def create_exp_id(exp_network,
                  num_layers,
                  num_neurons,
                  batch_size,
                  num_epochs,
                  learning_method,
                  regularization):
    """Create identifier for particular experiment.

    Parameters
    ----------
    exp_network : string
        RNN/Feedforward
    num_layers : int
        number of feedforward hidden layers
    num_neurons : int
        number of neurons for each hidden layers
        fixed for simplify situation
    batch_size : int
        size of each mini-batch
    num_epochs : int
        total number of training epochs
    learning_method : string
        SGD, momentum SGD, AdaGrad, RMSprop
    regularization : string
        Dropout / L2 regularization

    Returns
    -------
    exp_id : string
        experiment identifier
    """
    exp_id = exp_network + "_"
    exp_id = exp_id + str(num_layers) + "_"
    exp_id = exp_id + str(num_neurons) + "_"
    exp_id = exp_id + str(batch_size) + "_"
    exp_id = exp_id + str(num_epochs) + "_"
    exp_id = exp_id + learning_method + "_"
    exp_id = exp_id + regularization

    return exp_id