cpython/Doc/library/select.rst

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:mod:`select` --- Waiting for I/O completion
============================================
.. module:: select
:synopsis: Wait for I/O completion on multiple streams.
This module provides access to the :cfunc:`select` and :cfunc:`poll` functions
available in most operating systems, :cfunc:`epoll` available on Linux 2.5+ and
:cfunc:`kqueue` available on most BSD.
Note that on Windows, it only works for sockets; on other operating systems,
it also works for other file types (in particular, on Unix, it works on pipes).
It cannot be used on regular files to determine whether a file has grown since
it was last read.
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The module defines the following:
.. exception:: error
The exception raised when an error occurs. The accompanying value is a pair
containing the numeric error code from :cdata:`errno` and the corresponding
string, as would be printed by the C function :cfunc:`perror`.
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.. function:: epoll([sizehint=-1])
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(Only supported on Linux 2.5.44 and newer.) Returns an edge polling object,
which can be used as Edge or Level Triggered interface for I/O events; see
section :ref:`epoll-objects` below for the methods supported by epolling
objects.
.. versionadded:: 2.6
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.. function:: poll()
(Not supported by all operating systems.) Returns a polling object, which
supports registering and unregistering file descriptors, and then polling them
for I/O events; see section :ref:`poll-objects` below for the methods supported
by polling objects.
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.. function:: kqueue()
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(Only supported on BSD.) Returns a kernel queue object object; see section
:ref:`kqueue-objects` below for the methods supported by kqueue objects.
.. versionadded:: 2.6
Merged revisions 77120,77151,77155,77209,77229,77256,77317,77331,77333,77359-77360,77382,77561,77570 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77120 | georg.brandl | 2009-12-29 22:09:17 +0100 (Di, 29 Dez 2009) | 1 line #7595: fix typo in argument default constant. ........ r77151 | georg.brandl | 2009-12-30 19:32:50 +0100 (Mi, 30 Dez 2009) | 1 line #7487: update Pygments version. ........ r77155 | georg.brandl | 2009-12-30 20:03:00 +0100 (Mi, 30 Dez 2009) | 1 line We only support Windows NT derivatives now. ........ r77209 | georg.brandl | 2010-01-01 14:07:05 +0100 (Fr, 01 Jan 2010) | 1 line More yearly updates. ........ r77229 | georg.brandl | 2010-01-02 13:35:01 +0100 (Sa, 02 Jan 2010) | 1 line Fix casing. ........ r77256 | georg.brandl | 2010-01-02 23:55:55 +0100 (Sa, 02 Jan 2010) | 1 line Fix typo. ........ r77317 | georg.brandl | 2010-01-05 19:14:52 +0100 (Di, 05 Jan 2010) | 1 line Add Stefan. ........ r77331 | georg.brandl | 2010-01-06 18:43:06 +0100 (Mi, 06 Jan 2010) | 1 line Small fixes to test_cmd: fix signature of do_shell, remove duplicate import, add option to run the custom Cmd class. ........ r77333 | georg.brandl | 2010-01-06 19:26:08 +0100 (Mi, 06 Jan 2010) | 1 line #5950: document that zip files with comments are unsupported in zipimport. ........ r77359 | georg.brandl | 2010-01-07 21:54:45 +0100 (Do, 07 Jan 2010) | 1 line Fix description for Py_GetPath(); it sounded like it always returned sys.path. ........ r77360 | georg.brandl | 2010-01-07 22:48:47 +0100 (Do, 07 Jan 2010) | 1 line #7653: clarify how the PythonPath registry key should look like. ........ r77382 | georg.brandl | 2010-01-09 10:47:11 +0100 (Sa, 09 Jan 2010) | 1 line #7422: make it clear that getargspec() only works on Python functions. ........ r77561 | georg.brandl | 2010-01-17 09:42:30 +0100 (So, 17 Jan 2010) | 1 line #7699: improve datetime docs: straightforward linking to strftime/strptime section, mark classmethods as such. ........ r77570 | georg.brandl | 2010-01-17 13:14:42 +0100 (So, 17 Jan 2010) | 1 line Add note about usage of STRINGLIB_EMPTY. ........
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.. function:: kevent(ident, filter=KQ_FILTER_READ, flags=KQ_EV_ADD, fflags=0, data=0, udata=0)
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(Only supported on BSD.) Returns a kernel event object object; see section
:ref:`kevent-objects` below for the methods supported by kqueue objects.
.. versionadded:: 2.6
.. function:: select(rlist, wlist, xlist[, timeout])
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This is a straightforward interface to the Unix :cfunc:`select` system call.
