ESMM似乎不支持字符串类型sparse特征的输入？？

[eshaoliu]

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Describe the question(问题描述)
当我用deepctr的ESMM输入sparseFeatwithDic的特征的时候，没办法解析此类特征，导致raise NotImplementedError("dnn_feature_columns can not be empty list")
NotImplementedError: dnn_feature_columns can not be empty list。强行将feature——column.py重的input_from_feature_columns方法兼容sparseFeatwithDic，运行时embedding lookup会报错tensorflow.python.framework.errors_impl.UnimplementedError: Cast string to int32 is not supported。不知道是不是只有把特征处理成SparseFeat一条路了？
Additional context
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Operating environment(运行环境):

• python version [e.g. 3.6]
• tensorflow version 2.5
• deepctr version master