bpo-24234: Implement bytes.__bytes__ (GH-27901)

2 files changed, 39 insertions, 1 deletions

diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index eaedb0b568..13f94b4c82 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -1687,6 +1687,25 @@ static PyBufferProcs bytes_as_buffer = {
 };
 
 
+/*[clinic input]
+bytes.__bytes__
+Convert this value to exact type bytes.
+[clinic start generated code]*/
+
+static PyObject *
+bytes___bytes___impl(PyBytesObject *self)
+/*[clinic end generated code: output=63a306a9bc0caac5 input=34ec5ddba98bd6bb]*/
+{
+    if (PyBytes_CheckExact(self)) {
+        Py_INCREF(self);
+        return (PyObject *)self;
+    }
+    else {
+        return PyBytes_FromString(self->ob_sval);
+    }
+}
+
+
 #define LEFTSTRIP 0
 #define RIGHTSTRIP 1
 #define BOTHSTRIP 2
@@ -2474,6 +2493,7 @@ bytes_getnewargs(PyBytesObject *v, PyObject *Py_UNUSED(ignored))
 static PyMethodDef
 bytes_methods[] = {
     {"__getnewargs__",          (PyCFunction)bytes_getnewargs,  METH_NOARGS},
+    BYTES___BYTES___METHODDEF
     {"capitalize", stringlib_capitalize, METH_NOARGS,
      _Py_capitalize__doc__},
     STRINGLIB_CENTER_METHODDEF
diff --git a/Objects/clinic/bytesobject.c.h b/Objects/clinic/bytesobject.c.h
index 9e365ce1a0..103a364281 100644
--- a/Objects/clinic/bytesobject.c.h
+++ b/Objects/clinic/bytesobject.c.h
@@ -2,6 +2,24 @@
 preserve
 [clinic start generated code]*/
 
+PyDoc_STRVAR(bytes___bytes____doc__,
+"__bytes__($self, /)\n"
+"--\n"
+"\n"
+"Convert this value to exact type bytes.");
+
+#define BYTES___BYTES___METHODDEF    \
+    {"__bytes__", (PyCFunction)bytes___bytes__, METH_NOARGS, bytes___bytes____doc__},
+
+static PyObject *
+bytes___bytes___impl(PyBytesObject *self);
+
+static PyObject *
+bytes___bytes__(PyBytesObject *self, PyObject *Py_UNUSED(ignored))
+{
+    return bytes___bytes___impl(self);
+}
+
 PyDoc_STRVAR(bytes_split__doc__,
 "split($self, /, sep=None, maxsplit=-1)\n"
 "--\n"
@@ -878,4 +896,4 @@ skip_optional_pos:
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=b3f0ec2753246b9c input=a9049054013a1b77]*/
+/*[clinic end generated code: output=d706344859f40122 input=a9049054013a1b77]*/