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fix(devkit): sort inputs by line_number in load_inputs_and_outputs#4171

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devteamaegis:fix/sort-inputs-by-line-number-2646
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fix(devkit): sort inputs by line_number in load_inputs_and_outputs#4171
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devteamaegis:fix/sort-inputs-by-line-number-2646

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Problem

PFClient.runs.get_details() returned dataframe rows in inconsistent order, causing input rows to be paired with wrong output rows.

Root cause in LocalStorageOperations.load_inputs_and_outputs():

_outputs_padding() already sorts the outputs DataFrame by line_number ascending (line 504), but the inputs DataFrame was left in whatever order the SDK inputs JSON file was written — which depends on async executor completion order.

get_details() then merges inputs and outputs positionally via .to_dict("list") + DataFrame(data), so mismatched orderings cause silently wrong row pairings:

Row inputs (unsorted) outputs (sorted) Correct pairing?
0 line 2 → "third query" line 0 → "ans0" ❌ mismatched
1 line 0 → "first query" line 1 → "ans1" ❌ mismatched
2 line 1 → "second query" line 2 → "ans2" ❌ mismatched

Fixes #2646.

Fix

Sort inputs by line_number ascending inside load_inputs_and_outputs(), immediately after outputs are sorted and indexed, so both DataFrames are in the same order when get_details() merges them:

if LINE_NUMBER in inputs.columns:
    inputs = inputs.sort_values(LINE_NUMBER, ascending=True).reset_index(drop=True)

Tests

Added test_load_inputs_and_outputs_sorts_inputs_by_line_number to tests/sdk_cli_test/unittests/test_local_storage_operations.py:

  • Writes inputs file with rows in out-of-order sequence [line 2, line 0, line 1]
  • Writes outputs file with rows in sorted sequence [line 0, line 1, line 2]
  • Verifies load_inputs_and_outputs() returns inputs sorted as ["first", "second", "third"]

The test fails on main and passes with this fix.

get_details() merges inputs and outputs positionally: it calls
.to_dict("list") on both DataFrames and then constructs a combined
DataFrame from the parallel lists.

_outputs_padding() already sorts outputs by line_number ascending, but
the inputs DataFrame was left in whatever order the JSON file was written
— which depends on async executor completion order.  If inputs arrived as
[line 2, line 0, line 1] and outputs were [line 0, line 1, line 2], the
merged DataFrame incorrectly paired:
  - "third query" → "ans0"  (wrong: ans0 belongs to line 0 = "first query")

The fix sorts inputs by line_number inside load_inputs_and_outputs()
before returning, immediately after outputs are sorted, so both
DataFrames are in the same ascending order when get_details() merges them.

Fixes microsoft#2646
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@devteamaegis devteamaegis force-pushed the fix/sort-inputs-by-line-number-2646 branch from 854f028 to d498d10 Compare June 11, 2026 19:45
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[BUG] Inconsistent order for dataframe rows when loading run details via SDK

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