[Solved] What will be the output of this code snippet?import csv with open('data.csv', 'w', newline='') as f: writer = csv.writer(f) writer.writerow(['Name', 'Age']) writer.... | Python

Python - Structured Data Files

What will be the output of this code snippet?

import csv
with open('data.csv', 'w', newline='') as f:
    writer = csv.writer(f)
    writer.writerow(['Name', 'Age'])
    writer.writerow(['Alice', '30'])

with open('data.csv', 'r') as f:
    reader = csv.reader(f)
    rows = list(reader)
print(rows)

A['Name', 'Age', 'Alice', '30']

BSyntaxError

C[['Name, Age'], ['Alice, 30']]

D[['Name', 'Age'], ['Alice', '30']]

Step-by-Step Solution

Solution:

Step 1: Writing rows with csv.writer
The code writes two rows: header ['Name', 'Age'] and data ['Alice', '30'] as lists.
Step 2: Reading rows with csv.reader
Reading back returns a list of lists, each inner list is a row split by commas.
Final Answer:
[['Name', 'Age'], ['Alice', '30']] -> Option D
Quick Check:
csv.reader returns list of lists [OK]

Quick Trick: csv.reader returns list of lists, not flat list [OK]

Common Mistakes:

MISTAKES

Expecting a flat list instead of list of lists
Thinking rows are single strings
Syntax errors from missing newline='' in open

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What will be the output of this code snippet?

Step 1: Writing rows with csv.writer

Step 2: Reading rows with csv.reader

Final Answer:

Quick Check:

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