mirror of https://github.com/python/cpython
Added more cross-reference targets and tidied up list of useful handlers.
This commit is contained in:
Vinay Sajip
parent
5848d1ff35
commit
4b78233cbd
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@ -310,7 +310,7 @@ date format string, the default date format is::
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with the milliseconds tacked on at the end.
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The message format string uses ``%(<dictionary key>)s`` styled string
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substitution; the possible keys are documented in :ref:`formatter-objects`.
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substitution; the possible keys are documented in :ref:`formatter`.
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The following message format string will log the time in a human-readable
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format, the severity of the message, and the contents of the message, in that
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@ -530,53 +530,49 @@ Useful Handlers
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In addition to the base :class:`Handler` class, many useful subclasses are
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provided:
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#. :class:`StreamHandler` instances send error messages to streams (file-like
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#. :ref:`stream-handler` instances send error messages to streams (file-like
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objects).
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#. :class:`FileHandler` instances send error messages to disk files.
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.. module:: logging.handlers
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#. :ref:`file-handler` instances send error messages to disk files.
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#. :class:`BaseRotatingHandler` is the base class for handlers that
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rotate log files at a certain point. It is not meant to be instantiated
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directly. Instead, use :class:`RotatingFileHandler` or
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:class:`TimedRotatingFileHandler`.
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directly. Instead, use :ref:`rotating-file-handler` or
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:ref:`timed-rotating-file-handler`.
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#. :class:`RotatingFileHandler` instances send error messages to disk
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#. :ref:`rotating-file-handler` instances send error messages to disk
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files, with support for maximum log file sizes and log file rotation.
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#. :class:`TimedRotatingFileHandler` instances send error messages to
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#. :ref:`timed-rotating-file-handler` instances send error messages to
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disk files, rotating the log file at certain timed intervals.
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#. :class:`SocketHandler` instances send error messages to TCP/IP
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#. :ref:`socket-handler` instances send error messages to TCP/IP
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sockets.
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#. :class:`DatagramHandler` instances send error messages to UDP
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#. :ref:`datagram-handler` instances send error messages to UDP
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sockets.
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#. :class:`SMTPHandler` instances send error messages to a designated
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#. :ref:`smtp-handler` instances send error messages to a designated
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email address.
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#. :class:`SysLogHandler` instances send error messages to a Unix
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#. :ref:`syslog-handler` instances send error messages to a Unix
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syslog daemon, possibly on a remote machine.
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#. :class:`NTEventLogHandler` instances send error messages to a
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#. :ref:`nt-eventlog-handler` instances send error messages to a
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Windows NT/2000/XP event log.
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#. :class:`MemoryHandler` instances send error messages to a buffer
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#. :ref:`memory-handler` instances send error messages to a buffer
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in memory, which is flushed whenever specific criteria are met.
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#. :class:`HTTPHandler` instances send error messages to an HTTP
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#. :ref:`http-handler` instances send error messages to an HTTP
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server using either ``GET`` or ``POST`` semantics.
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#. :class:`WatchedFileHandler` instances watch the file they are
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#. :ref:`watched-file-handler` instances watch the file they are
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logging to. If the file changes, it is closed and reopened using the file
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name. This handler is only useful on Unix-like systems; Windows does not
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support the underlying mechanism used.
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.. currentmodule:: logging
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#. :class:`NullHandler` instances do nothing with error messages. They are used
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#. :ref:`null-handler` instances do nothing with error messages. They are used
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by library developers who want to use logging, but want to avoid the "No
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handlers could be found for logger XXX" message which can be displayed if
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the library user has not configured logging. See :ref:`library-config` for
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@ -834,6 +830,7 @@ functions.
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and 2.2.x, which do not include the :mod:`logging` package in the standard
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library.
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.. _logger:
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Logger Objects
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--------------
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@ -1472,6 +1469,8 @@ printed on the console; on the server side, you should see something like::
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69 myapp.area2 ERROR The five boxing wizards jump quickly.
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.. _handler:
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Handler Objects
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---------------
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@ -1577,6 +1576,8 @@ subclasses. However, the :meth:`__init__` method in subclasses needs to call
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:exc:`NotImplementedError`.
