Oops, sent a reply too soon. On Sat, Mar 13, 2021 at 3:14 PM Eric V. Smith <e...@trueblade.com> wrote:
> The thing is, even without being able to switch back and forth within a > single dataclass, you could achieve the same thing with inheritance: > ... > > In both cases, you'd get re-ordered fields in __init__, and nowhere else: > > def __init__(c, d, *, a, b, e, f): > > repr, comparisons, etc. would still treat them in today's order: a, b, c, > d, e, f. > ... > > And the same logic would apply to positional argument fields > This seems like another disadvantage of allowing positional-only arguments. If positional-only fields show up just like keyword fields in an arbitrary position in the repr, the repr will cease to be a representation of a call to the dataclass's constructor suitable for passing to `eval`, as it is today when init-only parameters are not in use. ~Matt
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