just throw a normal AttributeError for no buffer attribute
diff --git a/Misc/NEWS b/Misc/NEWS
index 407681b..1ec5c53 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,9 @@
Library
-------
+- Accessing io.StringIO.buffer now raises an AttributeError instead of
+ io.UnsupportedOperation.
+
- Issue #6271: mmap tried to close invalid file handle (-1) when annonymous.
(On Unix)
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
index 57dacf9..84a15be 100644
--- a/Modules/_io/stringio.c
+++ b/Modules/_io/stringio.c
@@ -646,14 +646,6 @@
}
static PyObject *
-stringio_buffer(stringio *self, void *context)
-{
- PyErr_SetString(IO_STATE->unsupported_operation,
- "buffer attribute is unsupported on type StringIO");
- return NULL;
-}
-
-static PyObject *
stringio_closed(stringio *self, void *context)
{
CHECK_INITIALIZED(self);
@@ -703,7 +695,6 @@
Hopefully, a better solution, than adding these pseudo-attributes,
will be found.
*/
- {"buffer", (getter)stringio_buffer, NULL, NULL},
{"line_buffering", (getter)stringio_line_buffering, NULL, NULL},
{NULL}
};