add dataclass_transform #1054
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add dataclass_transform #1054
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srittau
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Feb 2, 2022
debonte
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Feb 2, 2022
| """ | ||
| def decorator(cls_or_fn): | ||
| cls_or_fn.__dataclass_transform__ = { |
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Do we need to use this pattern used in final?
try:
f.__final__ = True
except (AttributeError, TypeError):
# Skip the attribute silently if it is not writable.
# AttributeError happens if the object has __slots__ or a
# read-only property, TypeError if it's a builtin class.
pass
return f
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I was more careful there because we added the behavior later after the decorator was already in the wild, and I didn't want to accidentally break something. Here, we're adding a new decorator, so I think it makes sense to start with the simpler behavior and adjust it only if there's an actual need.
Co-authored-by: Erik De Bonte <[email protected]>
debonte
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Feb 2, 2022
JelleZijlstra
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Apr 23, 2022
Copied from typing-extensions (python/typing#1054, python/typing#1120). Documentation is intentionally omitted, so we can focus on getting the runtime part in before the feature freeze.
JelleZijlstra
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Copied from typing-extensions (python/typing#1054, python/typing#1120). Documentation is intentionally omitted, so we can focus on getting the runtime part in before the feature freeze.
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From PEP 681.
cc @erictraut @debonte