The first three arguments are sequences of 'waitable objects': either
integers representing file descriptors or objects with a parameterless method
named :meth:`fileno` returning such an integer:
* *rlist*: wait until ready for reading
* *wlist*: wait until ready for writing
* *xlist*: wait for an "exceptional condition" (see the manual page for what
your system considers such a condition)
Empty sequences are allowed, but acceptance of three empty sequences is
platform-dependent. (It is known to work on Unix but not on Windows.) The
optional *timeout* argument specifies a time-out as a floating point number
in seconds. When the *timeout* argument is omitted the function blocks until
at least one file descriptor is ready. A time-out value of zero specifies a
poll and never blocks.
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The return value is a triple of lists of objects that are ready: subsets of the
first three arguments. When the time-out is reached without a file descriptor
becoming ready, three empty lists are returned.
.. index::
single: socket() (in module socket)
single: popen() (in module os)
Among the acceptable object types in the sequences are Python file objects (e.g.
``sys.stdin``, or objects returned by :func:`open` or :func:`os.popen`), socket
objects returned by :func:`socket.socket`. You may also define a :dfn:`wrapper`
class yourself, as long as it has an appropriate :meth:`fileno` method (that
really returns a file descriptor, not just a random integer).
.. note::
.. index:: single: WinSock
File objects on Windows are not acceptable, but sockets are. On Windows,
the underlying :cfunc:`select` function is provided by the WinSock
library, and does not handle file descriptors that don't originate from
WinSock.
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.. _epoll-objects:
Edge and Level Trigger Polling (epoll) Objects
----------------------------------------------
http://linux.die.net/man/4/epoll
*eventmask*
+-----------------------+-----------------------------------------------+
| Constant | Meaning |
+=======================+===============================================+
| :const:`EPOLLIN` | Available for read |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLOUT` | Available for write |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLPRI` | Urgent data for read |
+-----------------------+-----------------------------------------------+
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| :const:`EPOLLERR` | Error condition happened on the assoc. fd |
+-----------------------+-----------------------------------------------+
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| :const:`EPOLLHUP` | Hang up happened on the assoc. fd |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLET` | Set Edge Trigger behavior, the default is |
| | Level Trigger behavior |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLONESHOT` | Set one-shot behavior. After one event is |
| | pulled out, the fd is internally disabled |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLRDNORM` | ??? |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLRDBAND` | ??? |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLWRNORM` | ??? |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLWRBAND` | ??? |
+-----------------------+-----------------------------------------------+
| :const:`EPOLLMSG` | ??? |
+-----------------------+-----------------------------------------------+
.. method:: epoll.close()
Close the control file descriptor of the epoll object.
.. method:: epoll.fileno()
Return the file descriptor number of the control fd.
.. method:: epoll.fromfd(fd)
Create an epoll object from a given file descriptor.
.. method:: epoll.register(fd[, eventmask])
Register a fd descriptor with the epoll object.
.. note::
Registering a file descriptor that's already registered raises an
IOError -- contrary to :ref:`poll-objects`'s register.
.. method:: epoll.modify(fd, eventmask)
Modify a register file descriptor.
.. method:: epoll.unregister(fd)
Remove a registered file descriptor from the epoll object.
.. method:: epoll.poll([timeout=-1[, maxevents=-1]])
Wait for events. timeout in seconds (float)
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.. _poll-objects:
Polling Objects
---------------
The :cfunc:`poll` system call, supported on most Unix systems, provides better
scalability for network servers that service many, many clients at the same
time. :cfunc:`poll` scales better because the system call only requires listing
the file descriptors of interest, while :cfunc:`select` builds a bitmap, turns
on bits for the fds of interest, and then afterward the whole bitmap has to be
linearly scanned again. :cfunc:`select` is O(highest file descriptor), while
:cfunc:`poll` is O(number of file descriptors).
.. method:: poll.register(fd[, eventmask])
Register a file descriptor with the polling object. Future calls to the
:meth:`poll` method will then check whether the file descriptor has any pending
I/O events. *fd* can be either an integer, or an object with a :meth:`fileno`
method that returns an integer. File objects implement :meth:`fileno`, so they
can also be used as the argument.
*eventmask* is an optional bitmask describing the type of events you want to
check for, and can be a combination of the constants :const:`POLLIN`,
:const:`POLLPRI`, and :const:`POLLOUT`, described in the table below. If not
specified, the default value used will check for all 3 types of events.
+-------------------+------------------------------------------+
| Constant | Meaning |
+===================+==========================================+
| :const:`POLLIN` | There is data to read |
+-------------------+------------------------------------------+
| :const:`POLLPRI` | There is urgent data to read |
+-------------------+------------------------------------------+
| :const:`POLLOUT` | Ready for output: writing will not block |
+-------------------+------------------------------------------+
| :const:`POLLERR` | Error condition of some sort |
+-------------------+------------------------------------------+
| :const:`POLLHUP` | Hung up |
+-------------------+------------------------------------------+
| :const:`POLLNVAL` | Invalid request: descriptor not open |
+-------------------+------------------------------------------+
Registering a file descriptor that's already registered is not an error, and has
the same effect as registering the descriptor exactly once.
