[Numpy-discussion] [ANN] New open source project for labeled arrays

Wes McKinney wesmckinn at gmail.com
Wed Jan 27 21:33:32 EST 2010

On Wed, Jan 27, 2010 at 9:10 PM, Keith Goodman <kwgoodman at gmail.com> wrote:
> I recently opened sourced one of my packages. It is a labeled array
> that I call larry.
> A two-dimensional larry, for example, contains a 2d NumPy array with
> labels on each row and column. A larry can have any dimension.
> Alignment by label is automatic when you add (or subtract, multiply,
> divide) two larrys.
> larry has built-in methods such as movingsum, ranking, merge, shuffle,
> zscore, demean, lag as well as typical NumPy methods like sum, max,
> std, sign, clip. NaNs are treated as missing data.
> You can archive larrys in HDF5 format using save and load or using a
> dictionary-like interface.
> I'm working towards a 0.1 release. In the meantime, comments,
> suggestions, critiques are all appreciated.
> To use larry you need Python and NumPy 1.4 or newer. To save and load
> larrys in HDF5 format, you need h5py with HDF5 1.8.
> larry currently contains no extensions, just Python code, so there is
> nothing to compile. Just save the la package and make sure Python can
> find it.
> docs  http://larry.sourceforge.net
> code  https://launchpad.net/larry
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Cool! Thanks for releasing.

Looks like you're solving some similar problems to the ones I built
pandas for (http://pandas.sourceforge.net). I'll have to have a closer
look at the implementation to see if there are some design
commonalities we can benefit from.

- Wes

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