http://hg.python.org/cpython/rev/524931e5aebf
changeset: 78852:524931e5aebf
branch: 3.2
parent: 78848:c49f89261d65
user: Antoine Pitrou <solipsis at pitrou.net>
date: Wed Sep 05 20:11:49 2012 +0200
summary:
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.
files:
Lib/_pyio.py | 8 ++++++++
Lib/test/test_memoryio.py | 7 +++----
Misc/ACKS | 1 +
Misc/NEWS | 4 ++++
Modules/_io/bytesio.c | 20 +++++++++++++++-----
Modules/_io/stringio.c | 19 ++++++++++++++++---
6 files changed, 47 insertions(+), 12 deletions(-)
diff --git a/Lib/_pyio.py b/Lib/_pyio.py
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -889,12 +889,18 @@
return pos
def readable(self):
+ if self.closed:
+ raise ValueError("I/O operation on closed file.")
return True
def writable(self):
+ if self.closed:
+ raise ValueError("I/O operation on closed file.")
return True
def seekable(self):
+ if self.closed:
+ raise ValueError("I/O operation on closed file.")
return True
@@ -1567,6 +1573,8 @@
return self._buffer
def seekable(self):
+ if self.closed:
+ raise ValueError("I/O operation on closed file.")
return self._seekable
def readable(self):
diff --git a/Lib/test/test_memoryio.py b/Lib/test/test_memoryio.py
--- a/Lib/test/test_memoryio.py
+++ b/Lib/test/test_memoryio.py
@@ -318,9 +318,9 @@
self.assertEqual(memio.isatty(), False)
self.assertEqual(memio.closed, False)
memio.close()
- self.assertEqual(memio.writable(), True)
- self.assertEqual(memio.readable(), True)
- self.assertEqual(memio.seekable(), True)
+ self.assertRaises(ValueError, memio.writable)
+ self.assertRaises(ValueError, memio.readable)
+ self.assertRaises(ValueError, memio.seekable)
self.assertRaises(ValueError, memio.isatty)
self.assertEqual(memio.closed, True)
@@ -665,7 +665,6 @@
check(io.BytesIO(b'a'), basesize + 1 + 1 )
check(io.BytesIO(b'a' * 1000), basesize + 1000 + 1 )
-
class CStringIOTest(PyStringIOTest):
ioclass = io.StringIO
UnsupportedOperation = io.UnsupportedOperation
diff --git a/Misc/ACKS b/Misc/ACKS
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -658,6 +658,7 @@
Paul Moore
Derek Morr
James A Morrison
+Alessandro Moura
Pablo Mouzo
Mher Movsisyan
Ruslan Mstoi
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -115,6 +115,10 @@
Library
-------
+- 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.
+
- Issue #15509: webbrowser.UnixBrowser no longer passes empty arguments to
Popen when %action substitutions produce empty strings.
diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c
--- a/Modules/_io/bytesio.c
+++ b/Modules/_io/bytesio.c
@@ -121,7 +121,7 @@
}
/* Internal routine for writing a string of bytes to the buffer of a BytesIO
- object. Returns the number of bytes wrote, or -1 on error. */
+ object. Returns the number of bytes written, or -1 on error. */
static Py_ssize_t
write_bytes(bytesio *self, const char *bytes, Py_ssize_t len)
{
@@ -171,10 +171,20 @@
}
}
+PyDoc_STRVAR(readable_doc,
+"readable() -> bool. Returns True if the IO object can be read.");
+
+PyDoc_STRVAR(writable_doc,
+"writable() -> bool. Returns True if the IO object can be written.");
+
+PyDoc_STRVAR(seekable_doc,
+"seekable() -> bool. Returns True if the IO object can be seeked.");
+
/* Generic getter for the writable, readable and seekable properties */
static PyObject *
-return_true(bytesio *self)
+return_not_closed(bytesio *self)
{
+ CHECK_CLOSED(self);
Py_RETURN_TRUE;
}
@@ -867,9 +877,9 @@
};
static struct PyMethodDef bytesio_methods[] = {
- {"readable", (PyCFunction)return_true, METH_NOARGS, NULL},
- {"seekable", (PyCFunction)return_true, METH_NOARGS, NULL},
- {"writable", (PyCFunction)return_true, METH_NOARGS, NULL},
+ {"readable", (PyCFunction)return_not_closed, METH_NOARGS, readable_doc},
+ {"seekable", (PyCFunction)return_not_closed, METH_NOARGS, seekable_doc},
+ {"writable", (PyCFunction)return_not_closed, METH_NOARGS, writable_doc},
{"close", (PyCFunction)bytesio_close, METH_NOARGS, close_doc},
{"flush", (PyCFunction)bytesio_flush, METH_NOARGS, flush_doc},
{"isatty", (PyCFunction)bytesio_isatty, METH_NOARGS, isatty_doc},
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
--- 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},
--
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