51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
"""Pressure util functions."""
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from __future__ import annotations
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from numbers import Number
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from homeassistant.const import (
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PRESSURE,
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PRESSURE_BAR,
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PRESSURE_HPA,
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PRESSURE_INHG,
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PRESSURE_MBAR,
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PRESSURE_PA,
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PRESSURE_PSI,
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UNIT_NOT_RECOGNIZED_TEMPLATE,
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)
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VALID_UNITS: tuple[str, ...] = (
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PRESSURE_PA,
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PRESSURE_HPA,
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PRESSURE_BAR,
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PRESSURE_MBAR,
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PRESSURE_INHG,
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PRESSURE_PSI,
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)
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UNIT_CONVERSION: dict[str, float] = {
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PRESSURE_PA: 1,
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PRESSURE_HPA: 1 / 100,
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PRESSURE_BAR: 1 / 100000,
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PRESSURE_MBAR: 1 / 100,
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PRESSURE_INHG: 1 / 3386.389,
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PRESSURE_PSI: 1 / 6894.757,
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}
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def convert(value: float, unit_1: str, unit_2: str) -> float:
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"""Convert one unit of measurement to another."""
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if unit_1 not in VALID_UNITS:
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raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_1, PRESSURE))
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if unit_2 not in VALID_UNITS:
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raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_2, PRESSURE))
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if not isinstance(value, Number):
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raise TypeError(f"{value} is not of numeric type")
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if unit_1 == unit_2:
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return value
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pascals = value / UNIT_CONVERSION[unit_1]
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return pascals * UNIT_CONVERSION[unit_2]
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