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Dion Moult
67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
import math
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class SIUnitHelper:
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prefixes = {"EXA": 1e18, "PETA": 1e15, "TERA": 1e12, "GIGA": 1e9, "MEGA":
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1e6, "KILO": 1e3, "HECTO": 1e2, "DECA": 1e1, "DECI": 1e-1, "CENTI":
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1e-2, "MILLI": 1e-3, "MICRO": 1e-6, "NANO": 1e-9, "PICO": 1e-12,
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"FEMTO": 1e-15, "ATTO": 1e-18}
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unit_names = ["AMPERE", "BECQUEREL", "CANDELA", "COULOMB",
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"CUBIC_METRE", "DEGREE CELSIUS", "FARAD", "GRAM", "GRAY", "HENRY",
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"HERTZ", "JOULE", "KELVIN", "LUMEN", "LUX", "MOLE", "NEWTON", "OHM",
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"PASCAL", "RADIAN", "SECOND", "SIEMENS", "SIEVERT", "SQUARE METRE",
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"METRE", "STERADIAN", "TESLA", "VOLT", "WATT", "WEBER"]
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si_conversions = {
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'inch': 0.0254,
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'foot': 0.3048,
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'yard': 0.914,
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'mile': 1609,
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'square inch': 0.0006452,
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'square foot': 0.09290,
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'square yard': 0.83612736,
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'acre': 4046.86,
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'square mile': 2588881,
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'cubic inch': 0.00001639,
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'cubic foot': 0.02832,
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'cubic yard': 0.7636,
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'litre': 0.001,
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'fluid ounce UK': 0.0000284130625,
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'fluid ounce US': 0.00002957353,
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'pint UK': 0.000568,
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'pint US': 0.000473,
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'gallon UK': 0.004546,
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'gallon US': 0.003785,
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'degree': math.pi/180,
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'ounce': 0.02835,
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'pound': 0.454,
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'ton UK': 1016.0469088,
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'ton US': 907.18474,
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'lbf': 4.4482216153,
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'kip': 4448.2216153,
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'psi': 6894.7572932,
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'ksi': 6894757.2932,
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'minute': 60,
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'hour': 3600,
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'day': 86400,
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'btu': 1055.056}
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@staticmethod
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def get_prefix(text):
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for prefix in SIUnitHelper.prefixes.keys():
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if prefix in text.upper():
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return prefix
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@staticmethod
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def get_prefix_multiplier(text):
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if not text:
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return 1
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prefix = SIUnitHelper.get_prefix(text)
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if prefix:
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return SIUnitHelper.prefixes[prefix]
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return 1
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@staticmethod
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def get_unit_name(text):
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for name in SIUnitHelper.unit_names:
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if name in text.upper().replace('METER', 'METRE'):
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return name
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