[issue35761] Allow dataclasses to be updated in place

[Eric V. Smith]

Eric V. Smith <eric at trueblade.com> added the comment:

What would the interaction be between other_instance and changes? Why is this API different from .replace()?

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assignee:  -> eric.smith
nosy: +eric.smith

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35761>
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