91f6e58e9a
* Allow customizing unit for temperature and pressure sensors * pylint * Adjust google_wifi tests * Address review comments and add tests * Improve rounding when scaling * Tweak rounding * Further tweak rounding * Allow setting entity options with config/entity_registry/update * Address review comments * Tweak tests * Load custom unit when sensor is added * Override async_internal_added_to_hass * Adjust tests after rebase * Apply suggestions from code review Co-authored-by: Paulus Schoutsen <balloob@gmail.com> * Address review comments Co-authored-by: Paulus Schoutsen <balloob@gmail.com>
73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
"""Temperature util functions."""
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from homeassistant.const import (
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TEMP_CELSIUS,
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TEMP_FAHRENHEIT,
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TEMP_KELVIN,
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TEMPERATURE,
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UNIT_NOT_RECOGNIZED_TEMPLATE,
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)
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VALID_UNITS: tuple[str, ...] = (
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TEMP_CELSIUS,
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TEMP_FAHRENHEIT,
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TEMP_KELVIN,
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)
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def fahrenheit_to_celsius(fahrenheit: float, interval: bool = False) -> float:
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"""Convert a temperature in Fahrenheit to Celsius."""
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if interval:
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return fahrenheit / 1.8
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return (fahrenheit - 32.0) / 1.8
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def kelvin_to_celsius(kelvin: float, interval: bool = False) -> float:
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"""Convert a temperature in Kelvin to Celsius."""
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if interval:
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return kelvin
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return kelvin - 273.15
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def celsius_to_fahrenheit(celsius: float, interval: bool = False) -> float:
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"""Convert a temperature in Celsius to Fahrenheit."""
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if interval:
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return celsius * 1.8
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return celsius * 1.8 + 32.0
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def celsius_to_kelvin(celsius: float, interval: bool = False) -> float:
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"""Convert a temperature in Celsius to Fahrenheit."""
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if interval:
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return celsius
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return celsius + 273.15
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def convert(
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temperature: float, from_unit: str, to_unit: str, interval: bool = False
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) -> float:
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"""Convert a temperature from one unit to another."""
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if from_unit not in (TEMP_CELSIUS, TEMP_FAHRENHEIT, TEMP_KELVIN):
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raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(from_unit, TEMPERATURE))
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if to_unit not in (TEMP_CELSIUS, TEMP_FAHRENHEIT, TEMP_KELVIN):
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raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(to_unit, TEMPERATURE))
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if from_unit == to_unit:
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return temperature
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if from_unit == TEMP_CELSIUS:
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if to_unit == TEMP_FAHRENHEIT:
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return celsius_to_fahrenheit(temperature, interval)
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# kelvin
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return celsius_to_kelvin(temperature, interval)
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if from_unit == TEMP_FAHRENHEIT:
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if to_unit == TEMP_CELSIUS:
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return fahrenheit_to_celsius(temperature, interval)
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# kelvin
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return celsius_to_kelvin(fahrenheit_to_celsius(temperature, interval), interval)
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# from_unit == kelvin
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if to_unit == TEMP_CELSIUS:
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return kelvin_to_celsius(temperature, interval)
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# fahrenheit
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return celsius_to_fahrenheit(kelvin_to_celsius(temperature, interval), interval)
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