search a pattern in file using Python

 import re

pattern = re.compile("ORA-")

for line in open("x2.txt"):

    for match in re.finditer(pattern, line):

        print(line)

date time in python

#!/usr/bin/env python

import io
import datetime
import traceback

AlertLogFile=r'test.dat'
EventDate=datetime.datetime(1, 1, 1, 0, 0)
OutputList=[]

try:
    with io.open(AlertLogFile,mode='r') as f:
        for line in f:
          EventDate=datetime.datetime.strptime(line.rstrip('\n'), '%Y-%m-%d %H:%M:%S')
          # EventDate=datetime.datetime.strptime(line.rstrip('\n'), '%a %b %d %H:%M:%S %Y')
          # OutputList.append([EventDate,line.rstrip('\n')])
          OutputList.append([EventDate,line.rstrip('\n')])
except:
    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]))
    # print('[%s]' % (o[0]))



Data
oracle@lnx21426> cat test.dat
2016-11-03 12:01:13
2017-04-05 12:03:28
oracle@lnx21426>

python program to check ocssd.log for error/issue/node eviction etc in last 48 hours

# python program to check ocssd.log for error/issue/node eviction etc

#!/usr/bin/env python

import io
import datetime
import traceback

DayList=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
KeyWordList=['ORA-','Error','CRS-1013','Polling','Diskpingout']
# KeyWordList=['ORA-','Error','Starting ORACLE instance','Shutting down instance']
OutputList=[]

# customize to check last 48 hours in this case
SkipOldEventHours=48

# name and location of ocssd file . it has changed in 12c
AlertLogFile=r'/ora01/grid/11.2.0.4/grid/log/`hostname`/cssd/ocssd.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:
                for w in KeyWordList:
                    if w in line:
                        OutputList.append([EventDate,line.rstrip('\n')])
except:
    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]))

# the end

python program to check ocssd.log in oracle 11g for node eviction / issues

# python program to check ocssd.log in oracle 11g for node eviction / issues

# customize name/location of ocssd file: it has changed in 12g
infile = r'/ora01/grid/11.2.0.4/grid/log/`hostname`/cssd/ocssd.log'

important = []
keep_phrases = ["Diskpingout",
              "CRS-1013",
              "Polling"]

with open(infile) as f:
    f = f.readlines()

for line in f:
    for phrase in keep_phrases:
        if phrase in line:
            # important.append(line.rstrip('\n'))
            important.append([line.rstrip('\n')])
# OutputList.append([EventDate,line.rstrip('\n')])
            break

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

python program to check oracle alert log file for error in past 48 hours

# python program to check oracle alert log file for error in past 48 hours

#!/usr/bin/env python

import io
import datetime
import traceback

DayList=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
KeyWordList=['ORA-','Error','alter']
# KeyWordList=['ORA-','Error','Starting ORACLE instance','Shutting down instance']
OutputList=[]

# customize hours to look for 
SkipOldEventHours=48

# customize name of alert.log
AlertLogFile=r'alert_cisdbc.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:
                continue
except:
    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]))

# the end