// code challenge

Count non-empty lines

~15 min

SRE-flavored warm-up: count log lines that are not blank.

Read all of stdin. Print the number of lines that contain at least one non-whitespace character.

Example: stdin: error: timeout <blank> ok stdout: 2

Useful when skimming logs and metrics dumps.

Language: · Judge0

// sample tests

stdin "a\nb\nc\n" → stdout "3"
stdin "x\n\ny\n" → stdout "2"
stdin "\n\n" → stdout "0"

import sys
# Read all of stdin, count non-empty lines
text = sys.stdin.read()
lines = [ln for ln in text.splitlines() if ln.strip()]
print(len(lines))