class AE(nn.Module):
    def __init__(self, n_latent):
        super(AE, self).__init__()
        self.encoder = nn.Sequential(
            nn.Linear(28 * 28, 128),
            nn.ReLU(True),
            nn.Linear(128, 64),
            nn.ReLU(True), 
            nn.Linear(64, n_latent))
        self.decoder = nn.Sequential(
            nn.Linear(n_latent, 64),
            nn.ReLU(True),
            nn.Linear(64, 128),
            nn.ReLU(True), 
            nn.Linear(128, 28 * 28), 
            nn.Sigmoid())
        
    def forward(self, x):
        x = self.encoder(x)
        x = self.decoder(x)
        return x