Getting ready for release 4.5.0

Author: FrancescAlted

ANNOUNCE.rst

@@ -1,46 +1,44 @@
-Announcing Python-Blosc2 4.4.5
+Announcing Python-Blosc2 4.5.0
 ==============================
 
-We are happy to announce this release, which promotes the ``b2view``
-terminal data viewer to a core feature — installed by default and with new
-interactive row and column filtering — and makes BatchArray block layouts
-(and hence compression ratios) reproducible across CPUs.
+We are happy to announce this release, which teaches the ``b2view``
+terminal data viewer to **plot**, gives ``CTable`` a **pandas-like display
+and CSV** experience, and publishes **WASM/Pyodide wheels to PyPI**.
 
 The main highlights are:
 
-- **b2view installed by default**: the terminal browser for Blosc2 stores
-  (``.b2d`` directories and ``.b2z`` files) now ships with the package —
-  no extras needed.  It shows the tree of a store and pages through
-  NDArrays of any dimensionality and CTables far larger than the screen.
+- **Plotting in b2view**: press ``p`` on a numeric series (a CTable column
+  or an array row) to draw an in-terminal line plot.  Plots are
+  peak-preserving min/max envelopes by default, so no spike or trough is
+  hidden however large the series is — large local series stream their
+  envelope *exactly*.  Zoom into a row range, press ``v`` to lock the data
+  grid to it, or ``h`` to open a high-resolution ``matplotlib`` view (new
+  optional ``hires`` extra).
 
-- **Interactive filtering**: press ``f`` on a CTable to type the same
-  string expressions ``CTable.where()`` accepts (dotted nested names,
-  ``and``/``or``) and page through just the matching rows, and ``/`` to
-  narrow the visible columns by substring.  Both filters combine, are
-  remembered per node, and escape clears them one layer at a time.
+- **pandas-like CTable display**: ``to_string()`` now renders the whole
+  table by default (with ``max_rows``/``max_width`` to truncate), ``repr``
+  shows the same truncated table as ``str``, and a new
+  ``blosc2.printoptions(...)`` context manager plus ``display_width`` /
+  ``display_rows`` options control the view.  ``to_csv()`` called without a
+  path now returns the CSV as a string.
 
-- **Friendlier mouse and navigation**: the terminal keeps the mouse by
-  default, so selecting and copying text works as usual (``--mouse`` opts
-  into capture with click-to-focus and wheel scrolling); ``?`` opens a key
-  reference, ``c`` jumps to a column by name or index, and float columns
-  align their decimal points.
+- **WASM/Pyodide wheels on PyPI**: ``blosc2`` now ships ``pyemscripten``
+  wheels for CPython 3.13 and 3.14, so it is ``micropip``-installable in
+  Pyodide straight from PyPI.
 
-- **Reproducible BatchArray layouts**: automatic variable-length block
-  sizing now uses fixed byte budgets per compression level instead of the
-  CPU cache sizes, so the layout — and the compression ratio — no longer
-  depends on the machine that created the array.
+- **Faster strided reads**: ``NDArray`` and ``Column`` getitem gain fast
+  paths for large strides and identity gathers, and compact CTable queries
+  prune more blocks via cross-column index pruning.
 
-A quick taste of ``b2view``::
+A quick taste of the new plotting — open a store and press ``p`` on a
+numeric column::
 
     $ pip install blosc2 --upgrade
     $ b2view chicago-taxi.b2z
 
-Then press ``f`` on the table node and type a filter, e.g.::
-
-    payment.tips > 100 and trip.km > 0 and trip.sec > 0
-
-and page through the 67 matching trips of the 24-million-row table —
-instantly, and without decompressing anything you do not look at.
+Zoom into a range, press ``v`` to pin the grid to it, then ``h`` for a
+high-resolution view — all without decompressing anything you do not look
+at.
 
 Install it with::
 

RELEASE_NOTES.md

@@ -1,8 +1,30 @@
 # Release notes
 
-## Changes from 4.4.5 to 4.4.6
-
-XXX version-specific blurb XXX
+## Changes from 4.4.5 to 4.5.0
+
+This release teaches the `b2view` terminal viewer to **plot** — peak-preserving
+envelope line plots of any series, with zoom, a row-window lock, and an optional
+high-resolution matplotlib view — and gives `CTable` a **pandas-like display and
+CSV** experience.  It also publishes **WASM/Pyodide wheels to PyPI** and adds
+faster strided reads for `NDArray` and `Column`.
+
+### b2view: plotting and data inspection
+
+- **In-terminal plots**: press `p` on a numeric series (a CTable column or an
+  array row) to draw a braille line plot.  Plots are **peak-preserving min/max
+  envelopes by default**, so no spike or trough is hidden however large the
+  series is; large local series stream their envelope *exactly* in bounded
+  spans (only remote c2arrays fall back to a labeled strided sample).
+- **Zoom and row-window lock**: zoom the plot into a row range and pan it; press
+  `v` to **lock the data grid to the plotted range** so paging stays inside it
+  (escape unlocks).  The plot and high-res views honor the locked window.
+- **High-resolution view**: `h` opens a high-res `matplotlib` image of the
+  plotted range (new optional `hires` extra: `matplotlib` + `textual-image`).
+- **On-demand cell decode**: `enter` decodes a single skipped/expensive CTable
+  cell, and SChunk nodes now preview as a paged hex dump.
+- **Fixes and polish**: row paging re-aligns to the page grid after dim-mode
+  single-row scrolls; the data panel now focuses correctly with
+  `--path ... --panel data`; status chips are branded yellow.
 
 ### CTable display
 
@@ -32,6 +54,31 @@ XXX version-specific blurb XXX
   `pandas`' `DataFrame.to_csv()`.  Passing a path still writes the file (and
   returns `None`); the returned string is byte-for-byte the same as the file.
 
+### Performance
+
+- **Faster strided reads**: `NDArray.__getitem__` gains a sparse-gather fast
+  path for large strides, and `Column.__getitem__` short-circuits when the
+  logical positions equal the physical ones.
+- **Fix**: a negative `step` in `Column` getitem could return `[]`; it now
+  returns the reversed selection.
+
+### Indexing
+
+- **Fix**: a sidecar-handle cache collision could return the wrong SUMMARY
+  index for a compact-store column.
+- **Cross-column index pruning** is now enabled for compact CTable queries, so
+  more predicates prune blocks before any data is materialized.  The docs also
+  note when summary indexes are *not* created automatically.
+
+### Packaging
+
+- **WASM/Pyodide wheels on PyPI**: the main wheel build now also produces
+  `pyemscripten` wheels for CPython 3.13 (2025 ABI) and 3.14 (2026 ABI) and
+  uploads them to PyPI, so `blosc2` is `micropip`-installable in Pyodide.  The
+  cp313 build is pinned to Pyodide 0.29.3 (0.29.4 regresses `SChunk` slicing),
+  and `b2view` prints a clear message instead of crashing when run under WASM.
+- **cibuildwheel updated to 4.1.**
+
 ## Changes from 4.4.3 to 4.4.5
 
 Note: 4.4.4 was skipped due to a failure during the release process.

pyproject.toml

@@ -43,7 +43,7 @@ dependencies = [
     "textual-plotext",
     "threadpoolctl; platform_machine != 'wasm32'",
 ]
-version = "4.4.6.dev0"
+version = "4.5.0"
 [project.entry-points."array_api"]
 blosc2 = "blosc2"
 

src/blosc2/version.py

@@ -1,2 +1,2 @@
-__version__ = "4.4.6.dev0"
+__version__ = "4.5.0"
 __array_api_version__ = "2024.12"