How to make interact ignore arguments? #2740
Description
Hi,
Firstly, widgets are amazing.
Now, I'm trying to create an interactive plotting function with a signature like interactively_plot(data, plotfunc, **kwargs). To do that I want to pass the function I want to interact with some arguments, which interact is to ignore, e.g.
def plotfunc(data, **kwargs):
return data.plot()
def interactively_plot(data, plotfunc, **kwargs):
wrapped = functools.partial(plotfunc, data=data)
return interact(wrapped, **kwargs)However, functools.partial doesn't behave as expected in this context: interact is still demanding that data be treated as a widget.
Here's a minimum example that demonstrates my problem
from ipywidgets import interact
from functools import partial, update_wrapper
# This is to avoid the error
# AttributeError: 'functools.partial' object has no attribute '__name__'
def wrapped_partial(func, *args, **kwargs):
partial_func = partial(func, *args, **kwargs)
update_wrapper(partial_func, func)
return partial_func
def g(dat, x):
print("dat={dat} from inside g")
return dat
g_plus_dat = wrapped_partial(g, dat='a')
interact(g_plus_dat, x=10)which raises
Traceback (most recent call last):
File "/home/tegn500/Documents/Work/Code/experimentation/xwidget/mwe_partial.py", line 17, in <module>
interact(g_plus_dat, x=10)
File "/home/tegn500/anaconda3/lib/python3.7/site-packages/ipywidgets/widgets/interaction.py", line 528, in __call__
w = self.widget(f)
File "/home/tegn500/anaconda3/lib/python3.7/site-packages/ipywidgets/widgets/interaction.py", line 444, in widget
return self.cls(f, self.opts, **self.kwargs)
File "/home/tegn500/anaconda3/lib/python3.7/site-packages/ipywidgets/widgets/interaction.py", line 188, in __init__
new_kwargs = self.find_abbreviations(kwargs)
File "/home/tegn500/anaconda3/lib/python3.7/site-packages/ipywidgets/widgets/interaction.py", line 288, in find_abbreviations
raise ValueError('cannot find widget or abbreviation for argument: {!r}'.format(name))
ValueError: cannot find widget or abbreviation for argument: 'dat'
I don't understand how what I've done is different from the use of functools.partial in this answer.
I could possibly get around this by using closures, but I really would rather not. I would also eventually like to do something similar but with methods.