Use typing.TYPE_CHECKING for typehints

1 files changed, 2 insertions, 2 deletions

diff --git a/sphinx/ext/graphviz.py b/sphinx/ext/graphviz.py
index 2986bf9c1..da3e55b60 100644
--- a/sphinx/ext/graphviz.py
+++ b/sphinx/ext/graphviz.py
@@ -16,6 +16,7 @@ import re
 from hashlib import sha1
 from os import path
 from subprocess import Popen, PIPE
+from typing import TYPE_CHECKING
 
 from docutils import nodes
 from docutils.parsers.rst import Directive, directives
@@ -29,8 +30,7 @@ from sphinx.util import logging
 from sphinx.util.i18n import search_image_for_language
 from sphinx.util.osutil import ensuredir, ENOENT, EPIPE, EINVAL
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from typing import Any, Dict, List, Tuple  # NOQA
     from sphinx.application import Sphinx  # NOQA