On Apr 18, 10:11 pm, Disc Magnet <discmag...@gmail.com> wrote: > Could you please help me understand this difference? Programs and > log.conf file follow:
The first program prints two messages because loggers pass events to handlers attached to themselves and their ancestors. Hence, logger1's message is printed by logger1's handler, and logger2's message is printed by logger1's handler because it is an ancestor of logger2. In the second case, logger foo.bar exists when fileConfig() is called, but it is not named explicitly in the configuration. Hence, it is disabled (as documented). Hence only logger1's message is printed. NullHandler is a handler which does nothing - there is no point in adding it to a system which configures logging, and only any point in adding it to top-level loggers of libraries which may be used when logging is configured (also documented). Regards, Vinay Sajip Regards, Vinay Sajip -- http://mail.python.org/mailman/listinfo/python-list