.. method:: poll.modify(fd, eventmask)
Modifies an already registered fd. This has the same effect as
:meth:`register(fd, eventmask)`. Attempting to modify a file descriptor
that was never registered causes an :exc:`IOError` exception with errno
:const:`ENOENT` to be raised.
.. versionadded:: 2.6
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.. method:: poll.unregister(fd)
Remove a file descriptor being tracked by a polling object. Just like the
:meth:`register` method, *fd* can be an integer or an object with a
:meth:`fileno` method that returns an integer.
Attempting to remove a file descriptor that was never registered causes a
:exc:`KeyError` exception to be raised.
.. method:: poll.poll([timeout])
Polls the set of registered file descriptors, and returns a possibly-empty list
containing ``(fd, event)`` 2-tuples for the descriptors that have events or
errors to report. *fd* is the file descriptor, and *event* is a bitmask with
bits set for the reported events for that descriptor --- :const:`POLLIN` for
waiting input, :const:`POLLOUT` to indicate that the descriptor can be written
to, and so forth. An empty list indicates that the call timed out and no file
descriptors had any events to report. If *timeout* is given, it specifies the
length of time in milliseconds which the system will wait for events before
returning. If *timeout* is omitted, negative, or :const:`None`, the call will
block until there is an event for this poll object.
.. _kqueue-objects:
Kqueue Objects
--------------
.. method:: kqueue.close()
Close the control file descriptor of the kqueue object.
.. method:: kqueue.fileno()
Return the file descriptor number of the control fd.
.. method:: kqueue.fromfd(fd)
Create a kqueue object from a given file descriptor.
.. method:: kqueue.control(changelist, max_events[, timeout=None]) -> eventlist
Low level interface to kevent
- changelist must be an iterable of kevent object or None
- max_events must be 0 or a positive integer
- timeout in seconds (floats possible)
.. _kevent-objects:
Kevent Objects
--------------
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http://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
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.. attribute:: kevent.ident
Value used to identify the event. The interpretation depends on the filter
but it's usually the file descriptor. In the constructor ident can either
be an int or an object with a fileno() function. kevent stores the integer
internally.
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.. attribute:: kevent.filter
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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Name of the kernel filter.
+---------------------------+---------------------------------------------+
| Constant | Meaning |
+===========================+=============================================+
| :const:`KQ_FILTER_READ` | Takes a descriptor and returns whenever |
| | there is data available to read |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_WRITE` | Takes a descriptor and returns whenever |
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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| | there is data available to write |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_AIO` | AIO requests |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_VNODE` | Returns when one or more of the requested |
| | events watched in *fflag* occurs |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_PROC` | Watch for events on a process id |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_NETDEV` | Watch for events on a network device |
| | [not available on Mac OS X] |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_SIGNAL` | Returns whenever the watched signal is |
| | delivered to the process |
+---------------------------+---------------------------------------------+
| :const:`KQ_FILTER_TIMER` | Establishes an arbitrary timer |
+---------------------------+---------------------------------------------+
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.. attribute:: kevent.flags
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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Filter action.
+---------------------------+---------------------------------------------+
| Constant | Meaning |
+===========================+=============================================+
| :const:`KQ_EV_ADD` | Adds or modifies an event |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_DELETE` | Removes an event from the queue |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_ENABLE` | Permitscontrol() to returns the event |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_DISABLE` | Disablesevent |
+---------------------------+---------------------------------------------+
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| :const:`KQ_EV_ONESHOT` | Removes event after first occurrence |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_CLEAR` | Reset the state after an event is retrieved |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_SYSFLAGS` | internal event |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_FLAG1` | internal event |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_EOF` | Filter specific EOF condition |
+---------------------------+---------------------------------------------+
| :const:`KQ_EV_ERROR` | See return values |
+---------------------------+---------------------------------------------+
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.. attribute:: kevent.fflags
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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Filter specific flags.