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.. _stream-handler:
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StreamHandler
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^^^^^^^^^^^^^
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@ -1608,6 +1609,8 @@ and :meth:`flush` methods).
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no output, so an explicit :meth:`flush` call may be needed at times.
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.. _file-handler:
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FileHandler
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^^^^^^^^^^^
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@ -1634,6 +1637,7 @@ sends logging output to a disk file. It inherits the output functionality from
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Outputs the record to the file.
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.. _null-handler:
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NullHandler
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^^^^^^^^^^^
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@ -1657,6 +1661,8 @@ for use by library developers.
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See :ref:`library-config` for more information on how to use
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:class:`NullHandler`.
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.. _watched-file-handler:
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WatchedFileHandler
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^^^^^^^^^^^^^^^^^^
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@ -1697,6 +1703,7 @@ this value.
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changed. If it has, the existing stream is flushed and closed and the
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file opened again, before outputting the record to the file.
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.. _rotating-file-handler:
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RotatingFileHandler
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^^^^^^^^^^^^^^^^^^^
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@ -1737,6 +1744,7 @@ module, supports rotation of disk log files.
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Outputs the record to the file, catering for rollover as described
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previously.
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.. _timed-rotating-file-handler:
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TimedRotatingFileHandler
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^^^^^^^^^^^^^^^^^^^^^^^^
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@ -1795,6 +1803,8 @@ timed intervals.
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Outputs the record to the file, catering for rollover as described above.
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.. _socket-handler:
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SocketHandler
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^^^^^^^^^^^^^
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@ -1848,6 +1858,8 @@ sends logging output to a network socket. The base class uses a TCP socket.
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partial sends which can happen when the network is busy.
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.. _datagram-handler:
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DatagramHandler
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^^^^^^^^^^^^^^^
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@ -1881,6 +1893,8 @@ over UDP sockets.
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Send a pickled string to a socket.
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.. _syslog-handler:
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SysLogHandler
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^^^^^^^^^^^^^
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@ -1918,6 +1932,8 @@ supports sending logging messages to a remote or local Unix syslog.
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used to convert them to integers.
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.. _nt-eventlog-handler:
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NTEventLogHandler
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^^^^^^^^^^^^^^^^^
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@ -1983,6 +1999,7 @@ extensions for Python installed.
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lookup to get the message ID. This version returns 1, which is the base
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message ID in :file:`win32service.pyd`.
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.. _smtp-handler:
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SMTPHandler
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^^^^^^^^^^^
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@ -2014,6 +2031,7 @@ supports sending logging messages to an email address via SMTP.
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If you want to specify a subject line which is record-dependent, override
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this method.
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.. _memory-handler:
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MemoryHandler
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^^^^^^^^^^^^^
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@ -2084,6 +2102,8 @@ should, then :meth:`flush` is expected to do the needful.
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Checks for buffer full or a record at the *flushLevel* or higher.
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.. _http-handler:
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HTTPHandler
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^^^^^^^^^^^
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@ -2105,7 +2125,7 @@ supports sending logging messages to a Web server, using either ``GET`` or
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Sends the record to the Web server as an URL-encoded dictionary.
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.. _formatter-objects:
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.. _formatter:
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Formatter Objects
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-----------------
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@ -2229,11 +2249,12 @@ Currently, the useful mapping keys in a :class:`LogRecord` are:
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just uses :func:`traceback.print_exception`. The resulting string is
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returned.
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.. _filter:
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Filter Objects
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--------------
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:class:`Filter`\ s can be used by :class:`Handler`\ s and :class:`Logger`\ s for
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Filters can be used by :class:`Handler`\ s and :class:`Logger`\ s for
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more sophisticated filtering than is provided by levels. The base filter class
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only allows events which are below a certain point in the logger hierarchy. For
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example, a filter initialized with "A.B" will allow events logged by loggers
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@ -2254,6 +2275,7 @@ initialized with the empty string, all events are passed.
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yes. If deemed appropriate, the record may be modified in-place by this
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method.
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.. _log-record:
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LogRecord Objects
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-----------------
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@ -2288,6 +2310,7 @@ made, and any exception information to be logged.
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Returns the message for this :class:`LogRecord` instance after merging any
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user-supplied arguments with the message.
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.. _logger-adapter:
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LoggerAdapter Objects
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---------------------
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