http://hg.python.org/cpython/rev/e8851809ae83 changeset: 78323:e8851809ae83 branch: 2.7 parent: 78320:1102e86b8739 user: Antoine Pitrou <solipsis@pitrou.net> date: Mon Jul 30 00:01:06 2012 +0200 summary: Issue #15489: Add a __sizeof__ implementation for BytesIO objects. Patch by Serhiy Storchaka. files: Lib/test/test_memoryio.py | 11 +++++++++++ Misc/NEWS | 3 +++ Modules/_io/bytesio.c | 12 ++++++++++++ 3 files changed, 26 insertions(+), 0 deletions(-) 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 @@ -638,6 +638,17 @@ memio.close() self.assertRaises(ValueError, memio.__setstate__, (b"closed", 0, None)) + check_sizeof = support.check_sizeof + + @support.cpython_only + def test_sizeof(self): + basesize = support.calcobjsize(b'P2PP2P') + check = self.check_sizeof + self.assertEqual(object.__sizeof__(io.BytesIO()), basesize) + check(io.BytesIO(), basesize ) + check(io.BytesIO(b'a'), basesize + 1 + 1 ) + check(io.BytesIO(b'a' * 1000), basesize + 1000 + 1 ) + class CStringIOTest(PyStringIOTest): ioclass = io.StringIO diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -92,6 +92,9 @@ Library ------- +- Issue #15489: Add a __sizeof__ implementation for BytesIO objects. + Patch by Serhiy Storchaka. + - Issue #15487: Add a __sizeof__ implementation for buffered I/O objects. Patch by Serhiy Storchaka. diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c --- a/Modules/_io/bytesio.c +++ b/Modules/_io/bytesio.c @@ -794,6 +794,17 @@ return 0; } +static PyObject * +bytesio_sizeof(bytesio *self, void *unused) +{ + Py_ssize_t res; + + res = sizeof(bytesio); + if (self->buf) + res += self->buf_size; + return PyLong_FromSsize_t(res); +} + static int bytesio_traverse(bytesio *self, visitproc visit, void *arg) { @@ -835,6 +846,7 @@ {"truncate", (PyCFunction)bytesio_truncate, METH_VARARGS, truncate_doc}, {"__getstate__", (PyCFunction)bytesio_getstate, METH_NOARGS, NULL}, {"__setstate__", (PyCFunction)bytesio_setstate, METH_O, NULL}, + {"__sizeof__", (PyCFunction)bytesio_sizeof, METH_NOARGS, NULL}, {NULL, NULL} /* sentinel */ }; -- Repository URL: http://hg.python.org/cpython