Interface using ABC: Strict contracts

Medium Abstraction & Interfaces

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Problem Statement

Python does not have a strict `interface` keyword. Emulate one by creating an `IDataSource` ABC where *every* method (`connect`, `read`, `disconnect`) is abstract. Implement a `SQLDatabase` class fulfilling the contract. Print ‘SQL Connected’ in the connect method.

Input Format

None

Output Format

Print 'SQL Connected'.

Constraints

None

Sample Output

SQL Connected

Explanation

An interface is purely a contract defining what a class must do, containing absolutely zero concrete implementation.

Starter Code

import abc

class IDataSource(abc.ABC):
    # Define abstract connect, read, and disconnect
    pass

class SQLDatabase(IDataSource):
    # Implement the interface
    pass

if __name__ == '__main__':
    db = SQLDatabase()
    db.connect()

Limits

Time Limit: 1s
Memory Limit: 256MB

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