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Combining assert_scalar_positive with jax.vmap #389

@thomaspinder

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@thomaspinder

Is it possible to apply assert_scalar_positive to a vector? The MWE below shows what I'd like to do; however, I cannot currently see how this is possible with Chex.

import jax.numpy as jnp 
import jax
from chex import assert_scalar_positive

x_scaler = 1.
x_vector = jnp.array([1.,1.]) 

assert_scalar_positive(x_scaler) # Works
jax.vmap(assert_scalar_positive)(x_vector) # What I'd like

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