[IPython-dev] problem with publish_display_data?

MinRK benjaminrk@gmail....
Wed Jun 13 20:56:05 CDT 2012


On Wed, Jun 13, 2012 at 6:51 PM, Jonathan Taylor <
jonathan.taylor@stanford.edu> wrote:

> I was a little confused because sometimes it displays several things.


When have you seen multiple displays from one display call?  This would be
a bug.


> The idea with having several values in the dict is that they might be
> different representations of the same output?


Precisely. One call == one thing to display.


>
>
> On Wed, Jun 13, 2012 at 4:08 PM, MinRK <benjaminrk@gmail.com> wrote:
>
>>
>>
>> On Wed, Jun 13, 2012 at 3:52 PM, Jonathan Taylor <
>> jonathan.taylor@stanford.edu> wrote:
>>
>>> On the master branch, I am getting some unexpected behaviour when I try
>>> the following
>>>
>>> import numpy as np
>>> from IPython.core.displaypub import publish_display_data
>>>
>>> class NormalMean(object):
>>>     """
>>>     Sample from N(mean, sd) independently n times
>>>     """
>>>     tol = 5.e-2
>>>     checkable = True
>>>
>>>     def __init__(self, mean, sd, n, identifier):
>>>         self.mean = mean
>>>         self.identifier = identifier
>>>         self.sd = sd
>>>         self.n = n
>>>         self.sequence = self.generate()
>>>         self.correct_answer = np.mean(self.sequence)
>>>
>>>     def generate(self):
>>>         return np.round(np.random.standard_normal(self.n), 1) * self.sd+ self.mean
>>>
>>>     @property
>>>     def answer(self):
>>>         return np.mean(self.sequence)
>>>
>>>     def publish(self, return_data=False):
>>>
>>>         data = {'text/latex': r"What is the sample mean, $\bar{X}$ of
>>> this sequence: %s ?" % `["%0.1f" % s for s in self.sequence]`,
>>>                 'text/html': ''}
>>>
>>>         data['text/html'] += '<form method="post" name=%s ><p><input
>>> type="text" ></p></form>' % self.identifier
>>>         data['application/json'] = {'constructor_info': ('normal_mean',
>>> [self.mean, self.sd, self.n], {})}
>>>         publish_display_data("NormalMean", data)
>>>         if return_data:
>>>             return data
>>>
>>>     def check_answer(self, answer):
>>>         if np.fabs(answer - self.correct_answer) / np.std(self.sequence)
>>> < self.tol:
>>>             data = self.publish(return_data=True)
>>>             data['text/html'] += '\n<p><h2>Good job!</h2></p>\n'
>>>         else:
>>>             self.sequence = self.generate()
>>>             data = self.publish(return_data=True)
>>>             data['text/html'] += '\n<p><h2>Try Again!</h2></p>\n'
>>>
>>>
>>> NormalMean(10, 3, 6, 'mean_10_sd_3_n_6').publish()
>>>
>>>
>>> I expect to see a latex rendering of the question with a textbox below
>>> it but I am only getting a text box.
>>>
>>> By the way, if I want to see these things in order, I suppose it is best
>>> to use several calls to publish_display_data? Is that right, if so the
>>> outputs are in the order I want them to be rather than
>>> the order of the dict keys (which I cannot control).
>>>
>>
>> Right - one call to "publish_display_data" should always result in
>> exactly one thing being displayed.  The idea being "I have a thing I want
>> to display, and I can display in all these different ways". It is up to the
>> frontends to pick their favorite (HTML in the notebook).  If you want to
>> display multiple things, then you should use multiple calls.
>>
>> -MinRK
>>
>>
>>>
>>> Thanks,
>>>
>>> Jonathan
>>>
>>>
>>> --
>>> Jonathan Taylor
>>> Dept. of Statistics
>>> Sequoia Hall, 137
>>> 390 Serra Mall
>>> Stanford, CA 94305
>>> Tel:   650.723.9230
>>> Fax:   650.725.8977
>>> Web: http://www-stat.stanford.edu/~jtaylo
>>>
>>> _______________________________________________
>>> IPython-dev mailing list
>>> IPython-dev@scipy.org
>>> http://mail.scipy.org/mailman/listinfo/ipython-dev
>>>
>>>
>>
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>>
>>
>
>
> --
> Jonathan Taylor
> Dept. of Statistics
> Sequoia Hall, 137
> 390 Serra Mall
> Stanford, CA 94305
> Tel:   650.723.9230
> Fax:   650.725.8977
> Web: http://www-stat.stanford.edu/~jtaylo
>
> _______________________________________________
> IPython-dev mailing list
> IPython-dev@scipy.org
> http://mail.scipy.org/mailman/listinfo/ipython-dev
>
>
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