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-rw-r--r--Doc/library/io.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index c3ebe9a..4511ce6 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -56,7 +56,7 @@ Module Interface
classes. :func:`.open` uses the file's blksize (as obtained by
:func:`os.stat`) if possible.
-.. function:: open(file, mode='r', buffering=None, encoding=None, errors=None, newline=None, closefd=True)
+.. function:: open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True)
Open *file* and return a corresponding stream. If the file cannot be opened,
an :exc:`IOError` is raised.