[issue37485] dataclass __foo__ methods inheritance is not working

[Colin]

New submission from Colin <colin.bounouar at gmail.com>:

Hi,

When using inheritance with dataclass, "standard" instance methods that are provided with a default behavior thanks to dataclass are not overridable using inheritance.

Please see the sample below (or the attached file):

import dataclasses


@dataclasses.dataclass
class A:
    def __eq__(self, other):
        return True


@dataclasses.dataclass
class B(A):
    pass


print(A() == 1) # Returns True as expected
print(B() == 1) # Returns False instead of True as expected via inheritance


Thanks again

----------
components: Library (Lib)
files: inheritance_dataclass_issue.py
messages: 347142
nosy: colin-b
priority: normal
severity: normal
status: open
title: dataclass __foo__ methods inheritance is not working
type: behavior
versions: Python 3.7
Added file: https://bugs.python.org/file48453/inheritance_dataclass_issue.py

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<https://bugs.python.org/issue37485>
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