def correct_point(obj):
    """
    Function to check if object can be used as point coordinates in 3D Decart's system
    :param obj: object to check
    :return: True or False
    """
    check = tuple(obj)
    if len(check) == 3 and all([isinstance(item, (int, float)) for item in check]):
        return True
    else:
        return False