Commit 421d1c07 authored by Yifei Feng's avatar Yifei Feng
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In model_to_estimator, only run get_weights when there are initialized Keras... 

In model_to_estimator, only run get_weights when there are initialized Keras variables(which assumes there exists a session). Otherwise create a session so that we can run get_config().
Actually fix #18193.

PiperOrigin-RevId: 192541442
parent 68e26412
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