Use Python to format Oracle alert log based on keywords and time range

# Author: Donghua# Purpose: Filter key messages in Oracle alert log for last 48 hoursimport io
import datetime
import traceback

DayList=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
KeyWordList=['ORA-','Error','Starting ORACLE instance','Shutting down instance']
OutputList=[]
SkipOldEventHours=48AlertLogFile=r'D:\oracle\diag\rdbms\orcl\orcl\trace\alert_orcl.log'
SkipOldEventDateTimeDelta=datetime.timedelta(hours=SkipOldEventHours)
EventDate=datetime.datetime(1, 1, 1, 0, 0)

try:
    with io.open(AlertLogFile,mode='r') as f:
        for line in f:
           if len(line)>3 and line[0:3] in DayList:
                # OutputList.append(line)                EventDate=datetime.datetime.strptime(line.rstrip('\n'), '%a %b %d %H:%M:%S %Y')
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue           elif len(line)>3:
                if EventDate < datetime.datetime.now()-SkipOldEventDateTimeDelta :
                    continue                for w in KeyWordList:
                    if w in line:
                        OutputList.append([EventDate,line.rstrip('\n')])
           else:
                continueexcept:
    print(traceback.format_exc())

for o in OutputList:
    # use o[0].strftime('%a %b %d %H:%M:%S %Y') to get original Oracle style Format    print('[%s] %s' % (o[0], o[1]))