3-square.py

#!/usr/bin/python3

"""
Module defines Square class that initializes square of given size.
"""


class Square:
    """
    Square class. Class is used to create square of given size.

    Attributes:
        __size (int): Size of square, defaults to 0.
    """

    def __init__(self, size=0):
        """
        Constructor of Square class.

        Args:
            size (int, optional): Size of square to be created. Defaults to 0.

        Raises:
            TypeError: If size is not an integer.
            ValueError: If size is less than 0.
        """
        if not isinstance(size, int):
            # Check if size is an integer.
            raise TypeError("size must be an integer")
        if size < 0:
            # Check if size is greater than or equal to 0.
            raise ValueError("size must be >= 0")
        self.__size = size
        # Set size of square.

    def area(self):
        """
        Calculate and return the area of the square.

        Returns:
            int: The area of the square.
        """
        # Calculate and return area of square.
        return self.__size * self.__size