modules.py

"""
Created on May 19, 2021

modules of NFM: DNN

@author: Ziyao Geng(zggzy1996@163.com)
"""

import tensorflow as tf
from tensorflow.keras.layers import Dense, Dropout, Layer


class DNN(Layer):
    def __init__(self, hidden_units, activation='relu', dropout=0.):
        """Deep Neural Network
		:param hidden_units: A list. Neural network hidden units.
		:param activation: A string. Activation function of dnn.
		:param dropout: A scalar. Dropout number.
		"""
        super(DNN, self).__init__()
        self.dnn_network = [Dense(units=unit, activation=activation) for unit in hidden_units]
        self.dropout = Dropout(dropout)

    def call(self, inputs, **kwargs):
        x = inputs
        for dnn in self.dnn_network:
            x = dnn(x)
        x = self.dropout(x)
        return x