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authorVinay Sajip <vinay_sajip@yahoo.co.uk>2010-09-12 11:51:26 (GMT)
committerVinay Sajip <vinay_sajip@yahoo.co.uk>2010-09-12 11:51:26 (GMT)
commit7f536b03a28d11b64a9e6657a6dbd9ad05d37b2f (patch)
treea773fbf317aea93026870658211e6130499802bd /Doc
parent2b65fc8aedf19de1d4fb345dbdde5ee9b40e260c (diff)
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Issue #9827: clarified LogRecord documentation a little more.
Diffstat (limited to 'Doc')
-rw-r--r--Doc/library/logging.rst63
1 files changed, 47 insertions, 16 deletions
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index bcc1cda..a58638d 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -2550,27 +2550,58 @@ been applied to those descendant loggers.
LogRecord Objects
-----------------
-:class:`LogRecord` instances are created every time something is logged. They
-contain all the information pertinent to the event being logged. The main
-information passed in is in msg and args, which are combined using msg % args to
-create the message field of the record. The record also includes information
-such as when the record was created, the source line where the logging call was
-made, and any exception information to be logged.
+:class:`LogRecord` instances are created automatically by the :class:`Logger`
+every time something is logged, and can be created manually via
+:func:`makeLogRecord` (for example, from a pickled event received over the
+wire).
.. class:: LogRecord(name, lvl, pathname, lineno, msg, args, exc_info, func=None)
- Returns an instance of :class:`LogRecord` initialized with interesting
- information. The *name* is the logger name; *lvl* is the numeric level;
- *pathname* is the absolute pathname of the source file in which the logging
- call was made; *lineno* is the line number in that file where the logging
- call is found; *msg* is the user-supplied message (a format string); *args*
- is the tuple which, together with *msg*, makes up the user message; and
- *exc_info* is the exception tuple obtained by calling :func:`sys.exc_info`
- (or :const:`None`, if no exception information is available). The *func* is
- the name of the function from which the logging call was made. If not
- specified, it defaults to ``None``.
+ Contains all the information pertinent to the event being logged.
+ The primary information is passed in :attr:`msg` and :attr:`args`, which
+ are combined using ``msg % args`` to create the :attr:`message` field of the
+ record.
+
+ .. attribute:: args
+
+ Tuple of arguments to be used in formatting :attr:`msg`.
+
+ .. attribute:: exc_info
+
+ Exception tuple (à la `sys.exc_info`) or `None` if no exception
+ information is availble.
+
+ .. attribute:: func
+
+ Name of the function of origin (i.e. in which the logging call was made).
+
+ .. attribute:: lineno
+
+ Line number in the source file of origin.
+
+ .. attribute:: lvl
+
+ Numeric logging level.
+
+ .. attribute:: message
+
+ Bound to the result of :meth:`getMessage` when
+ :meth:`Formatter.format(record)<Formatter.format>` is invoked.
+
+ .. attribute:: msg
+
+ User-supplied :ref:`format string<string-formatting>` or arbitrary object
+ (see :ref:`arbitrary-object-messages`) used in :meth:`getMessage`.
+
+ .. attribute:: name
+
+ Name of the logger that emitted the record.
+
+ .. attribute:: pathname
+
+ Absolute pathname of the source file of origin.
.. method:: getMessage()