what does the question mark in tensorflow shape mean?

Question

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I'm looking into magenta code, and printing its tensor object. I got this result:

Tensor("fully_connected/BiasAdd:0", shape=(?, 38), dtype=float32)

What does this question mark in shape mean?

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1 Answer

深蓝 · Answer 1 · 2021-10-23T17:50:06+0000

answered Oct 24, 2021 by 深蓝 (71.8m points)

It means that first dimension is not fixed in the graph and it can vary between run calls

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