Use Never for Python 3.11 and newer

sebastinas · sebastinas · commit a12d339e1a0b · 2024-06-02T13:04:12.000+02:00
diff --git a/bpython/_typing_compat.py b/bpython/_typing_compat.py
@@ -0,0 +1,28 @@
+# The MIT License
+#
+# Copyright (c) 2024 Sebastian Ramacher
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+try:
+    # introduced in Python 3.11
+    from typing import Never
+except ImportError:
+    from typing import NoReturn as Never  # type: ignore
+
diff --git a/bpython/args.py b/bpython/args.py
@@ -36,12 +36,13 @@
 import os
 import sys
 from pathlib import Path
-from typing import Tuple, List, Optional, NoReturn, Callable
+from typing import Tuple, List, Optional, Callable
 from types import ModuleType
 
 from . import __version__, __copyright__
 from .config import default_config_path, Config
 from .translations import _
+from ._typing_compat import Never
 
 logger = logging.getLogger(__name__)
 
@@ -51,7 +52,7 @@ class ArgumentParserFailed(ValueError):
 
 
 class RaisingArgumentParser(argparse.ArgumentParser):
-    def error(self, msg: str) -> NoReturn:
+    def error(self, msg: str) -> Never:
         raise ArgumentParserFailed()
 
 
