[Numpy-discussion] numpy pprint?

Foad Sojoodi Farimani f.s.farimani at gmail.com
Tue Nov 6 05:16:23 EST 2018


In between your lines:

On Tue, Nov 6, 2018 at 11:07 AM Mark Harfouche <mark.harfouche at gmail.com>
wrote:

> Foad,
> In response to:
>
> Thanks but I know it is very bad:
>
>    - it does not work properly for floats
>    - it only works for 1D and 2D
>    - there can be some recursive function I believe.
>
> I think this is the awesome part about being able to write 10 lines of
> code that are specified to representing exactly 1 thing.
>
> Other than that, yeah, encouraging people to transition from matlab is
> challenging. Matlab is definitely good at doing matrix operations. Python3
> somewhat helps in that regard.
>
> I'm super glad you are bringing usability issues up and working toward
> solving them.
>
> Maybe you can describe the interface for python you find practical to
> introduce to newcomers so as to motivate the discussion?
>

I have been thinking about Spyder but it has a lot of issues with the
standard python distribution and pip. Jupyterlab would be awesome except
some Jupyter Notebook extensions are missing. For example variable
inspector, RISE for slides, Hinterland, ... For the moment Jupyter Notebook
is the most reliable/complete I could find.

F.


>
> Mark
>
>
> On Tue, Nov 6, 2018 at 3:57 AM Foad Sojoodi Farimani <
> f.s.farimani at gmail.com> wrote:
>
>> Wow, this is awesome.
>> Some points though:
>>
>>    - not everybody uses IPython/Jupyter having the functionality for
>>    conventional consols would also help. something like
>>    Sypy's init_printing/init_session which smartly chooses the right
>>    representation considering the terminal.
>>    - I don't think putting everything in boxes is helping. it is
>>    confusing. I would rather having horizontal and vertical square brackets
>>    represent each nested array
>>    - it would be awesome if in IPython/Jupyter hovering over an element
>>    a popup would show the index
>>    - one could read the width and height of the terminal and other
>>    options I mentioned in reply Mark to show L R U P or combination of these
>>    plus some numbers (similar to Pandas .head .tail) methods and then show the
>>    rest by unicod 3dot
>>
>> P.S. I had no idea our university Microsoft services also offers Azure
>> Notebooks awesome :P
>>
>> F.
>>
>> On Tue, Nov 6, 2018 at 9:45 AM Eric Wieser <wieser.eric+numpy at gmail.com>
>> wrote:
>>
>>> Here's how that could look
>>>
>>>
>>> https://numpyintegration-ericwieser.notebooks.azure.com/j/notebooks/pprint.ipynb
>>>
>>> Feel free to play around and see if you can produce something more useful
>>>
>>>
>>>
>>> On Mon, 5 Nov 2018 at 23:28 Foad Sojoodi Farimani <
>>> f.s.farimani at gmail.com> wrote:
>>>
>>>> It is not highking if I asked for it :))
>>>> for IPython/Jupyter using Markdown/LaTeX would be awesome
>>>> or even better using HTML to add sliders just like Pandas...
>>>>
>>>> F.
>>>>
>>>> On Tue, Nov 6, 2018 at 6:51 AM Eric Wieser <wieser.eric+numpy at gmail.com>
>>>> wrote:
>>>>
>>>>> Hijacking this thread while on the topic of pprint - we might want to
>>>>> look into a table-based `_html_repr_` or `_latex_repr_` for use in ipython
>>>>> - where we can print the full array and let scrollbars replace ellipses.
>>>>>
>>>>> Eric
>>>>>
>>>>> On Mon, 5 Nov 2018 at 21:11 Mark Harfouche <mark.harfouche at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Foad,
>>>>>>
>>>>>> Visualizing data is definitely a complex field. I definitely feel
>>>>>> your pain.
>>>>>> Printing your data is but one way of visualizing it, and probably
>>>>>> only useful for very small and constrained datasets.
>>>>>> Have you looked into set_printoptions
>>>>>> <https://docs.scipy.org/doc/numpy-1.15.1/reference/generated/numpy.set_printoptions.html>
>>>>>> to see how numpy’s existing capabilities might help you with your
>>>>>> visualization?
>>>>>>
>>>>>> The code you showed seems quite good. I wouldn’t worry about
>>>>>> performance when it comes to functions that will seldom be called in tight
>>>>>> loops.
>>>>>> As you’ll learn more about python and numpy, you’ll keep expanding it
>>>>>> to include more use cases.
>>>>>> For many of my projects, I create small submodules for visualization
>>>>>> tailored to the specific needs of the particular project.
>>>>>> I’ll try to incorporate your functions and see how I use them.
>>>>>>
>>>>>> Your original post seems to have some confusion about C Style vs F
>>>>>> Style ordering. I hope that has been resolved.
>>>>>> There is also a lot of good documentation
>>>>>>
>>>>>> https://docs.scipy.org/doc/numpy/user/numpy-for-matlab-users.html#numpy-for-matlab-users-notes
>>>>>> about transitioning from matlab.
>>>>>>
>>>>>> Mark
>>>>>>
>>>>>> On Mon, Nov 5, 2018 at 4:46 PM Foad Sojoodi Farimani <
>>>>>> f.s.farimani at gmail.com> wrote:
>>>>>>
>>>>>>> Hello everyone,
>>>>>>>
>>>>>>> Following this question
>>>>>>> <https://stackoverflow.com/q/53126305/4999991>, I'm convinced that
>>>>>>> numpy ndarrays are not MATLAB/mathematical multidimentional matrices and I
>>>>>>> should stop expecting them to be. However I still think it would have a lot
>>>>>>> of benefit to have a function like sympy's pprint to pretty print.
>>>>>>> something like pandas .head and .tail method plus  .left .right .UpLeft
>>>>>>> .UpRight .DownLeft .DownRight methods. when nothing mentioned it would show
>>>>>>> 4 corners and put dots in the middle if the array is to big for the
>>>>>>> terminal.
>>>>>>>
>>>>>>> Best,
>>>>>>> Foad
>>>>>>> _______________________________________________
>>>>>>> NumPy-Discussion mailing list
>>>>>>> NumPy-Discussion at python.org
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>>>>>>>
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