129 lines
2.6 KiB
Python
129 lines
2.6 KiB
Python
"""
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Created on Nov 23, 2016
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@author: Arthur
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"""
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class Shape:
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def __init__(self, color):
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# print("building a shape")
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self._color = color
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@property
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def color(self):
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return self._color
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@color.setter
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def color(self, new_color):
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self._color = new_color
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@property
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def area(self):
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return 0
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def __str__(self):
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return "a " + self.color + " shape"
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class Rectangle(Shape):
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def __init__(self, width, height, color):
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Shape.__init__(self, color)
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# print("building a rectangle")
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self._width = width
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self._height = height
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@property
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def width(self):
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return self._width
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@property
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def height(self):
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return self._height
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@property
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def area(self):
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return self._width * self._height
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def __str__(self):
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return "a " + self.color + " rectangle"
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class Square(Rectangle):
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def __init__(self, side, color):
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# print("building a square")
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Rectangle.__init__(self, side, side, color)
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@property
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def side(self):
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return self._width
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def __str__(self):
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return "a " + self.color + " square"
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class Ellipse(Shape):
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def __init__(self, major, minor, color):
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Shape.__init__(self, color)
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# print("building an ellipse")
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self._major = major
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self._minor = minor
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@property
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def major(self):
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return self._major
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@property
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def minor(self):
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return self._minor
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@property
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def area(self):
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return 3.14 * self._minor * self._major
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def __str__(self):
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return "a " + self.color + " ellipse"
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class Circle(Ellipse):
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def __init__(self, radius, color):
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Ellipse.__init__(self, radius, radius, color)
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# print("building a circle")
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@property
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def radius(self):
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return self.major
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@property
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def area(self):
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return 3.14 * self.radius ** 2
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def __str__(self):
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return "a " + self.color + " circle"
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if __name__ == "__main__":
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shape = Shape("red")
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print(str(shape) + ", area is = " + str(shape.area))
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"""
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The rectangle 'is a' shape
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"""
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rectangle = Rectangle(5, 2, "blue")
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print(str(rectangle) + ", area is = " + str(rectangle.area))
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"""
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The square 'is a' particular rectangle
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"""
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square = Square(3, "green")
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print(str(square) + ", area is =" + str(square.area))
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ellipse = Ellipse(10, 6, "pink")
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print(str(ellipse) + ", area is =" + str(ellipse.area))
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"""
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The circle 'is a' particular ellipse
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"""
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circle = Circle(8, "magenta")
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print(str(circle) + ", area is =" + str(circle.area))
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