The @abstractmethod Decorator

Medium Abstraction & Interfaces

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Problem Statement

Update `Shape` (inheriting from `abc.ABC`) to include a method `area(self)` decorated with `@abc.abstractmethod`. Try to instantiate `Shape` in a try-except block. Catch the `TypeError` and print ‘Cannot instantiate abstract class’.

Input Format

None

Output Format

Print the exact error message.

Constraints

None

Sample Output

Cannot instantiate abstract class

Explanation

Adding an @abstractmethod explicitly forbids the direct instantiation of the base class.

Starter Code

import abc

class Shape(abc.ABC):
    # Define the abstract method 'area' here
    pass

if __name__ == '__main__':
    # Use try-except to catch instantiation error
    pass

Limits

Time Limit: 1s
Memory Limit: 256MB

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