Given a dictionary d = {'a': [1,2], 'b': [3,4,5]}, how do you find the total number of values across all keys?

hard🚀 Application Q9 of Q15

Python - Magic Methods and Operator Overloading

Given a dictionary d = {'a': [1,2], 'b': [3,4,5]}, how do you find the total number of values across all keys?

Asum(len(v) for v in d.values())

Blen(d)

Clen(d.values())

Dsum(d.keys())

Step-by-Step Solution

Solution:

Step 1: Understand dictionary values
Each key maps to a list of values. We want total count of all values in all lists.
Step 2: Sum lengths of all value lists
Use sum(len(v) for v in d.values()) to add lengths of each list: 2 + 3 = 5.
Final Answer:
sum(len(v) for v in d.values()) -> Option A
Quick Check:
Total values in dict = sum of lengths of value lists [OK]

Quick Trick: Sum lengths of dict values to count all items [OK]

Common Mistakes:

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