def birthday(self):
if isfile(self.pid_file):<EOL><INDENT>tstamp  = datetime.fromtimestamp(self.created())<EOL>tzone   = tzname[<NUM_LIT:0>] <EOL>weekday = WEEKDAY[tstamp.isoweekday()]<EOL>age     = self.age()<EOL>age_str = '<STR_LIT>'.format(age[<NUM_LIT:0>]) <EOL>bday   = '<STR_LIT>'.format(weekday, tstamp, tzone, age_str)<EOL>return (self.created(), bday)<EOL><DEDENT>return (None, None)<EOL>
Return a string representing the age of the process.