Closes #12206: documentation update for LogRecord constructor and Formatter.formatTime.

Doc/library/logging.rst

@@ -416,6 +416,13 @@ The useful mapping keys in a :class:`LogRecord` are given in the section on
       record. Otherwise, the ISO8601 format is used.  The resulting string is
       returned.
 
+      This function uses a user-configurable function to convert the creation
+      time to a tuple. By default, :func:`time.localtime` is used; to change
+      this for a particular formatter instance, set the ``converter`` attribute
+      to a function with the same signature as :func:`time.localtime` or
+      :func:`time.gmtime`. To change it for all formatters, for example if you
+      want all logging times to be shown in GMT, set the ``converter``
+      attribute in the ``Formatter`` class.
 
    .. method:: formatException(exc_info)
 
@@ -491,6 +498,9 @@ wire).
    :param name:  The name of the logger used to log the event represented by
                  this LogRecord.
    :param level: The numeric level of the logging event (one of DEBUG, INFO etc.)
+                 Note that this is converted to *two* attributes of the LogRecord:
+                 ``levelno`` for the numeric value and ``levelname`` for the
+                 corresponding level name.
    :param pathname: The full pathname of the source file where the logging call
                     was made.
    :param lineno: The line number in the source file where the logging call was