1 files changed, 13 insertions, 0 deletions
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 3f22e7c772..ab6207be94 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -2784,6 +2784,17 @@ string_fromhex(PyObject *cls, PyObject *args)
 	return NULL;
 }
 
+PyDoc_STRVAR(sizeof__doc__,
+"S.__sizeof__() -> size of S in memory, in bytes");
+
+static PyObject *
+string_sizeof(PyBytesObject *v)
+{
+	Py_ssize_t res;
+	res = sizeof(PyBytesObject) + Py_SIZE(v) * Py_TYPE(v)->tp_itemsize;
+	return PyLong_FromSsize_t(res);
+}
+
 
 static PyObject *
 string_getnewargs(PyBytesObject *v)
@@ -2848,6 +2859,8 @@ string_methods[] = {
 	 translate__doc__},
 	{"upper", (PyCFunction)stringlib_upper, METH_NOARGS, _Py_upper__doc__},
 	{"zfill", (PyCFunction)stringlib_zfill, METH_VARARGS, zfill__doc__},
+	{"__sizeof__", (PyCFunction)string_sizeof, METH_NOARGS,
+	 sizeof__doc__},
 	{NULL,     NULL}		     /* sentinel */
 };