[5.2.x] Fixed #36903 -- Fixed further NameErrors when inspecting functions with deferred annotations.

Provide a wrapper for safe introspection of user functions on Python 3.14+.

Follow-up to 601914722956cc41f1f2c53972d669ddee6ffc04.
Backport of 56ed37e17e5b1a509aa68a0c797dcff34fcc1366 from main.

1 files changed, 2 insertions, 2 deletions

diff --git a/django/db/models/expressions.py b/django/db/models/expressions.py
index 4284c84375..f830df82c2 100644
--- a/django/db/models/expressions.py
+++ b/django/db/models/expressions.py
@@ -1,7 +1,6 @@
 import copy
 import datetime
 import functools
-import inspect
 from collections import defaultdict
 from decimal import Decimal
 from enum import Enum
@@ -17,6 +16,7 @@ from django.db.models.query_utils import Q
 from django.utils.deconstruct import deconstructible
 from django.utils.functional import cached_property, classproperty
 from django.utils.hashable import make_hashable
+from django.utils.inspect import signature
 
 
 class SQLiteNumericMixin:
@@ -521,7 +521,7 @@ class Expression(BaseExpression, Combinable):
     @classproperty
     @functools.lru_cache(maxsize=128)
     def _constructor_signature(cls):
-        return inspect.signature(cls.__init__)
+        return signature(cls.__init__)
 
     @classmethod
     def _identity(cls, value):