#0164

CSV Totals by Category

MediumPython25 min20 XP

Problem

Given CSV text with columns category and amount, return a dictionary mapping each category to its total amount.

Why This Matters

Small CSV aggregation scripts are common in operations, analytics, and interview take-home tasks.

Function Signature

def totals_by_category(csv_text):

Examples

Example 1

Input"category,amount\nbook,10\nfood,5\nbook,7"

Output{'book': 17.0, 'food': 5.0}

The two book rows are added together.

Constraints

Return the exact requested output.
Handle ordinary edge cases.
Prefer simple, interview-readable code.

CodePython

def totals_by_category(csv_text):
    """
    Input example: "category,amount\nbook,10\nfood,5\nbook,7"
    Return: {'book': 17.0, 'food': 5.0}
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return {}

def totals_by_category(csv_text):
    """
    Input example: "category,amount\nbook,10\nfood,5\nbook,7"
    Return: {'book': 17.0, 'food': 5.0}
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return {}

Visible browser tests run here when available.

Testcases1 visible / 3 hidden categories

Core example

Input"category,amount\nbook,10\nfood,5\nbook,7"

Expected{'book': 17.0, 'food': 5.0}

The two book rows are added together.

Hidden Test Categories

empty or minimal inputduplicates or tieslarger input