From f7db50387767e3052ec6fc604df8481f483abe74 Mon Sep 17 00:00:00 2001
From: Hsiaoming Yang <me@lepture.com>
Date: Thu, 24 Oct 2024 18:10:52 +0900
Subject: [PATCH] fix: make typing-extension optional dependency

---
 pyproject.toml                | 3 +--
 src/mistune/__init__.py       | 9 +++++----
 src/mistune/core.py           | 2 +-
 src/mistune/list_parser.py    | 2 --
 src/mistune/renderers/html.py | 5 +----
 5 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 5a8247a..5e0883c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "mistune"
 description = "A sane and fast Markdown parser with useful plugins and renderers"
 authors = [{name = "Hsiaoming Yang", email="me@lepture.com"}]
 dependencies = [
-  "typing-extensions",
+  "typing-extensions; python_version<'3.11'",
 ]
 license = {text = "BSD-3-Clause"}
 dynamic = ["version"]
@@ -18,7 +18,6 @@ classifiers = [
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
diff --git a/src/mistune/__init__.py b/src/mistune/__init__.py
index 9448eae..bf27c84 100644
--- a/src/mistune/__init__.py
+++ b/src/mistune/__init__.py
@@ -8,10 +8,11 @@
     Documentation: https://mistune.lepture.com/
 """
 
-from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
-
-from typing_extensions import Literal
-
+try:
+    import typing_extensions
+except ImportError:
+    pass
+from typing import Any, Dict, Iterable, List, Optional, Tuple, Union, Literal
 from .block_parser import BlockParser
 from .core import BaseRenderer, BlockState, InlineState
 from .inline_parser import InlineParser
diff --git a/src/mistune/core.py b/src/mistune/core.py
index 05a2d20..7c23cd1 100644
--- a/src/mistune/core.py
+++ b/src/mistune/core.py
@@ -14,9 +14,9 @@
     Type,
     TypeVar,
     Union,
+    Self,
     cast,
 )
-from typing_extensions import Self
 
 _LINE_END = re.compile(r'\n|$')
 
diff --git a/src/mistune/list_parser.py b/src/mistune/list_parser.py
index 4609992..7b9682e 100644
--- a/src/mistune/list_parser.py
+++ b/src/mistune/list_parser.py
@@ -2,8 +2,6 @@
 
 import re
 from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Optional, Tuple, Match
-
-
 from .util import expand_leading_tab, expand_tab, strip_end
 
 if TYPE_CHECKING:
diff --git a/src/mistune/renderers/html.py b/src/mistune/renderers/html.py
index f8e86d7..0d999a7 100644
--- a/src/mistune/renderers/html.py
+++ b/src/mistune/renderers/html.py
@@ -1,7 +1,4 @@
-from typing import Any, ClassVar, Dict, Optional, Tuple
-
-from typing_extensions import Literal
-
+from typing import Any, ClassVar, Dict, Optional, Tuple, Literal
 from ..core import BaseRenderer, BlockState
 from ..util import escape as escape_text
 from ..util import safe_entity, striptags