Made func argument in LogRecord.__init__ optional.
Improved performance of _fixupChildren.

Made SysLogHandler more resilient in the face of syslogd failures.

 (backport from rev. 51785)

already been cleaned up.

Addressed SF#1524081 by using a dictionary to map level names to syslog priority names, rather than a string.lower().

Removed buggy exception handling in doRollover of rotating file handlers. Exceptions now propagate to caller.

Changed status from "beta" to "production"; since logging has been part of the stdlib since 2.3, it should be safe to make this assertion ;-)

Replaced my dumb way of calculating seconds to midnight with Tim Peters' much more sensible suggestion. What was I thinking ?!?

StreamHandler now checks explicitly for None before using sys.stderr as the stream (see SF bug #1463840).

Catch situations where currentframe() returns None. See SF patch #1447410, this is a different implementation.

Added 'extra' keyword argument handling to logging calls, as discussed on python-dev.

Not sure why/how _handlers/_handlerList is out of sync.  This could
indicate a deeper problem.

In test_logging, the only absolutely necessary change to get working
was tcpserver.abort = 1.  But we don't want to wait infinitely
to join the threads, so give a 2.0 second timeout.

There doesn't appear to be a need for a local abort variable
in serve_until_stopped, so just use the instance member.

Note the problem is only on HEAD, not in 2.4.

Added the ability to specify a class attribute in Formatter configuration. Contributed by Shane Hathaway.

Exceptions raised during renaming in rotating file handlers are now passed to handleError (except for SystemExit and KeyboardInterrupt, which are re-raised).

Exceptions raised during renaming in rotating file handlers are now passed to handleError (except for SystemExit and KeyboardInterrupt, which are re-raised).

TimedRotatingFileHandler now calculates next rollover from previous rollover rather than current time.

Fixed indentation bug in _connect_unixsocket (thanks to Ken Lalonde for reporting it/supplying a patch)

Optimised Placeholders handling of child loggers by using a dict rather than a list (much slower in the pathological case of hundreds of child Loggers to a Placeholder - problem reported by Ryan Blazecka).

Added _handlerList to allow shutdown to flush and close handlers in reverse order of creation (see SF# 1282539)

Made traceback unconditional, to avoid lock contention problems when logging errors occur in a custom importer (SF path #1158052).