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Interactive data exploration with Altair

License: BSD 3-Clause "New" or "Revised" License

Makefile 2.31% Python 53.49% Jupyter Notebook 44.20%

visualization jupyter-widget

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sanga amit-dingare awesome-python codeaudit joshuac3 cornhundred gridl chmduquesne fagan2888 codeit awoziji alihussainia bartcardi

altair_widgets's Issues

Create interface to select initial columns to display

via interact_with(df, initial: list[Union(str, dict)]). Each element in initial can either be a str representing the column name or a dict representing the settings.

Add support for linear/log scales

It'd be nice to have an option for linear/log scales.

This will likely using
Chart(df).mark_point().encode(x=X('col', aggregate='mean', type='quantitive') instead of Chart(df).mark_point().encode(x='mean(col:Q)').

This is mentioned in https://altair-viz.github.io/documentation/encoding.html#encoding-shorthands

Show Python code to generate chart

...with Chart.to_altair

Showing a new plot takes a long time

On my machine, updating takes 2.4 seconds. This happens anytime a button is pressed. This is really annoying.

Menus/etc in "options" don't display current setting

...because they don't read the current encoding settings in. They should read in the appropriate value from self.settings and set menu.value to that appropriate value.

This is related to the issue of showing the default value of these parameters.

This is a significant user interface issue -- I ran into an issue where I changed the scale to "log" and wanted to go back to "linear"... so I kept on selecting "linear". This didn't have any effect because the callback is only called when menu.value changes.

Advanced options are disabled

The options button is disabled:

This has some practical effects – for example, setting an axis to type=log can't be done.

Does not work with ipywidgets 7.4.0 and altair 2.2.2

When running

interact_with(iris)

I get the following output

TypeError                                 Traceback (most recent call last)
<ipython-input-1-1ad553e9f0bc> in <module>()
      8 
      9 from altair_widgets import interact_with
---> 10 interact_with(iris)

~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair_widgets/widget.py in interact_with(df, ndims, **kwargs)
     26 
     27     """
---> 28     return Interact(df, ndims=ndims, **kwargs)
     29 
     30 

~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair_widgets/widget.py in __init__(self, df, ndims, show)
     56             display(self.controller)
     57 
---> 58         self.plot(show=show)
     59 
     60     def _show_advanced(self, button, disable=1):

~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair_widgets/widget.py in plot(self, show)
    168         mark = mark_opts.pop('mark')
    169         Chart_mark = getattr(altair.Chart(self.df), mark)
--> 170         self.chart = Chart_mark(**mark_opts).encode(**kwargs)
    171         if show and self.show:
    172             clear_output()

~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair/vegalite/v2/api.py in encode(self, *args, **kwargs)
   1238                 if condition is not Undefined:
   1239                     obj['condition'] = _wrap_in_channel_class(condition, prop)
-> 1240             kwargs[prop] = _wrap_in_channel_class(obj, prop)
   1241 
   1242 

~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair/vegalite/v2/api.py in _wrap_in_channel_class(obj, prop)
   1214                 return [_wrap_in_channel_class(subobj, prop) for subobj in obj]
   1215 
-> 1216             if 'value' in obj:
   1217                 clsname += 'Value'
   1218 

TypeError: argument of type 'NoneType' is not iterable

If I then click on the button "Options", I get additional errors:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~/code/perso/notebooks/data-science-exercises/venv/lib/python3.7/site-packages/altair_widgets/widget.py in _show_advanced(self, button, disable)
     84             c.observe(self._update, names='value')
     85 
---> 86         visible = self.controller.children[row].children[-1].visible
     87         self.controller.children[row].children[disable].disabled = not visible
     88         self.controller.children[row].children[-1].visible = not visible

AttributeError: 'VBox' object has no attribute 'visible'

Any ideas?
Many thanks!

Use a MVC framework

This is a simplification, and will allow easier testing.

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