Parse Logs for Top Offenders | Dataford Interview Questions

Write a script to parse log files and identify the top 10 IP addresses making failed requests.

Implement top_failed_ips(log_lines). Each line uses combined-log format: IP - - [timestamp] "METHOD path protocol" STATUS bytes; status codes from 400 through 599 are failures. Return up to 10 [ip, count] pairs, ordered by descending failure count and then ascending IP address. Inputs contain valid log lines.

Constraints

0 <= len(log_lines) <= 500
Each log line follows the specified combined-log format
An IP address is a valid IPv4 or IPv6 string
Failed status codes are integers from 400 through 599
Return no more than 10 addresses

Function Signature

def top_failed_ips(log_lines):

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Problem

Write a script to parse log files and identify the top 10 IP addresses making failed requests.

Constraints

0 <= len(log_lines) <= 500
Each log line follows the specified combined-log format
An IP address is a valid IPv4 or IPv6 string
Failed status codes are integers from 400 through 599
Return no more than 10 addresses

Function Signature

def top_failed_ips(log_lines):

Your question is Parse Logs for Top Offenders. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.