Python 3.12 compatibility (#5157)

CHANGES.rst

@@ -3,6 +3,9 @@ Version 2.3.3
 
 Unreleased
 
+-   Python 3.12 compatibility.
+-   Update Werkzeug requirement to >=2.3.5.
+
 
 Version 2.3.2
 -------------

pyproject.toml

@@ -19,7 +19,7 @@ classifiers = [
 ]
 requires-python = ">=3.8"
 dependencies = [
-    "Werkzeug>=2.3.3",
+    "Werkzeug>=2.3.5",
     "Jinja2>=3.1.2",
     "itsdangerous>=2.1.2",
     "click>=8.1.3",

requirements/tests-pallets-min.in

@@ -1,4 +1,4 @@
-Werkzeug==2.3.3
+Werkzeug==2.3.5
 Jinja2==3.1.2
 MarkupSafe==2.1.1
 itsdangerous==2.1.2

requirements/tests-pallets-min.txt

@@ -1,4 +1,4 @@
-# SHA1:0b58503b99aabc227b7f39357216d676d9987a12
+# SHA1:c4bfd085a9d4e81c583daf70671803d5e388c656
 #
 # This file is autogenerated by pip-compile-multi
 # To update, run:
@@ -18,5 +18,5 @@ markupsafe==2.1.1
     #   -r requirements/tests-pallets-min.in
     #   jinja2
     #   werkzeug
-werkzeug==2.3.3
+werkzeug==2.3.5
     # via -r requirements/tests-pallets-min.in

src/flask/helpers.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+import importlib.util
 import os
-import pkgutil
 import socket
 import sys
 import typing as t
@@ -575,7 +575,8 @@ def get_root_path(import_name: str) -> str:
         return os.path.dirname(os.path.abspath(mod.__file__))
 
     # Next attempt: check the loader.
-    loader = pkgutil.get_loader(import_name)
+    spec = importlib.util.find_spec(import_name)
+    loader = spec.loader if spec is not None else None
 
     # Loader does not exist or we're referring to an unloaded main
     # module or a main module without path (interactive sessions), go

src/flask/scaffold.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 import importlib.util
 import os
 import pathlib
-import pkgutil
 import sys
 import typing as t
 from collections import defaultdict
@@ -856,7 +855,8 @@ def _find_package_path(import_name):
             return os.path.dirname(root_spec.origin)
 
     # we were unable to find the `package_path` using PEP 451 loaders
-    loader = pkgutil.get_loader(root_mod_name)
+    spec = importlib.util.find_spec(root_mod_name)
+    loader = spec.loader if spec is not None else None
 
     if loader is None or root_mod_name == "__main__":
         # import name is not found, or interactive/main module