4-square.py

#!/usr/bin/python3
"""class Square that defines a square"""


class Square():
    """Implementing the square class"""

    def __init__(self, size=0):
        self.__size = size

    @property
    def size(self):
        """Get the value of size
        Args:
            None
        Returns:
            __size
        """
        return self.__size

    @size.setter
    def size(self, value):
        """Set the value of the square
        Args:
            value (int)
        Returns:
            None
        """
        if (not isinstance(value, int)):
            raise TypeError("size must be an integer")
        elif (value < 0):
            raise ValueError("size must be >= 0")
        self.__size = value

    def area(self):
        """Compute and Return area
        Args:
            None
        Returns
            __size x 4
        """
        return self.__size ** 2