Remove deprecated `AffineScalar` bijector

[thegodone]

How to fix this deprecated function with recent tfp ?

 71 self.logisitc_match = tfb.Chain(

---> 72 [tfb.AffineScalar(shift=tf.cast(0, tf.float64), scale=tf.cast(1, tf.float64)), tfb.Sigmoid()])

AttributeError: module 'tensorflow_probability.python.bijectors' has no attribute 'AffineScalar'

proposal is to replace by shift function but it's exactly same function as in line for logistic_gap ...

   self.logistic_gap = tfb.Chain(
        [tfb.Shift(tf.cast(0, tf.float64))(tfb.Scale(tf.cast(1, tf.float64))), tfb.Sigmoid()])
    self.logisitc_match = tfb.Chain(
        [tfb.Shift(tf.cast(0, tf.float64))(tfb.Scale(tf.cast(1, tf.float64))), tfb.Sigmoid()])

any idea ?

[thegodone]

WARNING:tensorflow:From /opt/conda/lib/python3.8/site-packages/boss-0.0.1-py3.8.egg/boss/code/GPflow_wrappers/Batch_SSK.py:25: AffineScalar.init (from tensorflow_probability.python.bijectors.affine_scalar) is deprecated and will be removed after 2020-01-01.
Instructions for updating:
AffineScalar bijector is deprecated; please use tfb.Shift(loc)(tfb.Scale(...)) instead.

[Ryan-Rhys]

Hi @thegodone thanks for raising this and apologies for the delay in getting back!

@henrymoss this seems to be related to your BOSS code? Any ideas?

[thegodone]

My issue is that anyway apply the tfb.Shift modification providing Nan loss output. I cannot test with the previous method

[Ryan-Rhys]

@henrymoss