Tensorflow：-不支持的操作数类型：“Sequential”和“Sequential”

pip install --upgrade tensorflow

model1 = tf.keras.Sequential([...])
model2 = tf.keras.Sequential([...])
combined_model = tf.keras.Sequential([model1, model2])  # 这里可能会导致问题

model1 = tf.keras.Sequential([...])
model2 = tf.keras.Sequential([...])
combined_model = tf.keras.Sequential([
    model1,
    model2
])

class CombinedModel(tf.keras.Model):
    def __init__(self):
        super(CombinedModel, self).__init__()
        self.model1 = tf.keras.Sequential([...])
        self.model2 = tf.keras.Sequential([...])

    def call(self, inputs):
        x = self.model1(inputs)
        return self.model2(x)

combined_model = CombinedModel()