75 lines
1.8 KiB
Python
75 lines
1.8 KiB
Python
# oop/multiple.inheritance.py
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class Shape:
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geometric_type = 'Generic Shape'
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def area(self): # This acts as placeholder for the interface
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raise NotImplementedError
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def get_geometric_type(self):
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return self.geometric_type
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class Plotter:
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def plot(self, ratio, topleft):
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# Imagine some nice plotting logic here...
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print('Plotting at {}, ratio {}.'.format(
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topleft, ratio))
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class Polygon(Shape, Plotter): # base class for polygons
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geometric_type = 'Polygon'
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class RegularPolygon(Polygon): # Is-A Polygon
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geometric_type = 'Regular Polygon'
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def __init__(self, side):
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self.side = side
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class RegularHexagon(RegularPolygon): # Is-A RegularPolygon
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geometric_type = 'RegularHexagon'
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def area(self):
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return 1.5 * (3 ** .5 * self.side ** 2)
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class Square(RegularPolygon): # Is-A RegularPolygon
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geometric_type = 'Square'
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def area(self):
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return self.side * self.side
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hexagon = RegularHexagon(10)
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print(hexagon.area()) # 259.8076211353316
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print(hexagon.get_geometric_type()) # RegularHexagon
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hexagon.plot(0.8, (75, 77)) # Plotting at (75, 77), ratio 0.8.
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square = Square(12)
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print(square.area()) # 144
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print(square.get_geometric_type()) # Square
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square.plot(0.93, (74, 75)) # Plotting at (74, 75), ratio 0.93.
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print(square.__class__.__mro__)
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# prints:
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# (<class '__main__.Square'>, <class '__main__.RegularPolygon'>,
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# <class '__main__.Polygon'>, <class '__main__.Shape'>,
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# <class '__main__.Plotter'>, <class 'object'>)
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"""
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$ python multiple.inheritance.py
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259.8076211353316
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RegularHexagon
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Plotting at (75, 77), ratio 0.8.
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144
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Square
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Plotting at (74, 75), ratio 0.93.
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(
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<class '__main__.Square'>, <class '__main__.RegularPolygon'>,
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<class '__main__.Polygon'>, <class '__main__.Shape'>,
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<class '__main__.Plotter'>, <class 'object'>
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)
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"""
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