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#8213: document behavior of -u on py3k better.

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This commit is contained in:
Georg Brandl 2010-04-02 08:47:07 +00:00
parent 0f3ec6dd62
commit 379299cecc
2 changed files with 9 additions and 8 deletions
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5
Doc/using/cmdline.rst
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@ -232,8 +232,9 @@ Miscellaneous options
.. cmdoption:: -u
Force stdin, stdout and stderr to be totally unbuffered. On systems where it
matters, also put stdin, stdout and stderr in binary mode.
Force the binary layer of the stdin, stdout and stderr streams (which is
available as their ``buffer`` attribute) to be unbuffered. The text I/O
layer will still be line-buffered.
See also :envvar:`PYTHONUNBUFFERED`.

12
Misc/python.man
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@ -165,12 +165,12 @@ and the site-dependent manipulations of
that it entails.
.TP
.B \-u
Force stdin, stdout and stderr to be totally unbuffered. On systems
where it matters, also put stdin, stdout and stderr in binary mode.
Note that there is internal buffering in readlines() and
file-object iterators ("for line in sys.stdin") which is not
influenced by this option. To work around this, you will want to use
"sys.stdin.readline()" inside a "while 1:" loop.
Force the binary I/O layers of stdin, stdout and stderr to be unbuffered.
The text I/O layer will still be line-buffered.
.\" Note that there is internal buffering in readlines() and
.\" file-object iterators ("for line in sys.stdin") which is not
.\" influenced by this option. To work around this, you will want to use
.\" "sys.stdin.readline()" inside a "while 1:" loop.
.TP
.B \-v
Print a message each time a module is initialized, showing the place