How to use the nni.utils.NodeType function in nni

"""
    Change json to search space in hyperopt.

    Parameters
    ----------
    in_x : dict/list/str/int/float
        The part of json.
    name : str
        name could be NodeType.ROOT, NodeType.TYPE, NodeType.VALUE or NodeType.INDEX, NodeType.NAME.
    """
    out_y = copy.deepcopy(in_x)
    if isinstance(in_x, dict):
        if NodeType.TYPE in in_x.keys():
            _type = in_x[NodeType.TYPE]
            name = name + '-' + _type
            _value = json2space(in_x[NodeType.VALUE], name=name)
            if _type == 'choice':
                out_y = hp.hp.choice(name, _value)
            elif _type == 'randint':
                out_y = hp.hp.randint(name, _value[1] - _value[0])
            else:
                if _type in ['loguniform', 'qloguniform']:
                    _value[:2] = np.log(_value[:2])
                out_y = getattr(hp.hp, _type)(name, *_value)
        else:
            out_y = dict()
            for key in in_x.keys():
                out_y[key] = json2space(in_x[key], name + '[%s]' % str(key))
    elif isinstance(in_x, list):
        out_y = list()
        for i, x_i in enumerate(in_x):
            if isinstance(x_i, dict):

def json2parameter(in_x, parameter, name=NodeType.ROOT):
    """
    Change json to parameters.
    """
    out_y = copy.deepcopy(in_x)
    if isinstance(in_x, dict):
        if NodeType.TYPE in in_x.keys():
            _type = in_x[NodeType.TYPE]
            name = name + '-' + _type
            if _type == 'choice':
                _index = parameter[name]
                out_y = {
                    NodeType.INDEX:
                    _index,
                    NodeType.VALUE:
                    json2parameter(in_x[NodeType.VALUE][_index],
                                   parameter,
                                   name=name + '[%d]' % _index)
                }
            else:
                if _type in ['quniform', 'qloguniform']:
                    out_y = np.clip(parameter[name], in_x[NodeType.VALUE][0], in_x[NodeType.VALUE][1])
                elif _type == 'randint':
                    out_y = parameter[name] + in_x[NodeType.VALUE][0]
                else:
                    out_y = parameter[name]
        else:
            out_y = dict()
            for key in in_x.keys():
                out_y[key] = json2parameter(in_x[key], parameter,
                                            name + '[%s]' % str(key))

def json2parameter(x, is_rand, random_state, oldy=None, Rand=False, name=NodeType.ROOT):
    """
    Json to pramaters.

    """
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            _value = x[NodeType.VALUE]
            name = name + '-' + _type
            Rand |= is_rand[name]
            if Rand is True:
                if _type == 'choice':
                    _index = random_state.randint(len(_value))
                    y = {
                        NodeType.INDEX: _index,
                        NodeType.VALUE: json2parameter(
                            x[NodeType.VALUE][_index],
                            is_rand,
                            random_state,
                            None,
                            Rand,
                            name=name+"[%d]" % _index
                        )
                    }
                else:
                    y = getattr(parameter_expressions, _type)(*(_value + [random_state]))
            else:
                y = copy.deepcopy(oldy)
        else:
            y = dict()
            for key in x.keys():

"""Randomly generate values for hyperparameters from hyperparameter space i.e., x.

    Parameters
    ----------
    ss_spec:
        hyperparameter space
    random_state:
        random operator to generate random values

    Returns
    -------
    Parameter:
        Parameters in this experiment
    """
    if isinstance(ss_spec, dict):
        if NodeType.TYPE in ss_spec.keys():
            _type = ss_spec[NodeType.TYPE]
            _value = ss_spec[NodeType.VALUE]
            if _type == 'choice':
                _index = random_state.randint(len(_value))
                chosen_params = json2parameter(ss_spec[NodeType.VALUE][_index], random_state)
            else:
                chosen_params = getattr(parameter_expressions, _type)(*(_value + [random_state]))
        else:
            chosen_params = dict()
            for key in ss_spec.keys():
                chosen_params[key] = json2parameter(ss_spec[key], random_state)
    elif isinstance(ss_spec, list):
        chosen_params = list()
        for _, subspec in enumerate(ss_spec):
            chosen_params.append(json2parameter(subspec, random_state))
    else:

def json2space(x, oldy=None, name=NodeType.ROOT):
    """
    Change search space from json format to hyperopt format

