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This module is intended to provide error logging functionality for Python
programs. It aims to be aligned with Python Enhancement Proposal (PEP) 282.
For more information on the package itself, see python_logging.html. In it,
there is a description of each file in the distribution.
You can also use pydoc to browse the interfaces.
Change History
--------------
Version Date Description
=============================================================================
0.4.9.2 28 Feb 2004 Traceback text is now cached.
Tracebacks can be propagated across sockets as text.
Added makeLogRecord() to allow a LogRecord to be
created from a dictionary.
Closing a handler now removes it from the internal list
used by shutdown().
Made close() call flush() for handlers where this makes
sense (thanks to Jim Jewett).
The exc_info keyword parameter can be used to pass an
exception tuple as well as a flag indicating that the
current exception should be logged.
A shutdown hook is registered to call shutdown() on
application (Python) exit (thanks to Jim Jewett).
Removed redundant error check in setLoggerClass().
Added RESET_ERROR to logging.config.
SocketHandler now uses an exponential backoff strategy
(thanks to Robert Olson).
Minor documentation corrections.
-----------------------------------------------------------------------------
0.4.8 22 Apr 2003 Made _listener global in stopListening().
Made listen() correctly pass the specified port.
Removed some redundant imports in __init__.py.
Added the record being processed as a parameter to
handleError (thanks to Gordon den Otter for the idea).
Handler.handle returns the result of applying the
filter to the record (thanks to Gordon den Otter for
the idea).
Added a seek(0, 2) in RotatingFileHandler before the
tell() call. This is because under Windows, tell()
returns 0 until the first actual write (thanks to
Gordon den Otter for the patch).
Altered findCaller to not use inspect (thanks to
Jeremy Hylton for the patch).
Renamed warn and WARN to warning and WARNING. This may
break existing code, but the standard Python module
will use warning/WARNING rather than warn/WARN. The
fatal and FATAL synonyms for critical and CRITICAL
have also been removed.
Added defaultEncoding and some support for encoding
Unicode messages (thanks to Stphane Bidoul for the
suggestion).
Added process ID to the list of LogRecord attributes.
Modified Logger.removeHandler so that it does not
close the handler on removal.
Modified SMTPHandler to treat a single "to address"
correctly (thanks to Anthony Baxter).
Modified SMTPHandler to add a date header to the SMTP
message (thanks to David Driver for the suggestion).
Modified HTTPHandler to factor out the mapping of
a LogRecord to a dictionary (thanks to Franz Glasner
for the patch).
-----------------------------------------------------------------------------
0.4.7 15 Nov 2002 Made into a package with three modules: __init__ (the
core code), handlers (all handlers other than
FileHandler and its bases) and config (all the config
stuff). Before doing this:
Updated docstrings to include a short line, then a
blank line, then more descriptive text.
Renamed 'lvl' to 'level' in various functions.
Changed FileHandler to use "a" and "w" instead of "a+"
and "w+".
Moved log file rotation functionality from FileHandler
to a new class RotatingFileHandler.
Improved docstring describing rollover.
Updated makePickle to use 4-byte length and struct
module, likewise logrecv.py. Also updated on-the-fly
config reader to use 4-byte length/struct module.
Altered ConfigParser test to look at 'readline' rather
than 'read'.
Added optional "defaults" argument to fileConfig, to
be passed to ConfigParser.
Renamed ALL to NOTSET to avoid confusion.
Commented out getRootLogger(), as obsolete.
To do regression testing, run log_test.py and compare
the created files stdout.log and stderr.log against
the files stdout.exp and stderr.exp. They should match
except fir a couple of exception messages which give
absolute file paths.
Updated python_logging.html to remove links to
logging_pydoc.html, which has been removed from the
distribution.
Changed default for raiseExceptions to 1.
-----------------------------------------------------------------------------
0.4.6 08 Jul 2002 Added raiseExceptions to allow conditional propagation
of exceptions which occur during handling.
Added converter to Formatter to allow use of any
function to convert time from seconds to a tuple. It
still defaults to time.localtime but now you can also
use time.gmtime.
