22 lines
509 B
Python
22 lines
509 B
Python
from structure import Structure
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from validate import PositiveFloat, PositiveInteger, String
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class Stock(Structure):
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_types = ()
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name = String()
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shares = PositiveInteger()
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price = PositiveFloat()
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@property
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def cost(self):
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return self.shares * self.price
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def sell(self, nshares: PositiveInteger):
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self.shares -= nshares
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@classmethod
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def from_row(cls, row):
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rowdata = [func(val) for func, val in zip(cls._types, row)]
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return cls(*rowdata)
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