This is part of PEP 487 and the descriptor protocol.
(cherry picked from commit de7a2f04d6)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
* Change _hash_action to be a function table lookup, instead of a list
of strings which is then tested with if statements.
(cherry picked from commit 01d618c560)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
- When adding a single element to a list, use .append() instead of
+= and creating a new list.
- For consistency, import the copy module, instead of just deepcopy. This
leaves only a module at the class level, instead of a function.
- Improve some comments.
- Improve some whitespace.
- Use tuples instead of lists.
- Simplify a test.
(cherry picked from commit f96ddade00)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
If a dataclass has a member variable that's of type Field, but it doesn't have a type annotation, raise TypeError.
(cherry picked from commit 56970b8ce9)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
- Add missing 'Field' to __all__.
- Improve tests to catch this.
(cherry picked from commit 8e4560a9da)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
Fix the way that new annotations in a class are detected.
(cherry picked from commit 8f6eccdc64)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
If the class has a member that's a MemberDescriptorType, it's not a default value, it's from that member being in __slots__.
(cherry picked from commit 7389fd935c)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
If a non-dataclass derives from a frozen dataclass, allow attributes to be set.
Require either all of the dataclasses in a class hierarchy to be frozen, or all non-frozen.
Store `@dataclass` parameters on the class object under `__dataclass_params__`. This is needed to detect frozen base classes.
(cherry picked from commit f199bc655e)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
This restriction will be relaxed at a future date.
(cherry picked from commit 2fa6b9eae0)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
unsafe_hash=False is now the default. It is the same behavior as the old hash=None parameter. unsafe_hash=True will try to add __hash__. If it already exists, TypeError is raised.
(cherry picked from commit dbf9cff48a)
Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
Class authors no longer need to specify repr=False if they want to provide a custom __repr__ for dataclasses. The same thing applies for the other dunder methods that the dataclass decorator adds. If dataclass finds that a dunder methods is defined in the class, it will not overwrite it.
Miss Islington (bot)
Eric V. Smith
Ivan Levkivskyi
Raymond Hettinger