You want to read a file and create a list of all non-empty lines without newline characters. Which code correctly does this?

hard📝 Application Q15 of 15

Python - File Handling Fundamentals

Awith open('log.txt', 'r') as f: lines = [line.strip() for line in f if line.strip()]

Bwith open('log.txt', 'r') as f: lines = [line for line in f.readlines() if line != '\n']

Cwith open('log.txt', 'r') as f: lines = f.read().split('\n')

Dwith open('log.txt', 'r') as f: lines = [line.rstrip('\n') for line in f.readlines()]

Step-by-Step Solution

Solution:

Step 1: Remove whitespace and filter empty lines
Using line.strip() removes spaces and newline characters from both ends. The condition if line.strip() filters out empty lines.
Step 2: Use list comprehension on file object
Iterating directly on the file object reads line by line efficiently. This creates a list of cleaned, non-empty lines.
Final Answer:
with open('log.txt', 'r') as f: lines = [line.strip() for line in f if line.strip()] -> Option A
Quick Check:
strip() + filter empty lines = clean list [OK]

Quick Trick: Use strip() and filter with if line.strip() in comprehension [OK]

Common Mistakes:

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