45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
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class Capital:
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class __Singleton:
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def __init__(self, city_name):
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self.val = None
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self.city_name = city_name
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def __str__(self):
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return repr(self) + self.val
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def name(self):
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return self.city_name
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instance = None
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def __new__(cls, city_name): # _new_ est toujours une méthode de classe
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if not Capital.instance:
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Capital.instance = Capital.__Singleton(city_name)
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return Capital.instance
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def __getattr__(self, attr):
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return getattr(self.instance, attr)
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def __setattr__(self, attr, val):
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return setattr(self.instance, attr, val)
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@staticmethod
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def name():
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return Capital.instance.name()
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if __name__ == '__main__':
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# These "asserts" using only for self-checking and not necessary for auto-testing
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ukraine_capital_1 = Capital("Kyiv")
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ukraine_capital_2 = Capital("London")
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ukraine_capital_3 = Capital("Marocco")
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assert ukraine_capital_2.name() == "Kyiv"
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assert ukraine_capital_3.name() == "Kyiv"
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assert ukraine_capital_2 is ukraine_capital_1
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assert ukraine_capital_3 is ukraine_capital_1
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print("Coding complete? Let's try tests!")
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