expose co_qualname to Python

Author: P403n1x87

Include/cpython/code.h

@@ -75,8 +75,7 @@ struct PyCodeObject {
     PyObject *co_localspluskinds; /* Bytes mapping to local kinds (one byte per variable) */
     PyObject *co_filename;      /* unicode (where it was loaded from) */
     PyObject *co_name;          /* unicode (name, for reference) */
-    PyObject *co_qualname;      /* unicode (qualname, only for code objects created
-                                   by the compiler, otherwise NULL) */
+    PyObject *co_qualname;      /* unicode (qualname, for reference) */
     PyObject *co_linetable;     /* string (encoding addr<->lineno mapping) See
                                    Objects/lnotab_notes.txt for details. */
 
@@ -151,12 +150,12 @@ PyAPI_DATA(PyTypeObject) PyCode_Type;
 PyAPI_FUNC(PyCodeObject *) PyCode_New(
         int, int, int, int, int, PyObject *, PyObject *,
         PyObject *, PyObject *, PyObject *, PyObject *,
-        PyObject *, PyObject *, int, PyObject *, PyObject *);
+        PyObject *, PyObject *, PyObject *, int, PyObject *, PyObject *);
 
 PyAPI_FUNC(PyCodeObject *) PyCode_NewWithPosOnlyArgs(
         int, int, int, int, int, int, PyObject *, PyObject *,
         PyObject *, PyObject *, PyObject *, PyObject *,
-        PyObject *, PyObject *, int, PyObject *, PyObject *);
+        PyObject *, PyObject *, PyObject *, int, PyObject *, PyObject *);
         /* same as struct above */
 
 /* Creates a new empty code object with the specified source location. */

Lib/ctypes/test/test_values.py

@@ -80,9 +80,9 @@ class struct_frozen(Structure):
                 continue
             items.append((entry.name.decode("ascii"), entry.size))
 
-        expected = [("__hello__", 133),
-                    ("__phello__", -133),
-                    ("__phello__.spam", 133),
+        expected = [("__hello__", 138),
+                    ("__phello__", -138),
+                    ("__phello__.spam", 138),
                     ]
         self.assertEqual(items, expected, "PyImport_FrozenModules example "
             "in Doc/library/ctypes.rst may be out of date")

Lib/test/test_code.py

@@ -221,12 +221,19 @@ def func(): pass
                         co.co_varnames,
                         co.co_filename,
                         co.co_name,
+                        co.co_qualname,
                         co.co_firstlineno,
                         co.co_lnotab,
                         co.co_exceptiontable,
                         co.co_freevars,
                         co.co_cellvars)
 
+    def test_qualname(self):
+        self.assertEqual(
+            CodeTest.test_qualname.__code__.co_qualname,
+            CodeTest.test_qualname.__qualname__
+        )
+
     def test_replace(self):
         def func():
             x = 1
@@ -291,6 +298,7 @@ def func():
                          co.co_varnames,
                          co.co_filename,
                          co.co_name,
+                         co.co_qualname,
                          co.co_firstlineno,
                          co.co_lnotab,
                          co.co_exceptiontable,

Misc/NEWS.d/next/C API/2021-06-28-23-44-47.bpo-44530.qij7YC.rst

@@ -1,5 +1,4 @@
 Added the co_qualname to the PyCodeObject structure to propagate the
-qualified name from the compiler to code objects. Code objects that are
-created manually have this new field set to NULL.
+qualified name from the compiler to code objects.
 
 Patch by Gabriele N. Tornetta