1. 什么是NoneType
來自stackoverflow上的回答：NoneType is the type for the None object, which is an object that indicates no value. None is the return value of functions that "don't return anything". It is also a common default return value for functions that search for something and may or may not find it;
2 . 出現的問題
問題代碼如下
1 model = AE() 2 model = model.build(input_shape=(None, 784)) 3 model.summary()
第2行代碼出錯了，model.build()是不返回什么的。所以此時model變成了NoneType object，而NoneType object並沒有summary屬性，所以直接報錯'NoneType' object has no attribute 'summary'