python · pablogsal · Mar 11, 2026 · Mar 11, 2026
@@ -3,6 +3,7 @@

 #include "pycore_pyerrors.h"      // _PyErr_ProgramDecodedTextObject()
 #include "pycore_runtime.h"       // _Py_ID()
+#include "pycore_tuple.h"         // _PyTuple_FromPair
 #include "lexer/state.h"
 #include "lexer/lexer.h"
 #include "pegen.h"
@@ -41,7 +42,7 @@ _PyPegen_raise_tokenizer_init_error(PyObject *filename)
        goto error;
    }

-    tuple = PyTuple_Pack(2, errstr, tmp);
+    tuple = _PyTuple_FromPair(errstr, tmp);
    Py_DECREF(tmp);
    if (!tuple) {
        goto error;
@@ -393,7 +394,7 @@ _PyPegen_raise_error_known_location(Parser *p, PyObject *errtype,
    if (!tmp) {
        goto error;
    }
-    value = PyTuple_Pack(2, errstr, tmp);
+    value = _PyTuple_FromPair(errstr, tmp);
    Py_DECREF(tmp);
    if (!value) {
        goto error;

diff --git a/Python/Python-tokenize.c b/Python/Python-tokenize.c
@@ -1,6 +1,7 @@
 #include "Python.h"
 #include "errcode.h"
 #include "internal/pycore_critical_section.h"   // Py_BEGIN_CRITICAL_SECTION
+#include "internal/pycore_tuple.h"              // _PyTuple_FromPair
 #include "../Parser/lexer/state.h"
 #include "../Parser/lexer/lexer.h"
 #include "../Parser/tokenizer/tokenizer.h"
@@ -164,7 +165,7 @@ _tokenizer_error(tokenizeriterobject *it)
        goto exit;
    }

-    value = PyTuple_Pack(2, errstr, tmp);
+    value = _PyTuple_FromPair(errstr, tmp);
    if (!value) {
        result = -1;
        goto exit;

diff --git a/Python/_warnings.c b/Python/_warnings.c
@@ -7,6 +7,7 @@
 #include "pycore_pylifecycle.h"   // _Py_IsInterpreterFinalizing()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_traceback.h"     // _Py_DisplaySourceLine()
+#include "pycore_tuple.h"         // _PyTuple_FromPair
 #include "pycore_unicodeobject.h" // _PyUnicode_EqualToASCIIString()

 #include <stdbool.h>
@@ -634,7 +635,7 @@ update_registry(PyInterpreterState *interp, PyObject *registry, PyObject *text,
    if (add_zero)
        altkey = PyTuple_Pack(3, text, category, _PyLong_GetZero());
    else
-        altkey = PyTuple_Pack(2, text, category);
+        altkey = _PyTuple_FromPair(text, category);

    rc = already_warned(interp, registry, altkey, 1);
    Py_XDECREF(altkey);

@@ -3341,7 +3341,7 @@ zip_reduce(PyObject *self, PyObject *Py_UNUSED(ignored))
    if (lz->strict) {
        return PyTuple_Pack(3, Py_TYPE(lz), lz->ittuple, Py_True);
    }
-    return PyTuple_Pack(2, Py_TYPE(lz), lz->ittuple);
+    return _PyTuple_FromPair((PyObject *)Py_TYPE(lz), lz->ittuple);
 }

 static PyObject *

@@ -23,6 +23,7 @@
 #include "pycore_runtime.h"       // _Py_ID()
 #include "pycore_setobject.h"     // _PySet_NextEntry()
 #include "pycore_stats.h"
+#include "pycore_tuple.h"         // _PyTuple_FromPair
 #include "pycore_unicodeobject.h" // _PyUnicode_EqualToASCIIString()

 #include "cpython/code.h"
@@ -1697,7 +1698,7 @@ _PyCompile_CodeGen(PyObject *ast, PyObject *filename, PyCompilerFlags *pflags,
        return NULL;
    }
    /* Allocate a copy of the instruction sequence on the heap */
-    res = PyTuple_Pack(2, _PyCompile_InstrSequence(c), metadata);
+    res = _PyTuple_FromPair((PyObject *)_PyCompile_InstrSequence(c), metadata);

 finally:
    Py_XDECREF(metadata);

@@ -4,6 +4,7 @@
 #include "pycore_initconfig.h"    // _PyStatus_OK()
 #include "pycore_long.h"          // _PyLong_Format()
 #include "pycore_object.h"        // _PyObject_GC_TRACK()
+#include "pycore_tuple.h"         // _PyTuple_FromPair

 #include <stddef.h>               // offsetof()

@@ -2542,7 +2543,7 @@ PyTypeObject _PyHamtItems_Type = {
 static PyObject *
 hamt_iter_yield_items(PyObject *key, PyObject *val)
 {
-    return PyTuple_Pack(2, key, val);
+    return _PyTuple_FromPair(key, val);
 }

 PyObject *

diff --git a/Python/marshal.c b/Python/marshal.c
@@ -14,6 +14,7 @@
 #include "pycore_object.h"           // _PyObject_IsUniquelyReferenced
 #include "pycore_pystate.h"          // _PyInterpreterState_GET()
 #include "pycore_setobject.h"        // _PySet_NextEntryRef()
+#include "pycore_tuple.h"            // _PyTuple_FromPairSteal
 #include "pycore_unicodeobject.h"    // _PyUnicode_InternImmortal()

 #include "marshal.h"                 // Py_MARSHAL_VERSION
@@ -629,9 +630,7 @@ w_complex_object(PyObject *v, char flag, WFILE *p)
                Py_DECREF(value);
                break;
            }
-            PyObject *pair = PyTuple_Pack(2, dump, value);
-            Py_DECREF(dump);
-            Py_DECREF(value);
+            PyObject *pair = _PyTuple_FromPairSteal(dump, value);
            if (pair == NULL) {
                p->error = WFERR_NOMEMORY;
                break;

@@ -30,6 +30,7 @@
 #include "pycore_stats.h"         // _PyStats_InterpInit()
 #include "pycore_sysmodule.h"     // _PySys_ClearAttrString()
 #include "pycore_traceback.h"     // _Py_DumpTracebackThreads()
+#include "pycore_tuple.h"         // _PyTuple_FromPair
 #include "pycore_typeobject.h"    // _PyTypes_InitTypes()
 #include "pycore_typevarobject.h" // _Py_clear_generic_types()
 #include "pycore_unicodeobject.h" // _PyUnicode_InitTypes()
@@ -1613,7 +1614,7 @@ finalize_remove_modules(PyObject *modules, int verbose)
        if (weaklist != NULL) { \
            PyObject *wr = PyWeakref_NewRef(mod, NULL); \
            if (wr) { \
-                PyObject *tup = PyTuple_Pack(2, name, wr); \
+                PyObject *tup = _PyTuple_FromPair(name, wr); \
                if (!tup || PyList_Append(weaklist, tup) < 0) { \
                    PyErr_FormatUnraisable("Exception ignored while removing modules"); \
                } \