gmane.comp.python.enthought.devel

Re: trait views

Ross Harder — 2012-05-17T22:58:33

Opps, actually found this in the archive
https://mail.enthought.com/pipermail/enthought-dev/2008-March/013446.html


Should have dug for a few more minutes before emailing, thought the hour I spent was enough to justify bugging everyone....

Ross



________________________________
 From: Adam Hughes <hugadams-X40cu4teqwPD0P1m9PE5KA< at >public.gmane.org>
To: Ross Harder <brussel13-/E1597aS9LQAvxtiuMwx3w< at >public.gmane.org>; enthought-dev-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org 
Sent: Thursday, May 17, 2012 5:43 PM
Subject: Re: [Enthought-Dev] trait views
 

Is this along the lines of what you're trying to do:

http://code.enthought.com/projects/traits/docs/html/TUIUG/advanced_view.html


On Thu, May 17, 2012 at 6:41 PM, Ross Harder <brussel13-/E1597aS9LQAvxtiuMwx3w< at >public.gmane.org> wrote:

Hi,
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Re: trait views

Adam Hughes — 2012-05-17T22:43:56

Is this along the lines of what you're trying to do:

http://code.enthought.com/projects/traits/docs/html/TUIUG/advanced_view.html

On Thu, May 17, 2012 at 6:41 PM, Ross Harder <brussel13-/E1597aS9LQAvxtiuMwx3w< at >public.gmane.org> wrote:

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trait views

Ross Harder — 2012-05-17T22:41:16

Hi,

I'd like to have a traited class define several different views of it's traits but also keep the default view of all of it's traits intact without explicitly defining that view (the real class I am trying to do this with has many traits).   Is there a simple way to keep the default, show everything, view around and also define custom views that can be incorporated into the view of a class that contains an instance of the class with tons of traits?

 Below is a simplification of what I have been trying.  

from traits.api import HasTraits, Float, Instance, Int
from traitsui.api import View, Item, InstanceEditor


class Params(HasTraits):
  thing1=Float(1.0)
  thing2=Float(2.0)
  thing3=Int(3)

  l=[Item('thing2')]
  view1=View(l)

  def default_traits_view(self):
    alltraits=[]
    for k,v in self.__dict__.iteritems():
      print k, type(self.__dict__[k]) , type(self.__dict__[k]).__name__=='int'
      alltraits.append(Item(str(k)))
    self.view_all=View(alltraits)
    return 'v

Re: ANN: ETS 4.2 released

Eraldo Pomponi — 2012-05-17T08:11:54

Thanks a lot to all of you for your effort to provide us with this amazing
set of tools ....
I'm eager to learn more about Enaml (mostly) and Encore .....

Just a bit more: for Enaml there is also the talk of Chris Colbert posted
in your blog:
http://blog.enthought.com/page/4/

while the webinar
http://www.enthought.com/repo/epd/webinars/2011-12DeclarativeUIsEnaML/ is
not accessible if
you don't have an epd account (I guess)

Cheers,
Eraldo


On Thu, May 17, 2012 at 4:38 AM, Adam Hughes <hugadams-X40cu4teqwPD0P1m9PE5KA< at >public.gmane.org>wrote:

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Re: ANN: ETS 4.2 released

Adam Hughes — 2012-05-17T02:38:55

Thanks guys.

On Wed, May 16, 2012 at 10:34 PM, Jonathan Rocher <jrocher-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

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Re: ANN: ETS 4.2 released

Jonathan Rocher — 2012-05-17T02:34:51

I would add that there is also a webinar about enaml though a few months
old as well:
http://www.enthought.com/repo/epd/webinars/2011-12DeclarativeUIsEnaML/

Jonathan

On Wed, May 16, 2012 at 9:18 PM, Corran Webster <cwebster-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

Re: ANN: ETS 4.2 released

Corran Webster — 2012-05-17T02:18:48

The basic documentation for encore is on out docs site:

http://docs.enthought.com/encore/

There are docs on Enaml there as well, but they are about 3 months out of
date, and the API has changed a lot since then - the examples are a better
place to go for how-to.

Re: ANN: ETS 4.2 released

Adam Hughes — 2012-05-17T01:57:04

I'm looking forward to learning about encore and enami.  Besides the
examples on github, is there yet any form of tutorial on these new projects?

On Wed, May 16, 2012 at 9:39 PM, Ilan Schnell <ischnell-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

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ANN: ETS 4.2 released

Ilan Schnell — 2012-05-17T01:39:27

Hello all,

I'm happy to announce that ETS 4.2 is now released.
This release adds two new projects encore and enaml
to ETS.

As usual, for convenience, I've created a single (44MB)
tarball which contains the source tarballs of all proejcts:
http://www.enthought.com/repo/ets/ALLETS-4.2.0.tar

EPD 7.3, which will be released next Wednesday, May 23rd,
will feature this ETS release.

- Ilan

Re: enpkg error

Adam Hughes — 2012-05-16T23:48:21

Oh I see, the hidden installers don't come with a subscription because the
subscription also gives access to the webinars and other features, correct?

On Wed, May 16, 2012 at 7:08 PM, Jonathan March <jmarch-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

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Re: enpkg error

Jonathan March — 2012-05-16T23:08:32



Indeed. If you subscribe, you will receive a password which can be used
with your existing installation.

Parenthetically, let me also mention that many Linux EPD users simply
install EPD into a directory to which they have full permissions.


