keras中使用concatenate报错

Layer concatenate_1 was called with an input that isn't a symbolic tensor. Received type: <class 'tuple'>. Full input:

原代码

x = concatenate((input_1, input_2), axis=1)

修改代码

x = concatenate([input_1, input_2], axis=1)

标签：concatenate,Received,keras,报错,原代码,input,axis
来源： https://blog.csdn.net/Stanford6/article/details/119374967