old_contents: """Pressure util functions."""
  from __future__ import annotations
  
  from numbers import Number
  
  from homeassistant.const import (
      PRESSURE,
      PRESSURE_HPA,
      PRESSURE_INHG,
      PRESSURE_MBAR,
      PRESSURE_PA,
      PRESSURE_PSI,
      UNIT_NOT_RECOGNIZED_TEMPLATE,
  )
  
  VALID_UNITS: tuple[str, ...] = (
      PRESSURE_PA,
      PRESSURE_HPA,
      PRESSURE_MBAR,
      PRESSURE_INHG,
      PRESSURE_PSI,
  )
  
  UNIT_CONVERSION: dict[str, float] = {
      PRESSURE_PA: 1,
      PRESSURE_HPA: 1 / 100,
      PRESSURE_MBAR: 1 / 100,
      PRESSURE_INHG: 1 / 3386.389,
      PRESSURE_PSI: 1 / 6894.757,
  }
  
  
  def convert(value: float, unit_1: str, unit_2: str) -> float:
      """Convert one unit of measurement to another."""
      if unit_1 not in VALID_UNITS:
          raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_1, PRESSURE))
      if unit_2 not in VALID_UNITS:
          raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_2, PRESSURE))
  
      if not isinstance(value, Number):
          raise TypeError(f"{value} is not of numeric type")
  
      if unit_1 == unit_2:
          return value
  
      pascals = value / UNIT_CONVERSION[unit_1]
      return pascals * UNIT_CONVERSION[unit_2]
  
new_contents: """Pressure util functions."""
  from __future__ import annotations
  
  from numbers import Number
  
  from homeassistant.const import (
      PRESSURE,
      PRESSURE_BAR,
      PRESSURE_HPA,
      PRESSURE_INHG,
      PRESSURE_MBAR,
      PRESSURE_PA,
      PRESSURE_PSI,
      UNIT_NOT_RECOGNIZED_TEMPLATE,
  )
  
  VALID_UNITS: tuple[str, ...] = (
      PRESSURE_PA,
      PRESSURE_HPA,
      PRESSURE_BAR,
      PRESSURE_MBAR,
      PRESSURE_INHG,
      PRESSURE_PSI,
  )
  
  UNIT_CONVERSION: dict[str, float] = {
      PRESSURE_PA: 1,
      PRESSURE_HPA: 1 / 100,
      PRESSURE_BAR: 1 / 100000,
      PRESSURE_MBAR: 1 / 100,
      PRESSURE_INHG: 1 / 3386.389,
      PRESSURE_PSI: 1 / 6894.757,
  }
  
  
  def convert(value: float, unit_1: str, unit_2: str) -> float:
      """Convert one unit of measurement to another."""
      if unit_1 not in VALID_UNITS:
          raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_1, PRESSURE))
      if unit_2 not in VALID_UNITS:
          raise ValueError(UNIT_NOT_RECOGNIZED_TEMPLATE.format(unit_2, PRESSURE))
  
      if not isinstance(value, Number):
          raise TypeError(f"{value} is not of numeric type")
  
      if unit_1 == unit_2:
          return value
  
      pascals = value / UNIT_CONVERSION[unit_1]
      return pascals * UNIT_CONVERSION[unit_2]
  
subject: Add missing PRESSURE_BAR conversion (#54497)