Python Coding challenge - Day 449| What is the output of the following Python Code?

 

Code Explanation:

 Importing Modules

import csv

from io import StringIO

Explanation:

csv is Python’s built-in module to read/write CSV files.

StringIO lets us treat a string like a file (needed because csv expects a file-like object).

Creating CSV Data

python

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Edit

data = "a,b\n1,2\n3,4"

Explanation:

A string representing CSV content:

a,b      ← header row

1,2      ← first data row

3,4      ← second data row

Reading CSV with DictReader

reader = csv.DictReader(StringIO(data))

Explanation:

Wraps the string in StringIO to act like a file.

csv.DictReader reads each row as a dictionary using the first row as keys.

Example:

next(reader)  ➞ {'a': '1', 'b': '2'}

Getting a Field Value

print(next(reader)['b'])

Explanation:

next(reader) gets the first data row: {'a': '1', 'b': '2'}

['b'] accesses the value for column 'b', which is '2'.

So it prints:

2

Final Output:

2