Calculator

• Create domain/models.py file for domain modeling.

• Create an Operands class with first_operand and second_operand class fields.

• Both fields must be int type.

• Do not forget to implement unit tests for Operands class, use pytest for tests

• Create function called operands_factory with first_operand and second_operand arguments.

• Function must be located in domain/models.py.

• Both arguments must be int type.

• Factory should return the Operands class object.

• Factory return type must be Operands as well.

• Do not forget to implement unit tests for operands_factory function, use pytest for tests

• Create service/calculator.py where you need to put your service logic.

• Create class Calculator with add(), subtract(), multiply(), and divide() methods.

• Don't use use @staticmethod or @classmethod, just pure class methods.

• All class methods must return int type.

• Each function will accept a single argument called operands of type Operands.

• For eg, add functionality is operands.first_operand + operands.second_operand.

• Do not forget to implement unit tests for each method, use pytest for tests

• To finalize the project, we need an entry point.

• Create entrypoints/cli/main.py file

• Implement main() function to get input values for first_operand, second_operand and action from user

• Please remember that getting input and calculations must happen inside the main() function. This is an all-in-one function.

• Use these values to construct the functionality of the main function. For example, if Inputs were 45, 35, add, the User wants to sum 45 and 35.

• Call the respective service Calculator method for each action.

Do not forget to implement integration tests for each action for the main function, use pytest for tests