Coursera Using Python to Interact with the Operating System - Week 7 Solved | Google IT Auto | 2020
#!/usr/bin/env python3
import re
import sys
import operator
import csv
users={}
errors={}
f=open("syslog.log")
for line in f:
line=line.strip()
usrname=(re.search(r"\((.*)\)",line)).group(1)
msg=(re.search(r"(ERROR|INFO)",line)).group(1)
if (usrname not in users):
user_count = {'INFO': 0, 'ERROR': 0}
users[usrname] = user_count
users[usrname][msg]+=1
if msg=="ERROR":
err=(re.search(r"ERROR (.*) ",line)).group(1)
if (err not in errors):
errors[err]=0
errors[err]+=1
f.close()
users2=[]
errors2=[]
for key in sorted(users.keys()):
users2.append([key,users[key]["INFO"],users[key]["ERROR"]])
for key, value in sorted(errors.items(), key=lambda item: item[1],reverse=True):
errors2.append([key, value])
users2.insert(0,["Username","INFO","ERROR"])
errors2.insert(0,["Error","Count"])
fe=open("error_message.csv","w")
fu=open("user_statistics.csv","w")
writer1=csv.writer(fe)
writer2=csv.writer(fu)
writer1.writerows(errors2)
writer2.writerows(users2)
fe.close()
fu.close()
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