def METHOD_NAME(self):
    pp_water_vapour = (
        100
        * self.relative_humidity
        * (
            6.1078
            * math.pow(
                10,
                (((7.5 * (self.temperature + 273.15)) - 2048.625)) / (self.temperature + 273.15 - 35.85),
            )
        )
    )
    pp_dry_air = 100 * self.barometric_pressure - pp_water_vapour
    self.air_density = (pp_dry_air / (287.058 * (self.temperature + 273.15))) + (
        pp_water_vapour / (461.495 * (self.temperature + 273.15))
    )