
"""This is demo module.

It contains a lof useful functions.
Here you can find a class `MyClass`.
"""

class MyClass:

    @staticmethod
    def sum(a, b):
        """Sum the values of two numbers.

        Args:
            a (int): number 1
            b (int): number 2

        Returns:
            This is a description of what is returned.

        Raises:
            KeyError: Raises an exception.
        """
        return a + b
