How can you create a class attribute that holds a dictionary mapping names to ages, and update it when creating new instances?

hard📝 Application Q9 of 15

Python - Classes and Object Lifecycle

Aclass Person: ages = {} def __init__(self, name, age): Person.ages[name] = age

Bclass Person: ages = {} def __init__(self, name, age): self.ages = {name: age}

Cclass Person: def __init__(self, name, age): ages = {} ages[name] = age

Dclass Person: def __init__(self, name, age): self.ages = {} self.ages[name] = age

Step-by-Step Solution

Solution:

Step 1: Define class attribute dictionary
Define ages = {} inside class body to share among all instances.
Step 2: Check each option
class Person: ages = {} def __init__(self, name, age): Person.ages[name] = age correctly updates Person.ages. class Person: ages = {} def __init__(self, name, age): self.ages = {name: age} creates an instance attribute, others fail to share.
Final Answer:
class Person:\n ages = {}\n def __init__(self, name, age):\n Person.ages[name] = age -> Option A
Quick Check:
Update class dict attribute via ClassName.attribute inside methods [OK]

Quick Trick: Modify class dict attribute using ClassName.attribute inside __init__ [OK]

Common Mistakes:

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