Added log_test22.py to test the conversion feature.
Changed rootlogger default level to WARN - was DEBUG.
Updated some docstrings.
Moved import of threading to where thread is imported.
If either is unavailable, threading support is off.
Updated minor defects in python_logging.html.
Check to see if ConfigParser has readfp method; if it
does and an object with a 'read' method is passed in,
assumes a file-like object and uses readfp to read it
in.
-----------------------------------------------------------------------------
0.4.5 04 Jun 2002 Fixed bug which caused problem if no args to message
(suggested by Hye-Shik Chang).
Fixed bug in _fixupParents (thanks to Nicholas Veeser)
and added log_test19.py as a test case for this bug.
Added getMessage to LogRecord (code was moved here from
Formatter.format)
Applied str() to record.msg to allow arbitrary classes
to determine the formatting (as msg can now be a class
instance).
Table of Contents added to python_logging.html, the
section on Loggers updated, and the logconf.ini file
section annotated.
Added log_test20.py which demonstrates how to use
class instances to provide alternatives to numeric
severities as mechanisms for control of logging.
Added log_test21.py which builds on log_test20.py to
show how you can use a regular expression-based Filter
for flexible matching similar to e.g. Protomatter
Syslog, where you can filter on e.g. "a.*" or "*.b" or
"a.*.c".
_levelNames changed to contain reverse mappings as well
as forward mappings (leveltext->level as well as level
-> leveltext). The reverse mappings are used by
fileConfig().
fileConfig() now more forgiving of missing options in
.ini file - sensible defaults now used when some
options are absent. Also, eval() is used less when
interpreting .ini file contents - int() and dict lookup
are used in more places.
-----------------------------------------------------------------------------
0.4.4 02 May 2002 getEffectiveLevel() returns ALL instead of None when
nothing found. Modified references to level=0 to
level=ALL in a couple of places.
SocketHandler now inherits from Handler (it used to
inherit from StreamHandler, for no good reason).
getLock() renamed to createLock().
Docstring tidy-ups, and some tidying up of
DatagramHandler.
Factored out unpickling in logrecv.py.
Added log_test18.py to illustrate MatchFilter, which is
a general matching filter.
Improved FileHandler.doRollover() so that the base
file name is always the most recent, then .1, then .2
etc. up to the maximum backup count. Renamed formal
args and attributes used in rollover.
Changed LogRecord attributes lvl -> levelno, level ->
levelname (less ambiguity)
Formatter.format searches for "%(asctime)" rather than
"(asctime)"
Renamed _start_time to _startTime
Formatter.formatTime now returns the time
Altered logrecv.py to support stopping servers
programmatically
Added log_test.py as overall test harness
basicConfig() can now be safely called more than once
Modified test scripts to make it easier to call them
from log_test.py
Moved SOAPHandler from core to log_test13.py. It's not
general enough to be in the core; most production use
will have differing RPC signatures.
-----------------------------------------------------------------------------
0.4.3 14 Apr 2002 Bug fix one-off error message to go to sys.stderr
rather than sys.stdout.
logrecv.py fix TCP for busy network.
Thread safety - added locking to Handler and for shared
data in module, and log_test16.py to test it.
Added socket listener to allow on-the-fly configuration
and added log_test17.py to test it.
-----------------------------------------------------------------------------
0.4.2 11 Apr 2002 Bug fix fileConfig() - setup of MemoryHandler target
and errors when loggers have no handlers set or
handlers have no formatters set
logconf.py - seems to hang if window closed when combo
dropdown is showing - added code to close popup on exit
Some tweaks to _srcfile computation (normpath added)
findCaller() optimized, now a lot faster!
Logger.removeHandler now closes the handler before
removing it
fileConfig() removes existing handlers before adding
the new set, to avoid memory leakage when repeated
calls are made
Fixed logrecv.py bug which hogged CPU time when TCP
connection was closed from the client
Added log_test14.py to demonstrate/test a DBHandler
which writes logging records into an RDBMS using the
Python Database API 2.0 (to run, you need something
which supports this already installed - I tested with
mxODBC)
Made getLogger name argument optional - returns root
logger if omitted
Altered Filter to take a string initializer, filtering
a sub-hierarchy rooted at a particular point (idea from
Denis S. Otkidach).
