def METHOD_NAME(self):
    """
    Retrieves current temperature reading from PSU
    Returns:
        A float number of current temperature in Celsius up to nearest thousandth
        of one degree Celsius, e.g. 30.125 
    """
    temp_path = "{}{}".format(self.hwmon_path, 'psu_temp1_input')        
    val=self._api_helper.read_txt_file(temp_path)
    if val is not None:
        return float(val)/1000
    else:
        return 0