Class Decorators

Hard Design Patterns & Final Challenges PRO

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Problem Statement

Create a class decorator `@add_repr` that dynamically injects a `__repr__` method into a class, returning the string ‘Class: [ClassName]’. Apply it to a newly defined `TestModule` class. Instantiate it and print using `repr()`.

Input Format

None

Output Format

Print the injected representation.

Constraints

None

Sample Output

Class: TestModule

Explanation

Class decorators operate on entire classes instead of functions, allowing powerful metaprogramming and dynamic attribute injection.

Starter Code

def add_repr(cls):
    # Inject __repr__ here
    pass

# @add_repr
class TestModule:
    pass

if __name__ == '__main__':
    # Instantiate and print representation
    pass

Limits

Time Limit: 1s
Memory Limit: 256MB

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