sys.exception

Author: youknowone

Lib/test/test_sys.py

@@ -75,8 +75,6 @@ class ActiveExceptionTests(unittest.TestCase):
     def test_exc_info_no_exception(self):
         self.assertEqual(sys.exc_info(), (None, None, None))
 
-    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
-    @unittest.expectedFailure
     def test_sys_exception_no_exception(self):
         self.assertEqual(sys.exception(), None)
 
@@ -110,8 +108,6 @@ def f():
         self.assertIs(exc_info[1], e)
         self.assertIs(exc_info[2], e.__traceback__)
 
-    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
-    @unittest.expectedFailure
     def test_sys_exception_with_exception_instance(self):
         def f():
             raise ValueError(42)
@@ -125,8 +121,6 @@ def f():
         self.assertIsInstance(e, ValueError)
         self.assertIs(exc, e)
 
-    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
-    @unittest.expectedFailure
     def test_sys_exception_with_exception_type(self):
         def f():
             raise ValueError

vm/src/stdlib/sys.rs

@@ -5,7 +5,9 @@ pub(crate) use sys::{UnraisableHookArgs, __module_def, DOC, MAXSIZE, MULTIARCH};
 #[pymodule]
 mod sys {
     use crate::{
-        builtins::{PyDictRef, PyNamespace, PyStr, PyStrRef, PyTupleRef, PyTypeRef},
+        builtins::{
+            PyBaseExceptionRef, PyDictRef, PyNamespace, PyStr, PyStrRef, PyTupleRef, PyTypeRef,
+        },
         common::{
             ascii,
             hash::{PyHash, PyUHash},
@@ -309,6 +311,11 @@ mod sys {
         Err(vm.new_exception(vm.ctx.exceptions.system_exit.to_owned(), vec![code]))
     }
 
+    #[pyfunction]
+    fn exception(vm: &VirtualMachine) -> Option<PyBaseExceptionRef> {
+        vm.topmost_exception()
+    }
+
     #[pyfunction(name = "__displayhook__")]
     #[pyfunction]
     fn displayhook(obj: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {