reject None as the buffering argument like the C implementation does #8546
diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 8098681..cafc51c 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -40,7 +40,7 @@
self.characters_written = characters_written
-def open(file, mode="r", buffering=None,
+def open(file, mode="r", buffering=-1,
encoding=None, errors=None,
newline=None, closefd=True):
@@ -155,7 +155,7 @@
raise TypeError("invalid file: %r" % file)
if not isinstance(mode, basestring):
raise TypeError("invalid mode: %r" % mode)
- if buffering is not None and not isinstance(buffering, (int, long)):
+ if not isinstance(buffering, (int, long)):
raise TypeError("invalid buffering: %r" % buffering)
if encoding is not None and not isinstance(encoding, basestring):
raise TypeError("invalid encoding: %r" % encoding)
@@ -192,8 +192,6 @@
(appending and "a" or "") +
(updating and "+" or ""),
closefd)
- if buffering is None:
- buffering = -1
line_buffering = False
if buffering == 1 or buffering < 0 and raw.isatty():
buffering = -1