Pending removal in Python 3.18#

• The following private functions are deprecated and planned for removal in Python 3.18:

• "_PyBytes_Join()": use "PyBytes_Join()".

• "_PyDict_GetItemStringWithError()": use "PyDict_GetItemStringRef()".

• "_PyDict_Pop()": use "PyDict_Pop()".

• "_PyLong_Sign()": use "PyLong_GetSign()".

• "_PyLong_FromDigits()" and "_PyLong_New()": use "PyLongWriter_Create()".

• "_PyThreadState_UncheckedGet()": use "PyThreadState_GetUnchecked()".

• "_PyUnicode_AsString()": use "PyUnicode_AsUTF8()".

• "_PyUnicodeWriter_Init()": replace "_PyUnicodeWriter_Init(&writer)" with "writer = PyUnicodeWriter_Create(0)".

• "_PyUnicodeWriter_Finish()": replace "_PyUnicodeWriter_Finish(&writer)" with "PyUnicodeWriter_Finish(writer)".

• "_PyUnicodeWriter_Dealloc()": replace "_PyUnicodeWriter_Dealloc(&writer)" with "PyUnicodeWriter_Discard(writer)".

• "_PyUnicodeWriter_WriteChar()": replace "_PyUnicodeWriter_WriteChar(&writer, ch)" with "PyUnicodeWriter_WriteChar(writer, ch)".

• "_PyUnicodeWriter_WriteStr()": replace "_PyUnicodeWriter_WriteStr(&writer, str)" with "PyUnicodeWriter_WriteStr(writer, str)".

• "_PyUnicodeWriter_WriteSubstring()": replace "_PyUnicodeWriter_WriteSubstring(&writer, str, start, end)" with "PyUnicodeWriter_WriteSubstring(writer, str, start, end)".

• "_PyUnicodeWriter_WriteASCIIString()": replace "_PyUnicodeWriter_WriteASCIIString(&writer, str)" with "PyUnicodeWriter_WriteASCII(writer, str)".

• "_PyUnicodeWriter_WriteLatin1String()": replace "_PyUnicodeWriter_WriteLatin1String(&writer, str)" with "PyUnicodeWriter_WriteUTF8(writer, str)".

• "_PyUnicodeWriter_Prepare()": (no replacement).

• "_PyUnicodeWriter_PrepareKind()": (no replacement).

• "_Py_HashPointer()": use "Py_HashPointer()".

• "_Py_fopen_obj()": use "Py_fopen()".

The pythoncapi-compat project can be used to get these new public functions on Python 3.13 and older. (Contributed by Victor Stinner in gh-128863.)