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gh-119180: No longer set __annotations__ in __main__ #124634

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Merged
merged 2 commits into from
Sep 27, 2024
Merged

gh-119180: No longer set __annotations__ in __main__ #124634

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c03e9f7
gh-119180: No longer set `__annotations__` in `__main__`
JelleZijlstra Sep 26, 2024
2ae7cd7
fix tests
JelleZijlstra Sep 26, 2024
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1 change: 0 additions & 1 deletion Lib/test/test__interpreters.py
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Expand Up @@ -849,7 +849,6 @@ def test_execution_namespace_is_main(self):
ns.pop('__loader__')
self.assertEqual(ns, {
'__name__': '__main__',
'__annotations__': {},
'__doc__': None,
'__package__': None,
'__spec__': None,
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2 changes: 1 addition & 1 deletion Lib/test/test_pyrepl/test_pyrepl.py
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Expand Up @@ -1080,7 +1080,7 @@ def setUp(self):

@force_not_colorized
def test_exposed_globals_in_repl(self):
pre = "['__annotations__', '__builtins__'"
pre = "['__builtins__'"
post = "'__loader__', '__name__', '__package__', '__spec__']"
output, exit_code = self.run_repl(["sorted(dir())", "exit()"])
if "can't use pyrepl" in output:
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core_and_Builtins/2024-09-26-13-25-01.gh-issue-119180.k_JCX0.rst
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@@ -0,0 +1,2 @@
The ``__main__`` module no longer always contains an ``__annotations__``
dictionary in its global namespace.
8 changes: 1 addition & 7 deletions Python/pylifecycle.c
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Expand Up @@ -2503,18 +2503,12 @@ finalize_subinterpreters(void)
static PyStatus
add_main_module(PyInterpreterState *interp)
{
PyObject *m, *d, *ann_dict;
PyObject *m, *d;
m = PyImport_AddModuleObject(&_Py_ID(__main__));
if (m == NULL)
return _PyStatus_ERR("can't create __main__ module");

d = PyModule_GetDict(m);
ann_dict = PyDict_New();
if ((ann_dict == NULL) ||
(PyDict_SetItemString(d, "__annotations__", ann_dict) < 0)) {
return _PyStatus_ERR("Failed to initialize __main__.__annotations__");
}
Py_DECREF(ann_dict);

int has_builtins = PyDict_ContainsString(d, "__builtins__");
if (has_builtins < 0) {
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