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Lib/test/test_lazy_import
Misc/NEWS.d/next/Core_and_Builtins
Python
Original file line numberDiff line numberDiff line change@@ -1088,6 +1088,49 @@ def test_env_var_lazy_imports_none_disables_all_lazy(self):
10881088self.assertEqual(result.returncode, 0, f"stderr: {result.stderr}")
10891089self.assertIn("EAGER", result.stdout)
109010901091+deftest_cli_lazy_imports_none_disables_dunder_lazy_modules(self):
1092+"""-X lazy_imports=none should override __lazy_modules__."""
1093+code=textwrap.dedent("""
1094+ import sys
1095+ __lazy_modules__ = ["json"]
1096+ import json
1097+ if 'json' in sys.modules:
1098+ print("EAGER")
1099+ else:
1100+ print("LAZY")
1101+ """)
1102+result=subprocess.run(
1103+ [sys.executable, "-X", "lazy_imports=none", "-c", code],
1104+capture_output=True,
1105+text=True,
1106+ )
1107+self.assertEqual(result.returncode, 0, f"stderr: {result.stderr}")
1108+self.assertIn("EAGER", result.stdout)
1109+1110+deftest_env_var_lazy_imports_none_disables_dunder_lazy_modules(self):
1111+"""PYTHON_LAZY_IMPORTS=none should override __lazy_modules__."""
1112+code=textwrap.dedent("""
1113+ import sys
1114+ __lazy_modules__ = ["json"]
1115+ import json
1116+ if 'json' in sys.modules:
1117+ print("EAGER")
1118+ else:
1119+ print("LAZY")
1120+ """)
1121+importos
1122+1123+env=os.environ.copy()
1124+env["PYTHON_LAZY_IMPORTS"] ="none"
1125+result=subprocess.run(
1126+ [sys.executable, "-c", code],
1127+capture_output=True,
1128+text=True,
1129+env=env,
1130+ )
1131+self.assertEqual(result.returncode, 0, f"stderr: {result.stderr}")
1132+self.assertIn("EAGER", result.stdout)
1133+10911134deftest_cli_overrides_env_var(self):
10921135"""Command-line option should take precedence over environment variable."""
10931136# PEP 810: -X lazy_imports takes precedence over PYTHON_LAZY_IMPORTS
Original file line numberDiff line numberDiff line change@@ -0,0 +1,2 @@
1+Ensure ``-X lazy_imports=none``` and ``PYTHON_LAZY_IMPORTS=none``` override
2+``__lazy_modules__``. Patch by Hugo van Kemenade.
Original file line numberDiff line numberDiff line change@@ -3086,7 +3086,7 @@ _PyEval_LazyImportName(PyThreadState *tstate, PyObject *builtins,
30863086break;
30873087 }
308830883089-if (!lazy) {
3089+if (!lazy&&PyImport_GetLazyImportsMode() !=PyImport_LAZY_NONE) {
30903090// See if __lazy_modules__ forces this to be lazy.
30913091lazy=check_lazy_import_compatibility(tstate, globals, name, level);
30923092if (lazy<0) {