add hackability to use_kwargs_dict

[marii-moe]

To support the 'val_'+kwargs here: fastai/fastai#3133

Idea is to allow a little bit of hack-ability to use_kwargs_dict instead of writing special delegates function for my one off use case. Maybe not a good idea?

_wrap is reproducing the behavior in delegates, didn't want to change the default behavior of use_kwargs_dict, as I am not very familiar with its usage. _wrap allows the stacking of multiple use_kwargs_dict or delegates when keep=True, otherwise they would error when **kwargs is removed by first delegates`use_kwargs_dict`. (tests should make this more clear).

Mostly looking for guidance here on if this makes sense, or if I should try something else. Here is example usage for easy reference:

@use_kwargs_dict(y=1,z=None)
@use_kwargs_dict(x=2,wrap=True,keep=True)
def foo(a, b=1, **kwargs): pass

test_sig(foo, '(a, b=1, *, x=2, y=1, z=None)')

@use_kwargs_dict(**{ 'val_'+k:v for k,v in get_kwargs_dict(foo).items()})
@use_kwargs_dict(**get_kwargs_dict(foo),wrap=True,keep=True)
def goo(g=4, **kwargs): pass

test_sig(goo, '(g=4, *, b=1, x=2, y=1, z=None, val_b=1, val_x=2, val_y=1, val_z=None)')

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB