61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
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from __future__ import annotations
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from typing import Union
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import math
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class Gradation:
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grams_per_liter: int
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def __init__(self, grams_per_liter: Union[float, int]):
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self.grams_per_liter = int(grams_per_liter)
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def get_nm(self) -> float:
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return self.grams_per_liter / 10
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def get_kmw(self) -> float:
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return 0.732 * self.get_nm() + 3.2
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def get_oe(self) -> float:
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return self.get_kmw() * (4.54 + 0.022 * self.get_kmw())
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def get_be(self) -> float:
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return self.get_kmw() / 1.53
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def get_bx(self) -> float:
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return self.get_be() / 0.55
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@staticmethod
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def from_nm(nm: float) -> Gradation:
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return Gradation(nm * 10)
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@staticmethod
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def from_kmw(kmw: float) -> Gradation:
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return Gradation.from_nm((kmw - 3.2) / 0.732)
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@staticmethod
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def from_oe(oe: float) -> Gradation:
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return Gradation.from_kmw((-4.54 + math.sqrt(4.54 * 4.54 - 4 * 0.022 * -oe)) / (2 * 0.022))
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def test():
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g1 = Gradation.from_kmw(15)
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assert round(g1.get_kmw(), 1) == 15
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assert round(g1.get_oe(), 0) == 73
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def print_all():
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for i in range(14 * 2, 22 * 2):
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kmw = i / 2
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g = Gradation.from_kmw(kmw)
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print(f"{kmw} -> {g.get_kmw():.1f} °KMW, {g.get_oe():3.0f} °Oe, {g.get_nm():.1f} °NM, {g.grams_per_liter}")
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print("================================")
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for oe in range(65, 110):
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g = Gradation.from_oe(oe)
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print(f"{oe:3} -> {g.get_kmw():.1f} °KMW, {g.get_oe():3.0f} °Oe, {g.get_nm():.1f} °NM, {g.grams_per_liter}")
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if __name__ == '__main__':
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print_all()
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test()
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