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RGB Color class with a custom RGBColor attribute representing color
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| class RGBColor(int): | |
| def __new__(cls, value): | |
| if not value in range(0, 256): | |
| raise ValueError("RGB values must be in range {0...255}") | |
| # Create the integer instance | |
| return super().__new__(cls, value) | |
| class ColorAttrCustom(Color): | |
| """ Color class with full attribute validation and custom color type """ | |
| def __init__(self, r=0, g=0, b=0): | |
| # __init__ doesn't need local validation | |
| self.r = RGBColor(r) | |
| self.g = RGBColor(g) | |
| self.b = RGBColor(b) | |
| def __setattr__(self, name, value): | |
| if name in ("r", "g", "b"): | |
| if type(value) is int: | |
| # Color range validation here | |
| value = RGBColor(value) | |
| elif type(value) is not RGBColor: | |
| raise ValueError("RGB value should be of type int or RGBColor") | |
| super().__setattr__(name, value) |
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