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Re: enpkg error

Adam Hughes — 2012-05-16T21:56:43

Yes this is probably the problem.  When I installed EPD, I had put in a
request through academic use, and was sent a link to hidden installers.
Through this I never had to make an account for the repo.  Is it possible
to make a repo account after the fact?  If not, I can just reinstall EPD
7.2 fresh.

On Wed, May 16, 2012 at 4:57 PM, Robert Kern <rkern-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org> wrote:

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Re: enpkg error

Robert Kern — 2012-05-16T20:57:16

Ah, you probably don't have a ~root/.enstallerrc, so it's just looking
at the free repos. You can re-enter your authentication information as
root:

  $ sudo /usr/local/EPD/bin/enpkg --userpass

Alternately, I think

  $ sudo -E enpkg epd

will keep your current environment, but I could be misreading the man page.

Re: enpkg error

Adam Hughes — 2012-05-16T20:44:00

Thanks Robert.  I tried putting the full path in. Any idea why it would say
the following:

glue< at >glue-pc:~/Dropbox/Curve_Analysis_Traits/Curve_analysis_traits_v3$ sudo
/usr/local/EPD/bin/enpkg epd
prefix: /usr/local/EPD
No distribution found for requirement 'epd'.
EPD-7.1-2.egg was installed on: Fri Nov 11 14:28:27 2011


On Wed, May 16, 2012 at 4:35 PM, Robert Kern <rkern-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org> wrote:

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Re: Traits wrapper for pandas

Adam Hughes — 2012-05-16T20:38:08

Ah I see.  Well, I'll read over the document Jonathan sent me and see how
feasible it would be to make a HasTraits subclass.  If there are any
developers that would be interested in helping and actually have spare
time, that would be great :)

On Wed, May 16, 2012 at 4:23 PM, Corran Webster <cwebster-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

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Re: enpkg error

Robert Kern — 2012-05-16T20:35:23

Depending on how sudo is configured on your system and for your user,
the environment that the underlying command runs in may be that of
root rather than your user. Consequently, it may not have the same
$PATH. Running either

  $ sudo `which enpkg` epd

or

  $ sudo /usr/local/EPD/bin/enpkg epd

should work. You may want to look into setting your root environment
to have EPD's bin directory on $PATH, too.

Re: Traits wrapper for pandas

Corran Webster — 2012-05-16T20:23:40

Hi Adam,

The Array trait can't avoid these issues, and so doesn't even attempt to
listen to changes in the underlying memory - that's why you can't set a
listener on 'myarray_items' or similar for an Array trait.

Re: Traits wrapper for pandas

Adam Hughes — 2012-05-16T20:19:22

Thanks Corran.  I had feared that something along these lines may be an
issue.  Although I would be interested in making my own Traits subclasses,
I don't think I have the experience to do something like that.  And I would
totally be clueless about having any control at the C-level.  I read that
pandas does have a lot of optimizations at the C-level, so I really
wouldn't know what's going on there.  How does the Array trait avoid these
issues, since numpy is also optimized at the C code level?

On Wed, May 16, 2012 at 4:11 PM, Corran Webster <cwebster-SCgzsaguwNrby3iVrkZq2A< at >public.gmane.org>wrote:

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Re: Traits wrapper for pandas

Corran Webster — 2012-05-16T20:11:16

Hi Adam,

a quick comment on one thing below:

On Wed, May 16, 2012 at 2:55 PM, Adam Hughes <hugadams-X40cu4teqwPD0P1m9PE5KA< at >public.gmane.org>wrote:


Because Pandas objects are not HasTraits subclasses, Traits has no way of
listening to changes to internal state of the Pandas objects, so the only
thing you can listen to right now is if the entire object is replaced.

When you push hard enough with objects like numpy arrays and Pandas
objects, since they can contain data which is allocated in C, possibly by
code which is completely unaware of the existence of Python, values can
change inside an array or Pandas data structure without Python being aware
of it, let along Traits (the classic example of this is a memory-mapped
array, which can have any process which modifies the file it is mapped to
change the contents of the array at any time with no notification to
anyone).

If you look closely at Traits, you'll see that Traits has its own
subclasses of the basic Python container types (list, dict, set, etc.)
w

enpkg error

Adam Hughes — 2012-05-16T20:11:00

Hi,

I'm trying to use enpkg to update my EPD and I've never actually used it
before.  I'm getting the following error:

ERROR: Could not write simple file into: /usr/local/EPD

I get this error when I try "enpkg epd" or when I do just a package, for
example "enpkg numpy"

When I try sudo enpkg epd, I get:

"sudo: enpkg: command not found"

I'm using ubuntu 10.04  Has this happened to anyone else?
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Re: Traits wrapper for pandas

Adam Hughes — 2012-05-16T19:55:31


Thanks Jonathan.  I've also posted this to the pandas mailing list to see
what they think.




Very interesting!  I didn't realize that Instance took non-Trait classes as
inputs; always thought the input class of Instance had to be a pre-built
trait type.  This is very good to know.



I see.  If the pandas data structures already handle the majority of bad
input scenarios, maybe the validation step in a Trait object could be lax,
at least for now.  Of course, I'm a novice on this so I'll have to check
out the link you sent to get an idea of what validations we'd like to
program.  What I'm most concerned about right now is the listeners.  Will
the Instance calss build its own listeners so I can monitor changes in the
Series object?  That would be nice because the data and its labels will
change together so there's presumably no need to listen to these composite
pieces separately.




Indeed.  For full integration, its probably necessary to build some
structures that connect the labels/data from the pandas