Why I cannot plot with pymc3.traceplot or arviz.plot_trace?

az.plot_posterior is also unavailable.
Result is as follow:

Only array without pictures.

I wonder how can I find the plots to prove my views.

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I think you need to show it:

import matplotlib.pyplot as plt
import arviz as az

# build model and sample here



Check out the documentation for usage details.

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Thank you. The usege of arviz is different from pymc3.traceplot.

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