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Diffstat (limited to 'Doc/library/sys.rst')
| -rw-r--r-- | Doc/library/sys.rst | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index 1278a7c..ba22dc3 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -784,13 +784,18 @@ always available. The standard streams are in text mode by default. To write or read binary data to these, use the underlying binary buffer. For example, to write bytes to :data:`stdout`, use ``sys.stdout.buffer.write(b'abc')``. Using - :meth:`io.TextIOBase.detach` streams can be made binary by default. For - example, this function sets all the standard streams to binary:: + :meth:`io.TextIOBase.detach` streams can be made binary by default. This + function sets :data:`stdin` and :data:`stdout` to binary:: def make_streams_binary(): sys.stdin = sys.stdin.detach() sys.stdout = sys.stdout.detach() - sys.stderr = sys.stderr.detach() + + Note that the streams can be replaced with objects (like + :class:`io.StringIO`) that do not support the + :attr:`~io.BufferedIOBase.buffer` attribute or the + :meth:`~io.BufferedIOBase.detach` method and can raise :exc:`AttributeError` + or :exc:`io.UnsupportedOperation`. .. data:: __stdin__ |