New submission from Кирилл Чуркин <pirotec...@gmail.com>:

I found a problem when use inherit dataclasses.
When I define parent dataclass with field(s) with default (or default_factory) 
properties, and inherit child dataclass from parent, i define non-default field 
in it and got `TypeError('non-default argument {f.name!r} follows default 
argument')` in dataclasses.py(466)._init_fn. It happens because dataclass 
constructor defines all parent class fields as arguments in __init__ class and 
then all child class fields.
Maybe it need to define all non-default fields in init before all default.

----------
messages: 336297
nosy: Кирилл Чуркин
priority: normal
severity: normal
status: open
title: Inheritance dataclasses fields and default init statement
type: behavior
versions: Python 3.7

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36077>
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