[Solved] What will be the output of this code snippet? with open('data.txt', 'r') as f: lines = [] for _ in range(3): lines.append(f.readline().strip()) print(lines) | Python

Python - File Reading and Writing Strategies

What will be the output of this code snippet?

with open('data.txt', 'r') as f:
    lines = []
    for _ in range(3):
        lines.append(f.readline().strip())
print(lines)

AA list of the entire file lines

BA syntax error due to missing colon

CAn empty list

DA list of the first 3 lines without newline characters

Step-by-Step Solution

Solution:

Step 1: Understand readline() and loop
The loop runs 3 times, each time reading one line and stripping whitespace.
Step 2: Collect lines in list and print
After 3 iterations, lines contains first 3 lines without newline characters.
Final Answer:
A list of the first 3 lines without newline characters -> Option D
Quick Check:
Partial file read lines = B [OK]

Quick Trick: readline() reads one line; strip() removes newlines [OK]

Common Mistakes:

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