    """
    y = list()
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            name = name + '-' + _type
            if _type == 'choice':
                if oldy is not None:
                    _index = oldy[NodeType.INDEX]
                    y += json2space(x[NodeType.VALUE][_index],
                                    oldy[NodeType.VALUE], name=name+'[%d]' % _index)
                else:
                    y += json2space(x[NodeType.VALUE], None, name=name)

def json2parameter(x, is_rand, random_state, oldy=None, Rand=False, name=NodeType.ROOT):
    """
    Json to pramaters.

    """
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            _value = x[NodeType.VALUE]
            name = name + '-' + _type
            Rand |= is_rand[name]
            if Rand is True:
                if _type == 'choice':
                    _index = random_state.randint(len(_value))
                    y = {
                        NodeType.INDEX: _index,
                        NodeType.VALUE: json2parameter(

def json2parameter(x, is_rand, random_state, oldy=None, Rand=False, name=NodeType.ROOT):
    """
    Json to pramaters.

    """
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            _value = x[NodeType.VALUE]
            name = name + '-' + _type
            Rand |= is_rand[name]
            if Rand is True:
                if _type == 'choice':
                    _index = random_state.randint(len(_value))
                    y = {
                        NodeType.INDEX: _index,
                        NodeType.VALUE: json2parameter(
                            x[NodeType.VALUE][_index],
                            is_rand,
                            random_state,
                            None,
                            Rand,
                            name=name+"[%d]" % _index
                        )
                    }

def json2space(x, oldy=None, name=NodeType.ROOT):
    """
    Change search space from json format to hyperopt format

    """
    y = list()
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            name = name + '-' + _type
            if _type == 'choice':
                if oldy is not None:
                    _index = oldy[NodeType.INDEX]
                    y += json2space(x[NodeType.VALUE][_index],
                                    oldy[NodeType.VALUE], name=name+'[%d]' % _index)
                else:
                    y += json2space(x[NodeType.VALUE], None, name=name)
            y.append(name)
        else:
            for key in x.keys():
                y += json2space(x[key], oldy[key] if oldy else None, name+"[%s]" % str(key))
    elif isinstance(x, list):
        for i, x_i in enumerate(x):
            if isinstance(x_i, dict):
                if NodeType.NAME not in x_i.keys():
                    raise RuntimeError('\'_name\' key is not found in this nested search space.')
            y += json2space(x_i, oldy[i] if oldy else None, name + "[%d]" % i)
    return y

def json2parameter(x, is_rand, random_state, oldy=None, Rand=False, name=NodeType.ROOT):
    """
    Json to pramaters.

    """
    if isinstance(x, dict):
        if NodeType.TYPE in x.keys():
            _type = x[NodeType.TYPE]
            _value = x[NodeType.VALUE]
            name = name + '-' + _type
            Rand |= is_rand[name]
            if Rand is True:
                if _type == 'choice':
                    _index = random_state.randint(len(_value))
                    y = {
                        NodeType.INDEX: _index,
                        NodeType.VALUE: json2parameter(
                            x[NodeType.VALUE][_index],
                            is_rand,
                            random_state,
                            None,
                            Rand,
                            name=name+"[%d]" % _index

def json2parameter(in_x, parameter, name=NodeType.ROOT):
    """
    Change json to parameters.
    """
    out_y = copy.deepcopy(in_x)
    if isinstance(in_x, dict):
        if NodeType.TYPE in in_x.keys():
            _type = in_x[NodeType.TYPE]
            name = name + '-' + _type
            if _type == 'choice':
                _index = parameter[name]
                out_y = {
                    NodeType.INDEX:
                    _index,
                    NodeType.VALUE:
                    json2parameter(in_x[NodeType.VALUE][_index],
                                   parameter,