# PyWavelets 0.3.0 Release Notes

Contents

- PyWavelets 0.3.0 Release Notes

  - New features

    - Test suite

    - n-D Inverse Discrete Wavelet Transform

    - Thresholding

  - Backwards incompatible changes

  - Other changes

  - Authors

    - Issues closed for v0.3.0

    - Pull requests for v0.3.0

PyWavelets 0.3.0 is the first release of the package in 3 years. It is the result of a significant effort of a growing development team to modernize the package, to provide Python 3.x support and to make a start with providing new features as well as improved performance. A 0.4.0 release will follow shortly, and will contain more significant new features as well as changes/deprecations to streamline the API.

This release requires Python 2.6, 2.7 or 3.3-3.5 and NumPy 1.6.2 or greater.

Highlights of this release include:

- Support for Python 3.x (>=3.3)

- Added a test suite (based on nose, coverage up to 61% so far)

- Maintenance work: C style complying to the Numpy style guide, improved templating system, more complete docstrings, pep8/pyflakes compliance, and more.

## New features

### Test suite

The test suite can be run with `nosetests pywt` or with:

    >>> import pywt
    >>> pywt.test()

### n-D Inverse Discrete Wavelet Transform

The function `pywt.idwtn`, which provides n-dimensional inverse DWT, has been added. It complements `idwt`, `idwt2` and `dwtn`.

### Thresholding

The function pywt.threshold has been added. It unifies the four thresholding functions that are still provided in the `pywt.thresholding` namespace.

## Backwards incompatible changes

None in this release.

## Other changes

Development has moved to a new repo. Everyone with an interest in wavelets is welcome to contribute!

Building wheels, building with `python setup.py develop` and many other standard ways to build and install PyWavelets are supported now.

## Authors

- Ankit Agrawal +

- François Boulogne +

- Ralf Gommers +

- David Menéndez Hurtado +

- Gregory R. Lee +

- David McInnis +

- Helder Oliveira +

- Filip Wasilewski

- Kai Wohlfahrt +

A total of 9 people contributed to this release. People with a “+” by their names contributed a patch for the first time. This list of names is automatically generated, and may not be fully complete.

### Issues closed for v0.3.0

- #3: Remove numerix compat layer

- #4: Add single code base Python 3 support

- #5: PEP8 issues

- #6: Migrate tests to nose

- #7: Expand test coverage without Matlab to a reasonable level

- #8: Replace custom C templates by Numpy’s templating system

- #9: Replace Cython templates by fused types

- #10: Replace use of __array_interface__ with Cython’s memoryviews

- #11: Format existing docstrings in numpydoc format.

- #12: Complete docstrings, they’re quite sparse right now

- #13: Reorganize source tree

- #24: doc/source/regression should be moved

- #27: Broken test: test_swt_decomposition

- #28: Install issue, no module tools.six

- #29: wp.update fails after removal of nodes

- #32: wp.update fails on 2D

- #34: Wavelet string attributes shouldn’t be bytes in Python 3

- #35: Re-enable float32 support

- #36: wavelet instance vs string

- #40: Test with Numpy 1.8rc1

- #45: demos should be updated and integrated in docs

- #60: Moving pywt forward faster

- #61: issues to address in moving towards 0.3.0

- #71: BUG: _pywt.downcoef always returns level=1 result

### Pull requests for v0.3.0

- #1: travis: check all branches + fix URL

- #17: [DOC] doctrings for multilevel functions

- #18: DOC: format -> functions.py

- #20: MAINT: remove unnecessary zero() copy()

- #21: Doc wavelet_packets

- #22: Minor doc fixes

- #25: TEST: remove useless functions and use numpy instead

- #26: Merge most recent work

- #30: Adding test for wp.rst

- #41: Change to Numpy templating system

- #43: MAINT: update six.py to not use lazy loading.

- #49: Taking on API Issues

- #50: Add idwtn

- #53: readme updated with info related to Py3 version

- #63: Remove six

- #65: Thresholding

- #70: MAINT: PEP8 fixes

- #72: BUG: fix _downcoef for level > 1

- #73: MAINT: documentation and metadata update for repo fork

- #74: STY: fix pep8/pyflakes issues

- #77: MAINT: raise ValueError if data given to dwt or idwt is not 1D…