STD_TYPES.py

class Temperature:
    def __init__(self, temperature: float):
        # self.temp = temperature  # °C
        self.data = temperature  # °C


class Pressure:
    def __init__(self, pressure: float):
        # self.pressure = pressure  # MPa
        self.data = pressure  # MPa


class Enthalpy:
    def __init__(self, enthalpy: float):
        # self.enthalpy = enthalpy  # kJ/kg
        self.data = enthalpy  # kJ/kg


class Entropy:
    def __init__(self, entropy: float):
        # self.entropy = entropy  # kJ/kg·K
        self.data = entropy  # kJ/kg·K


class Specific_Volume:
    def __init__(self, s_volume: float):
        # self.s_volume = s_volume  # m³/kg
        self.data = s_volume  # m³/kg


class InternalEnergy:
    def __init__(self, internal_energy: float):
        # self.internal_energy = internal_energy  # kJ/kg
        self.data = internal_energy  # kJ/kg


class X:
    def __init__(self, x: float):
        if 1.0 >= x >= 0.0:
            self.data = x
        else:
            self.data = -1