Hi,
I am trying to save a Numpyro MCMC object and use its last state as warmup for further sampling. I am using mcmc.post_warmup_state = mcmc.last_state
as suggested in the documentation, but am getting an error when running the loaded model. The code I am using is below.
# Run model and save to pickle
mcmc = MCMC(NUTS(model), num_warmup=warmup_steps,
num_samples=sample_steps, num_chains=1)
mcmc.run(random.PRNGKey(1))
with open(r"mcmc_model.pickle", "wb") as output_file:
pickle.dump(mcmc, output_file)
# Load pickled obj and set warmup to current state
with open(previous_state, "rb") as input_file:
mcmc = pickle.load(input_file)
mcmc.post_warmup_state = mcmc.last_state
mcmc.run(random.PRNGKey(1))
The second mcmc.run call returns a TypeError: 'NoneType' object is not callable
. Does anyone know if the issue is due to saving the MCMC model as a pickle obj?