commit 1d857453b7065dafdc34a72c1bbb2a993782b383
author Antoine Pitrou <solipsis@pitrou.net> Wed Sep 05 20:11:49 2012 +0200
committer Antoine Pitrou <solipsis@pitrou.net> Wed Sep 05 20:11:49 2012 +0200
tree e1ba8cd8fd1fb6d2b811e96632e8efefa97a2d51
parent 397e5c98bc27416fe8a407e39e4c5aa4baf94423

Issue #15841: The readable(), writable() and seekable() methods of BytesIO
and StringIO objects now raise ValueError when the object has been closed.
Patch by Alessandro Moura.

Modules/_io/stringio.c

diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
index c9d14b1..1f1fa40 100644
--- a/Modules/_io/stringio.c
+++ b/Modules/_io/stringio.c
@@ -650,10 +650,21 @@
 }
 
 /* Properties and pseudo-properties */
+
+PyDoc_STRVAR(stringio_readable_doc,
+"readable() -> bool. Returns True if the IO object can be read.");
+
+PyDoc_STRVAR(stringio_writable_doc,
+"writable() -> bool. Returns True if the IO object can be written.");
+
+PyDoc_STRVAR(stringio_seekable_doc,
+"seekable() -> bool. Returns True if the IO object can be seeked.");
+
 static PyObject *
 stringio_seekable(stringio *self, PyObject *args)
 {
     CHECK_INITIALIZED(self);
+    CHECK_CLOSED(self);
     Py_RETURN_TRUE;
 }
 
@@ -661,6 +672,7 @@
 stringio_readable(stringio *self, PyObject *args)
 {
     CHECK_INITIALIZED(self);
+    CHECK_CLOSED(self);
     Py_RETURN_TRUE;
 }
 
@@ -668,6 +680,7 @@
 stringio_writable(stringio *self, PyObject *args)
 {
     CHECK_INITIALIZED(self);
+    CHECK_CLOSED(self);
     Py_RETURN_TRUE;
 }
 
@@ -835,9 +848,9 @@
     {"seek",     (PyCFunction)stringio_seek,     METH_VARARGS, stringio_seek_doc},
     {"write",    (PyCFunction)stringio_write,    METH_O,       stringio_write_doc},
 
-    {"seekable", (PyCFunction)stringio_seekable, METH_NOARGS},
-    {"readable", (PyCFunction)stringio_readable, METH_NOARGS},
-    {"writable", (PyCFunction)stringio_writable, METH_NOARGS},
+    {"seekable", (PyCFunction)stringio_seekable, METH_NOARGS, stringio_seekable_doc},
+    {"readable", (PyCFunction)stringio_readable, METH_NOARGS, stringio_readable_doc},
+    {"writable", (PyCFunction)stringio_writable, METH_NOARGS, stringio_writable_doc},
 
     {"__getstate__", (PyCFunction)stringio_getstate, METH_NOARGS},
     {"__setstate__", (PyCFunction)stringio_setstate, METH_O},