a/sphinx/util/parallel.py
+++ b/sphinx/util/parallel.py
@@ -8,11 +8,13 @@
     :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
     :license: BSD, see LICENSE for details.
 """
+from __future__ import absolute_import
 
 import os
 import time
 import traceback
 from math import sqrt
+from typing import TYPE_CHECKING
 
 from six import iteritems
 
@@ -24,8 +26,7 @@ except ImportError:
 from sphinx.errors import SphinxParallelError
 from sphinx.util import logging
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from typing import Any, Callable, Dict, List, Sequence  # NOQA
 
 logger = logging.getLogger(__name__)