add predictive for pyro

[adamgayoso]

No description provided.

[codecov]

Codecov Report

Merging #931 (2cd2461) into master (4231575) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #931      +/-   ##
==========================================
+ Coverage   89.30%   89.33%   +0.03%     
==========================================
  Files          73       74       +1     
  Lines        5684     5700      +16     
==========================================
+ Hits         5076     5092      +16     
  Misses        608      608              

Impacted Files	Coverage Δ
scvi/compose/_base_module.py	97.59% <100.00%> (+0.33%)	⬆️
scvi/compose/_pyro.py	100.00% <100.00%> (ø)

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