See https://bugs.python.org/issue33129. I've not done much with this
issue, because I'm not crazy about the API, and I'd like to do something
with positionally-only arguments at the same time. But I think in
general it's a good idea.
Eric
On 1/24/2021 3:07 PM, Paul Bryan via Python-ideas wrote:
The main benefits of this proposal:
- the order of fields (those with defaults, those without) is irrelevant
- don't need to pedantically add default = None for Optional values
On Sun, 2021-01-24 at 19:46 +0000, Paul Bryan via Python-ideas wrote:
I've created a helper class in my own library that enhances the
existing dataclass:
a) __init__ accepts keyword-only arguments,
b) Optional[...] attribute without a specified default value would
default to None in __init__.
I think this could be useful in stdlib. I'm thinking a dataclass
decorator parameter like "init_kwonly" (default=False to provide
backward compatibility) that if True would implement this behavior.
Thoughts?
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