LazyImportType.resolve() does not replace the module global and can import twice

Bug report

Bug description:

Calling resolve() on a lazy import proxy forces the import and returns the resolved object, but it does not replace the original lazy object in the module globals. A later normal global access reifies the same lazy object again.

import builtins
import types

real_import = builtins.__import__
calls = []

lazy import target_module as target

def custom_import(name, globals=None, locals=None, fromlist=None, level=0):
    if name == "target_module":
        index = len(calls) + 1
        calls.append((index, name, globals.get("__name__"), fromlist))
        module = types.ModuleType(name)
        module.VALUE = f"value-{index}"
        return module
    return real_import(name, globals, locals, fromlist, level)

builtins.__import__ = custom_import
try:
    def resolve_from_dict():
        lazy_obj = globals()["target"]
        resolved = lazy_obj.resolve()
        print("resolved:", resolved.VALUE)
        print("global after resolve:", type(globals()["target"]).__name__)

    resolve_from_dict()

    print("direct:", target.VALUE)
    print("global after direct:", type(globals()["target"]).__name__)
    print("calls:", calls)
finally:
    builtins.__import__ = real_import

Expected: one import, with the module global replaced after resolve().

Actual on current main:

resolved: value-1
global after resolve: lazy_import
direct: value-2
global after direct: module
calls: [(1, 'target_module', '__main__', None), (2, 'target_module', '__main__', None)]

I confirmed this across tier1, tier2, and tier2 without uop optimization:
https://github.com/Kuhai9801/cpython/actions/runs/28243825007

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-152308
• gh-152524
• gh-157730

Commencez par le reproducer de l’issue et suivez LazyImportType.resolve(), en vous concentrant sur la manière dont l’objet lazy est stocké dans les variables globales du module. C’est terminé lorsque resolve() déclenche un import, remplace la variable globale du module et qu’un accès direct ultérieur renvoie le même module ; vérifiez-le avec les appels et la sortie indiqués.