python intermediate Ends 2026-11-17

Parse a log file

Given lines from a web server access log, write summarise(lines) that returns a dict with:

  • "requests": number of valid lines
  • "errors": number of responses with status 500 or above
  • "top_path": the most requested path (ties: alphabetically first)
  • "bad_lines": number of lines that don't match the format

Line format: IP - - [time] "METHOD /path HTTP/1.1" STATUS BYTES

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