Hello TYPE_CHECKING!

5 files changed, 10 insertions, 15 deletions

diff --git a/sphinx/writers/html.py b/sphinx/writers/html.py
index e74c0334f..508e28c22 100644
--- a/sphinx/writers/html.py
+++ b/sphinx/writers/html.py
@@ -13,7 +13,7 @@ import os
 import posixpath
 import warnings
 from typing import Any, Iterable, Tuple
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes
 from docutils.nodes import Element, Node, Text
@@ -27,8 +27,7 @@ from sphinx.util import logging
 from sphinx.util.docutils import SphinxTranslator
 from sphinx.util.images import get_image_size
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.builders.html import StandaloneHTMLBuilder
 
 
diff --git a/sphinx/writers/html5.py b/sphinx/writers/html5.py
index bb8fb66a7..164ec3659 100644
--- a/sphinx/writers/html5.py
+++ b/sphinx/writers/html5.py
@@ -12,7 +12,7 @@ import os
 import posixpath
 import warnings
 from typing import Any, Iterable, Tuple
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes
 from docutils.nodes import Element, Node, Text
@@ -26,8 +26,7 @@ from sphinx.util import logging
 from sphinx.util.docutils import SphinxTranslator
 from sphinx.util.images import get_image_size
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.builders.html import StandaloneHTMLBuilder
 
 
diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 9390ba5de..e97271a18 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -16,7 +16,7 @@ import warnings
 from collections import defaultdict
 from os import path
 from typing import Any, Dict, Iterable, Iterator, List, Tuple, Set, Union
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes, writers
 from docutils.nodes import Element, Node, Text
@@ -42,8 +42,7 @@ except ImportError:
     # In Debain/Ubuntu, roman package is provided as roman, not as docutils.utils.roman
     from roman import toRoman  # type: ignore
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.builders.latex import LaTeXBuilder
     from sphinx.builders.latex.theming import Theme
 
diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index 9c30244e9..bd30a73ee 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -12,7 +12,7 @@ import re
 import textwrap
 from os import path
 from typing import Any, Dict, Iterable, Iterator, List, Pattern, Set, Tuple, Union
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes, writers
 from docutils.nodes import Element, Node, Text
@@ -27,8 +27,7 @@ from sphinx.util.docutils import SphinxTranslator
 from sphinx.util.i18n import format_date
 from sphinx.writers.latex import collected_footnote
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.builders.texinfo import TexinfoBuilder
 
 
diff --git a/sphinx/writers/text.py b/sphinx/writers/text.py
index b2ccd7b89..7ac5f52c6 100644
--- a/sphinx/writers/text.py
+++ b/sphinx/writers/text.py
@@ -13,7 +13,7 @@ import re
 import textwrap
 from itertools import groupby, chain
 from typing import Any, Dict, Generator, List, Iterable, Optional, Set, Tuple, Union
-from typing import cast
+from typing import TYPE_CHECKING, cast
 
 from docutils import nodes, writers
 from docutils.nodes import Element, Node, Text
@@ -23,8 +23,7 @@ from sphinx import addnodes
 from sphinx.locale import admonitionlabels, _
 from sphinx.util.docutils import SphinxTranslator
 
-if False:
-    # For type annotation
+if TYPE_CHECKING:
     from sphinx.builders.text import TextBuilder