The constructor sets this attribute to ``True``.
- .. note:: If you attach a handler to several loggers, it may emit the same
- record multiple times. In general, you should not need to attach a
- handler to more than one logger - if you just attach it to the
- appropriate logger which is highest in the logger hierarchy, then it
- will see all events logged by all descendant loggers, provided that
- their propagate setting is left set to ``True``. A common scenario is to
- attach handlers only to the root logger, and let propagation take care of
- the rest.
+ .. note:: If you attach a handler to a logger *and* one or more of its
+ ancestors, it may emit the same record multiple times. In general, you
+ should not need to attach a handler to more than one logger - if you just
+ attach it to the appropriate logger which is highest in the logger
+ hierarchy, then it will see all events logged by all descendant loggers,
+ provided that their propagate setting is left set to ``True``. A common
+ scenario is to attach handlers only to the root logger, and to let
+ propagation take care of the rest.
.. method:: Logger.setLevel(lvl)