[Solved] What will be the output of this code snippet?import csv from io import StringIO csv_content = 'name,age\nAlice,30\nBob,25' file = StringIO(csv_content) reader = csv.... | Python

Python - Structured Data Files

What will be the output of this code snippet?

import csv
from io import StringIO

csv_content = 'name,age\nAlice,30\nBob,25'
file = StringIO(csv_content)
reader = csv.DictReader(file)
for row in reader:
    print(row['age'])

AAlice\nBob

B30\n25

Cname\nage

DError: KeyError

Step-by-Step Solution

Solution:

Step 1: Understand the CSV content and DictReader usage
The CSV has headers 'name' and 'age', with two rows: Alice 30, Bob 25.
Step 2: Loop prints the 'age' value from each row dictionary
It prints '30' then '25' on separate lines.
Final Answer:
30\n25 -> Option B
Quick Check:
DictReader row['age'] prints ages 30 and 25 [OK]

Quick Trick: DictReader keys are headers; access values by column name [OK]

Common Mistakes:

Printing keys instead of values
Expecting names instead of ages
Confusing header row as data

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What will be the output of this code snippet?

Step 1: Understand the CSV content and DictReader usage

Step 2: Loop prints the 'age' value from each row dictionary

Final Answer:

Quick Check:

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