AttributeError: 'MultiTrace' object has no attribute 'posterior'

Questions v3
1

idata.posterior[“alpha”].sel(draw=slice(0, 4))

AttributeError Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_6648\586317849.py in
----> 1 idata.posterior[“alpha”].sel(draw=slice(0, 4))

D:\Users\admin\anaconda3\lib\site-packages\pymc3\backends\base.py in getattr(self, name)
365 if name in self.stat_names:
366 return self.get_sampler_stats(name)
→ 367 raise AttributeError(f"‘{type(self).name}’ object has no attribute ‘{name}’")
368
369 def len(self):

AttributeError: ‘MultiTrace’ object has no attribute ‘posterior’

2

How did you generate idata (i.e., what arguments did you pass to pm.sample())? And what version of pymc are you using? It looks like you are assuming a (v4-style) inferenceData object, but idata is instead a (v3-style) MultiTrace object.