Mailman 3 April 2013 - Pandas-dev

Cutting an 0.11 RC today?
by Wes McKinney April 12, 2013

April 12, 2013

Any objections? I'll wait a few hours for some of the perf issues to shake out. - Wes

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On merging new APIs into pandas
by yoval p. April 8, 2013

April 8, 2013

Hi, >From time to time, new ideas for user APIs pop up on the issue tracker. some are wacky and experimental, some a bade idea, and some genuinely useful to users. Adding user APIs is possibly the most sensitive type of change because you only get one shot at getting it right before it becomes legacy you have to support in existing code, so getting a form/functionality/signature right is a real concern. Also, whenever you add a new one , you "burn" a verb, since you replace it's meaning down the line without unacceptable confusion, so if you're targetting a "big one" like "choose" or "pick" or "grep", you had better be damn sure you got it right. Because of these reasons, I'm obviously hesitant to introduce new APIs without a reasonable amount of discussion and concensus, and to be honest, an ok from wes. OTOH, I think there are good ideas stagnating on the issue tracker because we don't have an accepted way (ad-hoc, light, but known and sanctioned by wes) for making these types of "crucial" changes. I'd like a couple of things to happen: 1) we should introduce a "sandbox" formalism, for shipping experimental new features in a release while retaining the freedom to make breaking changes when/if they are rolled back into the "official" API, this could be backed by a pd.option.sandbox.enable_foo = True mechanism 2) Would be glad to hear from wes on what he considers an acceptable way to get new APIs in. Cheers, Yoval

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Anyone tested pandas on ARM ever?
by Stephen Lin April 7, 2013

April 7, 2013

Just curious -- I am setting up an ARM environment for an ARM-specific llvm/clang patch I'm working on. Might be interesting to port pandas over, too, if it doesn't work already...the architecture is getting more and more important these days. Stephen

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0.11 timetable
by Jeff Reback April 7, 2013

April 7, 2013

Wes any thoughts on timetable? a number d issues left but most can prob be bumped to 0.12?

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Script to set up fresh Python 2.7/3.2 virtual build environments on Ubuntu (tested on 12.04.2 LTS)
by Stephen Lin April 7, 2013

April 7, 2013

Hi all, I've set up a new development machine lately and decided to write all the steps down as a script in order to make it easier to reproduce later. I've decided to contribute it to the list in case anyone else finds it helpful. It's tested to work unattended on a fresh Ubuntu 12.04.2 LTS installs (32-bit and 64-bit), and should be useful for other distributions as well with some modifications. There are two optional parameters, first the username for the pandas fork to check out, and second the username for the vbench fork to check out; pydata versions are used if the latter or both are omitted. Also, it sets up .env2.7 and .env3.2 virtualenv directories as subdirectories of the checked out pandas directory and installs necessary dependencies into them in the correct order (which should all succeed since the necessary system-wide c libraries are first installed via apt-get.) Some optional dependencies are omitted in the 3.2 environment since they don't seem to build correctly and I didn't spend much time trying to fix them. There's basically no error checking, but it shouldn't do anything that could clobber anything in case any intermediate steps fail: probably best to run it with stdout and stderr both tee'ed to a log file just in case, though, and/or more checks if you're not using directly on 12.04.2 LTS. Stephen ---------- Forwarded message ---------- From: Stephen Lin <stephenwlin(a)gmail.com> Date: Wed, Apr 3, 2013 at 4:02 PM Subject: To: stephenwlin(a)gmail.com

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