[Solved] What is the issue with this code snippet?import csv with open('data.csv', 'w', newline='') as f: writer = csv.DictWriter(f, fieldnames=['name', 'age']) writer.writerow({'name': 'John', 'age':... | Python

Python - Structured Data Files

What is the issue with this code snippet?

import csv
with open('data.csv', 'w', newline='') as f:
    writer = csv.DictWriter(f, fieldnames=['name', 'age'])
    writer.writerow({'name': 'John', 'age': 28})
    writer.writeheader()

Awriteheader() should be called before writing rows

BMissing import statement for csv module

CThe file should be opened in read mode

Dfieldnames list is missing required columns

Step-by-Step Solution

Solution:

Step 1: Check order of method calls
writeheader() writes the header row and should be called before any writerow() calls.
Step 2: Identify the error
In the snippet, writerow() is called before writeheader(), so the header is missing or misplaced.
Final Answer:
writeheader() should be called before writing rows -> Option A
Quick Check:
Header must be written before rows [OK]

Quick Trick: Call writeheader() before writerow() [OK]

Common Mistakes:

Calling writeheader() after writing rows
Forgetting to specify fieldnames
Not using newline='' when opening file

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What is the issue with this code snippet?

Step 1: Check order of method calls

Step 2: Identify the error

Final Answer:

Quick Check:

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