问我能否在Keras中定义两个不同的调用函数，一个用于foward映射，另一个用于逆映射。

EN

import tensorflow as tf
import tensorflow.keras.layers as layers

class INNBlock(tf.keras.Model):
#inheriting from model instead of keras.layers.Layer, because I want manage the 
#underlying layer as well
    def __init__(self, size):
        super(INNBlock, self).__init__(name='innblock')
        #define layers
        self.denseL1 = layers.Dense(size,activation='relu')

    def call(self, inputs):
        #define the relationship between the layers for a foward call
        out = self.denseL1(inputs)
        return out

    def inverse_call(self, inputs):
        #define inverse relationship between the layer
        out = -self.denseL1(inputs) #use the same weights as the foward call
        return out

class INN(tf.keras.Model):
    def __init__(self,kenel_size,input_dim,min_clip,max_clip):
        super(INN, self).__init__()
        self.block_1 = INNBlock(size)
        self.block_2 = INNBlock(size)

    def call(self, inputs):
        x = self.block_1(inputs)
        x = self.block_2.inverse_call(y)
        x = self.block_1.inverse_call(x)
        return (y,x)