LogRecord instances are created every time something is logged. They
contain all the information pertinent to the event being logged. The
main information passed in is in msg and args, which are combined
using msg % args to create the message field of the record. The record
also includes information such as when the record was created, the
source line where the logging call was made, and any exception
information to be logged.
||name, lvl, pathname, lineno, msg, args,
Returns an instance of LogRecord initialized with interesting
information. The name is the logger name; lvl is the
numeric level; pathname is the absolute pathname of the source
file in which the logging call was made; lineno is the line
number in that file where the logging call is found; msg is the
user-supplied message (a format string); args is the tuple
which, together with msg, makes up the user message; and
exc_info is the exception tuple obtained by calling
sys.exc_info() (or None, if no exception information
Returns the message for this LogRecord instance after merging any
user-supplied arguments with the message.
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