Questions about GATE_OP

[wandli]

Hi,

Thanks for releasing the code.

I noticed that there is an unused variable named GATE_OP and is assigned the value 1 at the beginning of the code. GATE_OP is later passed to gate_gradients at function compute_gradients, but the gate_gradients is neither used ever in the following code.

Would you please give me some idea about the usage of GATE_OP? Thanks in advance.