gh-145452: Initialize PyLazyImport_Type during interpreter startup (#145453)

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: johnslavik

Lib/test/test_lazy_import/__init__.py

@@ -12,6 +12,7 @@
 import os
 
 from test import support
+from test.support.script_helper import assert_python_ok
 
 try:
     import _testcapi
@@ -219,6 +220,16 @@ def test_lazy_import_type_cant_construct(self):
         """LazyImportType should not be directly constructible."""
         self.assertRaises(TypeError, types.LazyImportType, {}, "module")
 
+    @support.requires_subprocess()
+    def test_lazy_import_type_attributes_accessible(self):
+        """Check that static PyLazyImport_Type is initialized at startup."""
+        code = textwrap.dedent("""
+            lazy import json
+            print(globals()["json"].resolve)
+        """)
+        proc = assert_python_ok("-c", code)
+        self.assertIn(b"<built-in method resolve of lazy_import object at", proc.out)
+
 
 class SyntaxRestrictionTests(unittest.TestCase):
     """Tests for syntax restrictions on lazy imports."""

Objects/object.c

@@ -17,6 +17,7 @@
 #include "pycore_instruction_sequence.h" // _PyInstructionSequence_Type
 #include "pycore_interpframe.h"   // _PyFrame_Stackbase()
 #include "pycore_interpolation.h" // _PyInterpolation_Type
+#include "pycore_lazyimportobject.h" // PyLazyImport_Type
 #include "pycore_list.h"          // _PyList_DebugMallocStats()
 #include "pycore_long.h"          // _PyLong_GetZero()
 #include "pycore_memoryobject.h"  // _PyManagedBuffer_Type
@@ -2540,6 +2541,7 @@ static PyTypeObject* static_types[] = {
     &PyGen_Type,
     &PyGetSetDescr_Type,
     &PyInstanceMethod_Type,
+    &PyLazyImport_Type,
     &PyListIter_Type,
     &PyListRevIter_Type,
     &PyList_Type,