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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:const:`KQ_FILTER_READ` and :const:`KQ_FILTER_WRITE` filter flags:
+----------------------------+--------------------------------------------+
| Constant | Meaning |
+============================+============================================+
| :const:`KQ_NOTE_LOWAT` | low water mark of a socket buffer |
+----------------------------+--------------------------------------------+
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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:const:`KQ_FILTER_VNODE` filter flags:
+----------------------------+--------------------------------------------+
| Constant | Meaning |
+============================+============================================+
| :const:`KQ_NOTE_DELETE` | *unlink()* was called |
+----------------------------+--------------------------------------------+
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| :const:`KQ_NOTE_WRITE` | a write occurred |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_EXTEND` | the file was extended |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_ATTRIB` | an attribute was changed |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_LINK` | the link count has changed |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_RENAME` | the file was renamed |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_REVOKE` | access to the file was revoked |
+----------------------------+--------------------------------------------+
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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:const:`KQ_FILTER_PROC` filter flags:
+----------------------------+--------------------------------------------+
| Constant | Meaning |
+============================+============================================+
| :const:`KQ_NOTE_EXIT` | the process has exited |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_FORK` | the process has called *fork()* |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_EXEC` | the process has executed a new process |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_PCTRLMASK` | internal filter flag |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_PDATAMASK` | internal filter flag |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_TRACK` | follow a process across *fork()* |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_CHILD` | returned on the child process for |
| | *NOTE_TRACK* |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_TRACKERR` | unable to attach to a child |
+----------------------------+--------------------------------------------+
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
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:const:`KQ_FILTER_NETDEV` filter flags (not available on Mac OS X):
+----------------------------+--------------------------------------------+
| Constant | Meaning |
+============================+============================================+
| :const:`KQ_NOTE_LINKUP` | link is up |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_LINKDOWN` | link is down |
+----------------------------+--------------------------------------------+
| :const:`KQ_NOTE_LINKINV` | link state is invalid |
+----------------------------+--------------------------------------------+
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.. attribute:: kevent.data
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
2009-10-27 11:41:50 -03:00
Filter specific data.
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.. attribute:: kevent.udata
Merged revisions 74210,74239,74252-74253,74256,74258-74261,74332-74333,74404,74411,74445,74465,74467,74488 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r74210 | georg.brandl | 2009-07-26 16:44:23 +0200 (So, 26 Jul 2009) | 1 line Move member descriptions inside the classes. ........ r74239 | georg.brandl | 2009-07-28 20:55:32 +0200 (Di, 28 Jul 2009) | 1 line Clarify quote_plus() usage. ........ r74252 | georg.brandl | 2009-07-29 18:06:31 +0200 (Mi, 29 Jul 2009) | 1 line #6593: fix link targets. ........ r74253 | georg.brandl | 2009-07-29 18:09:17 +0200 (Mi, 29 Jul 2009) | 1 line #6591: add reference to ioctl in fcntl module for platforms other than Windows. ........ r74256 | georg.brandl | 2009-07-29 18:32:30 +0200 (Mi, 29 Jul 2009) | 1 line #6336: Add nb_divide. ........ r74258 | georg.brandl | 2009-07-29 18:57:05 +0200 (Mi, 29 Jul 2009) | 1 line Add a link to readline, and mention IPython and bpython. ........ r74259 | georg.brandl | 2009-07-29 19:07:21 +0200 (Mi, 29 Jul 2009) | 1 line Fix some markup and small factual glitches found by M. Markert. ........ r74260 | georg.brandl | 2009-07-29 19:15:20 +0200 (Mi, 29 Jul 2009) | 1 line Fix a few markup glitches. ........ r74261 | georg.brandl | 2009-07-29 19:50:25 +0200 (Mi, 29 Jul 2009) | 1 line Rewrite the section about classes a bit; mostly tidbits, and a larger update to the section about "private" variables to reflect the Pythonic consensus better. ........ r74332 | georg.brandl | 2009-08-06 19:23:21 +0200 (Do, 06 Aug 2009) | 1 line Fix punctuation and one copy-paste error. ........ r74333 | georg.brandl | 2009-08-06 19:43:55 +0200 (Do, 06 Aug 2009) | 1 line #6658: fix two typos. ........ r74404 | georg.brandl | 2009-08-13 14:05:52 +0200 (Do, 13 Aug 2009) | 1 line Use locale.format_string() for more than one specifier. ........ r74411 | georg.brandl | 2009-08-13 14:57:25 +0200 (Do, 13 Aug 2009) | 2 lines Remove potentially confusing sentence in __mangling description. ........ r74445 | vinay.sajip | 2009-08-14 13:33:54 +0200 (Fr, 14 Aug 2009) | 1 line Added versionchanged notices for optional 'delay' parameter to file handler classes. ........ r74465 | vinay.sajip | 2009-08-16 01:23:12 +0200 (So, 16 Aug 2009) | 1 line Added section on logging to one file from multiple processes. ........ r74467 | vinay.sajip | 2009-08-16 01:34:47 +0200 (So, 16 Aug 2009) | 1 line Refined section on logging to one file from multiple processes. ........ r74488 | vinay.sajip | 2009-08-17 15:14:37 +0200 (Mo, 17 Aug 2009) | 1 line Further refined section on logging to one file from multiple processes. ........
2009-10-27 11:41:50 -03:00
User defined value.