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Fix for pickling an MCMC object with HMCGibbs (and MixedHMC) samplers and parallel chains #1746

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merged 2 commits into from
Feb 26, 2024
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Fix for pickling an MCMC object with HMCGibbs (and MixedHMC) samplers and parallel chains #1746

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87eb0a9
Remove jax tracers from MixedHMC.__getstate__()
msaintja Feb 24, 2024
cb940a4
Remove jax tracers from HMCGibbs serialization
msaintja Feb 25, 2024
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5 changes: 5 additions & 0 deletions numpyro/infer/hmc_gibbs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -186,6 +186,11 @@ def potential_fn(z_gibbs, z_hmc):

return HMCGibbsState(z, hmc_state, rng_key)

def __getstate__(self):
state = self.__dict__.copy()
state["_prototype_trace"] = None
return state


def _discrete_gibbs_proposal_body_fn(
z_init_flat, unravel_fn, pe_init, potential_fn, idx, i, val
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2 changes: 2 additions & 0 deletions numpyro/infer/mixed_hmc.py
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Expand Up @@ -307,4 +307,6 @@ def body_fn(i, vals):
def __getstate__(self):
state = self.__dict__.copy()
state["_wa_update"] = None
state["_prototype_trace"] = None
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state["_support_sizes_flat"] = None
return state
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