Fastai v2 code walk-thru 2

[jeremy (Jeremy Howard)]

@bdubreu happy to answer your questions, but be sure to search the forums first! Here’s a great discussion from @radek about BypassNewMeta

Fastai v2 daily code walk-thrus

I have been looking at BypassNewMeta and what it does is very simple while at the same time completely mind blowing! class BypassNewMeta(type): "Metaclass: casts `x` to this class, initializing with `_new_meta` if available" def __call__(cls, x, *args, **kwargs): if hasattr(cls, '_new_meta'): x = cls._new_meta(x, *args, **kwargs) if cls!=x.__class__: x.__class__ = cls return x The straightforward behavior is that when we define __call__ on a class we can use an …

And remember to use the help:

Or type merge?? to see the source:

def merge(*ds):
    "Merge all dictionaries in `ds`"
    return {k:v for d in ds if d is not None for k,v in d.items()}