Fix independent_rvs determination in vectorize_over_posterior
#7890
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #7890 +/- ##
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Coverage 92.94% 92.94%
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Files 116 116
Lines 18851 18851
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+ Hits 17521 17522 +1
+ Misses 1330 1329 -1
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ricardoV94
reviewed
Aug 19, 2025
| and not ({*outputs, *independent_rvs} & set(rv_ancestors)) | ||
| and {var for var in rv_ancestors if var in all_rvs} <= {rv, *needed_rvs} | ||
| if rv not in needed_rvs and not ( | ||
| {*outputs, *needed_rvs, *independent_rvs} & set(rv_ancestors) |
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outputs / needed_rvs / independent_rvs are also the blockers store than in an intermediate variable?
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filter rv not in needed_rvs already in the list comp that starts this loop?
Comment on lines
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| a_ancestor1 = get_var_by_name([vectorized_no_intermediate], "a")[0] | ||
| a_ancestor2 = get_var_by_name([vectorized_intermediate_rvs], "a")[0] |
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Assuming there should only be one match:
Suggested change
| a_ancestor1 = get_var_by_name([vectorized_no_intermediate], "a")[0] | |
| a_ancestor2 = get_var_by_name([vectorized_intermediate_rvs], "a")[0] | |
| [a_ancestor1] = get_var_by_name([vectorized_no_intermediate], "a") | |
| [a_ancestor2] = get_var_by_name([vectorized_intermediate_rvs], "a") |
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Description
This PR fixes the determination of
independent_rvsRVs invectorize_over_posterior. I think that the fixed check is much clearer now. It says that anrvis independent if it doesn't depend on anoutput, aneeded_rv(a model freeRV that is replaced by its posterior samples), or anotherindependent_rv. To make sure the check works correctly, the candidate rv nodes are searched in the order given by their topological sort.Related Issue
vectorize_over_posteriorfails to determineindependent_rvs#7889Checklist
Type of change
📚 Documentation preview 📚: https://pymc--7890.org.readthedocs.build/en/7890/