Added log_test15.py to test Filter initializer
Minor docstring changes
-----------------------------------------------------------------------------
0.4.1 03 Apr 2002 Bug fix SMTPHandler - extra \r\n needed (Oleg Orlov)
Added BufferingHandler, BufferingFormatter
Renamed getChainedPriority to getEffectiveLevel
Removed Logger.getRoot as it is redundant
Added log_test9.py to test Buffering classes and
to show an XMLFormatter example.
Added setLoggerClass.
Added log_test10.py to test setLoggerClass, using an
example Logger-derived class which outputs exception
info even for DEBUG level logging calls
Added log_test11.py to test a buffering implementation
of SMTPHandler
Changed logging call implementation to allow keyword
arguments (Kevin Butler and others)
Changed default SysLogHandler implementation.
Renamed "additive" to "propagate" as it better
describes the attribute.
Added HTTPHandler.
Modified logrecv.py to remove "both" option and to add
"HTTP" and "SOAP" options (SOAP option needs you to
have PyXML-0.6.6 and ZSI installed - for logrecv.py
only, and not for the core logging module itself).
Added log_test12.py to test HTTPHandler.
Added log_test13.py to test SOAPHandler.
Formatted to Python source guidelines (spaces, indent
of 4, within 80 columns).
More method renamings (result of feedback) - _handle()
renamed to emit(), _logRecord() renamed to handle().
Renamed FATAL to CRITICAL (David Goodger), but left
fatal() and FATAL in (until PEP is changed)
Changed configuration file format to ConfigParser
format.
Factored filter application functionality out to a new
Filterer class. The isLoggable() method is renamed to
filter() in both Filter and Filterer classes.
Altered SMTPHandler __init__ to accept (host, port)
for the mail internet address.
Added GUI configurator which uses Tkinter and the new
configuration file format. (See logconf.py and an
example configuration file in logconf.ini)
Altered log_test3.py to test with the new file format.
-----------------------------------------------------------------------------
0.4 21 Mar 2002 Incorporated comments/patches from Ollie Rutherfurd:
-Added level filtering for handlers.
-Return root logger if no name specified in getLogger.
Incorporated comments from Greg Ward:
-Added distutils setup.py script.
Added formatter initialization in Handler.__init__.
Tidied up docstrings.
Added removeHandler to Logger.
Added removeFilter to Logger and Handler.
logrecv.py modified to keep connection alive until
client closes it.
SocketHandler modified to not reset connection after
each logging event.
Added shutdown function which closes open sockets
Renamed DEFAULT_LOGGING_PORT->DEFAULT_TCP_LOGGING_PORT
Added DEFAULT_UDP_LOGGING_PORT
Added log_test4.py (example of arbitrary levels)
Added addLevelName, changed behaviour of getLevelName
Fixed bugs in DatagramHandler
Added SMTPHandler implementation
Added log_test5.py to test SMTPHandler
Added SysLogHandler (contribution from Nicolas Untz
based on Sam Rushing's syslog.py)
Modified log_test1.py to add a SysLogHandler
Added rollover functionality to FileHandler
Added NTEventLogHandler (based on Win32 extensions)
Added MemoryHandler implementation
Added log_test7.py to test MemoryHandler
Added log_test8.py to test FileHandler rollover
Added logException method to Logger
Added formatException method to Formatter
Added log_test6.py to test NTEventHandler and
logException
Numerous internal method renamings (sorry - but better
to do this now, rather than when we enter beta status).
-----------------------------------------------------------------------------
0.3 14 Mar 2002 First public release, for early feedback
-----------------------------------------------------------------------------
0.2 Consolidated into single file (for internal use only)
-----------------------------------------------------------------------------
0.1 Initial implementation (for internal use only)
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
COPYRIGHT
-----------------------------------------------------------------------------
Copyright 2001-2002 by Vinay Sajip. All Rights Reserved.
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Vinay Sajip
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.
VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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