def dms_deg(degree_tuple):
    """
    Convert degree minute'  second'' to decimal angle
    
    :param degree_tuple: (degree, minute, second) tuple
    :return: Decimal angle in degrees
    
    Example:   
        >>> import units as u
        >>> 
        >>> u.dms_deg((45, 23, 34))
        45.39277777777778
    
    """
    degree, minute, second = degree_tuple
    decimal_degree = degree + minute/60.0 + second/3600.0
    return decimal_degree