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RELEASE_NOTES.txt
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RELEASE_NOTES.txt
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=======================================
Release notes for PyTables 2.3 series
=======================================
:Author: Francesc Alted i Abad
:Contact: faltet@pytables.org
Changes from 2.2.1 to 2.3b1
===========================
- Indexes with no elements are now evaluated as non-CSI ones. Closes
#312.
- Numexpr presence is tested now in setup.py, provided that user is not
using setuptools (i.e. ``easy_install`` or ``pip`` tools). When using
setuptools, numexpr continues to be a requisite (and Cython too).
Closes #298.
- Cython is enforced now during compilation time. Also, it is not
required when running tests.
- Repeatedly closing a file that has been reopened several times is
supported now. Closes #318.
- The number of times a file has been currently reopened is available
now in the new `File.open_count` read-only attribute.
Changes from 2.2 to 2.2.1
=========================
- When using `ObjectAtom` objects in `VLArrays` the ``HIGHEST_PROTOCOL``
is used for pickling objects. For NumPy arrays, this simple change
leads to space savings up to 3x and time improvements up to 30x.
Closes #301.
- The `Row` accessor implements a new `__contains__` special method that
allows doing things like::
for row in table:
if item in row:
print "Value found in row", row.nrow
break
Closes #309.
- tables.Expr can perform operations on scalars now. Thanks to Gaëtan
de Menten for providing a patch for this. Closes #287.
- Fixed a problem with indexes larger than 32-bit on leaf objects on
32-bit machines. Fixes #283.
- ``leaf[numpy.array[scalar]]`` idiom returns a NumPy array instead of
an scalar. This has been done for compatibility with NumPy. Closes
#303.
- Optimization for `Table.copy()` so that ``FIELD_*`` attrs are not
overwritten during the copy. This can lead to speed-ups up to 100x
for short tables that have hundreds of columns. Closes #304.
- For external links, its relative paths are resolved now with respect
to the directory of the main HDF5 file, rather than with respect to
the current directory. Closes #306.
- ``Expr.setInputsRange()`` and ``Expr.setOutputRange()`` do support
``numpy.integer`` types now. Closes #285.
- Column names in tables can start with '__' now. Closes #291.
- Unicode empty strings are supported now as atributes. Addresses #307.
- Cython 0.13 and higher is supported now. Fixes #293.
**Enjoy data!**
-- The PyTables Team
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