Getting ready for release 3.3.1 (again)

Author: FrancescAlted

ANNOUNCE.rst

@@ -1,12 +1,16 @@
-Announcing Python-Blosc2 3.3.0
+Announcing Python-Blosc2 3.3.1
 ==============================
 
-We are introducing a new blosc2.transpose() function for natively transposing
-2D NDArray instances, and a fast path for NDArray.slice() that delivers up to
-40x speedup when slices align with underlying chunks. Documentation has also
-been improved with several edits throughout.
+In our effort to better adapt to better adapt to the array API
+(https://data-apis.org/array-api/latest/), we have introduced
+permute_dims() and matrix_transpose() functions, and the .T property.
+This replaces to previous transpose() function, which is now deprecated.
+See PR #384.  Thanks to Ricardo Sales Piquer (@ricardosp4).
 
-See benchmarks at: https://github.com/Blosc/python-blosc2/blob/main/bench/ndarray/aligned_chunks.py
+We have also reduced the memory footprint of constructors like ``arange()``,
+``linspace()`` and ``fromiter()`` by a large factor. As an example, a 5 TB
+array of 8-byte floats now uses less than 200 MB of memory instead of
+170 GB previously.
 
 You can think of Python-Blosc2 3.x as an extension of NumPy/numexpr that:
 

RELEASE_NOTES.md

@@ -2,7 +2,24 @@
 
 ## Changes from 3.3.0 to 3.3.1
 
-XXX version-specific blurb XXX
+* In our effort to better adapt to better adapt to the array API
+  (https://data-apis.org/array-api/latest/), we have introduced
+  permute_dims() and matrix_transpose() functions, and the .T property.
+  This replaces to previous transpose() function, which is now deprecated.
+  See PR #384.  Thanks to Ricardo Sales Piquer (@ricardosp4).
+
+* Constructors like `arange()`, `linspace()` and `fromiter()` now
+  use far less memory when creating large arrays. As an example, a 5 TB
+  array of 8-byte floats now uses less than 200 MB of memory instead of
+  170 GB previously.  See PR #387.
+
+* Now, when opening a lazy expression with `blosc2.open()`, and there is
+  a missing operand, the open still works, but the dtype and shape
+  attributes are None.  This is useful for lazy expressions that have
+  lost some operands, but you still want to open them for inspection.
+  See PR #385.
+
+* Added an example of getting a slice out of a C2Array.
 
 ## Changes from 3.2.1 to 3.3.0