Pin attrs to latest version 19.3.0 #7135

pyup-bot · 2020-03-30T10:57:41Z

This PR pins attrs to the latest release 19.3.0.

Changelog

19.3.0

-------------------

Changes
^^^^^^^

- Fixed ``auto_attribs`` usage when default values cannot be compared directly with ``==``, such as ``numpy`` arrays.
`585 &lt;https://github.com/python-attrs/attrs/issues/585&gt;`_


----

19.2.0

-------------------

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Removed deprecated ``Attribute`` attribute ``convert`` per scheduled removal on 2019/1.
This planned deprecation is tracked in issue `307 &lt;https://github.com/python-attrs/attrs/issues/307&gt;`_.
`504 &lt;https://github.com/python-attrs/attrs/issues/504&gt;`_
- ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` do not consider subclasses comparable anymore.

This has been deprecated since 18.2.0 and was raising a ``DeprecationWarning`` for over a year.
`570 &lt;https://github.com/python-attrs/attrs/issues/570&gt;`_


Deprecations
^^^^^^^^^^^^

- The ``cmp`` argument to ``attr.s()`` and ``attr.ib()`` is now deprecated.

Please use ``eq`` to add equality methods (``__eq__`` and ``__ne__``) and ``order`` to add ordering methods (``__lt__``, ``__le__``, ``__gt__``, and ``__ge__``) instead – just like with `dataclasses &lt;https://docs.python.org/3/library/dataclasses.html&gt;`_.

Both are effectively ``True`` by default but it&#39;s enough to set ``eq=False`` to disable both at once.
Passing ``eq=False, order=True`` explicitly will raise a ``ValueError`` though.

Since this is arguably a deeper backward-compatibility break, it will have an extended deprecation period until 2021-06-01.
After that day, the ``cmp`` argument will be removed.

``attr.Attribute`` also isn&#39;t orderable anymore.
`574 &lt;https://github.com/python-attrs/attrs/issues/574&gt;`_


Changes
^^^^^^^

- Updated ``attr.validators.__all__`` to include new validators added in `425`_.
`517 &lt;https://github.com/python-attrs/attrs/issues/517&gt;`_
- Slotted classes now use a pure Python mechanism to rewrite the ``__class__`` cell when rebuilding the class, so ``super()`` works even on environments where ``ctypes`` is not installed.
`522 &lt;https://github.com/python-attrs/attrs/issues/522&gt;`_
- When collecting attributes using ``attr.s(auto_attribs=True)``, attributes with a default of ``None`` are now deleted too.
`523 &lt;https://github.com/python-attrs/attrs/issues/523&gt;`_,
`556 &lt;https://github.com/python-attrs/attrs/issues/556&gt;`_
- Fixed ``attr.validators.deep_iterable()`` and ``attr.validators.deep_mapping()`` type stubs.
`533 &lt;https://github.com/python-attrs/attrs/issues/533&gt;`_
- ``attr.validators.is_callable()`` validator now raises an exception ``attr.exceptions.NotCallableError``, a subclass of ``TypeError``, informing the received value.
`536 &lt;https://github.com/python-attrs/attrs/issues/536&gt;`_
- ``attr.s(auto_exc=True)`` now generates classes that are hashable by ID, as the documentation always claimed it would.
`543 &lt;https://github.com/python-attrs/attrs/issues/543&gt;`_,
`563 &lt;https://github.com/python-attrs/attrs/issues/563&gt;`_
- Added ``attr.validators.matches_re()`` that checks string attributes whether they match a regular expression.
`552 &lt;https://github.com/python-attrs/attrs/issues/552&gt;`_
- Keyword-only attributes (``kw_only=True``) and attributes that are excluded from the ``attrs``&#39;s ``__init__`` (``init=False``) now can appear before mandatory attributes.
`559 &lt;https://github.com/python-attrs/attrs/issues/559&gt;`_
- The fake filename for generated methods is now more stable.
It won&#39;t change when you restart the process.
`560 &lt;https://github.com/python-attrs/attrs/issues/560&gt;`_
- The value passed to ``attr.ib(repr=…)`` can now be either a boolean (as before) or a callable.
That callable must return a string and is then used for formatting the attribute by the generated ``__repr__()`` method.
`568 &lt;https://github.com/python-attrs/attrs/issues/568&gt;`_
- Added ``attr.__version_info__`` that can be used to reliably check the version of ``attrs`` and write forward- and backward-compatible code.
Please check out the `section on deprecated APIs &lt;http://www.attrs.org/en/stable/api.htmldeprecated-apis&gt;`_ on how to use it.
`580 &lt;https://github.com/python-attrs/attrs/issues/580&gt;`_

.. _`425`: https://github.com/python-attrs/attrs/issues/425


----

19.1.0

-------------------

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Fixed a bug where deserialized objects with ``cache_hash=True`` could have incorrect hash code values.
This change breaks classes with ``cache_hash=True`` when a custom ``__setstate__`` is present.
An exception will be thrown when applying the ``attrs`` annotation to such a class.
This limitation is tracked in issue `494 &lt;https://github.com/python-attrs/attrs/issues/494&gt;`_.
`482 &lt;https://github.com/python-attrs/attrs/issues/482&gt;`_


Changes
^^^^^^^

- Add ``is_callable``, ``deep_iterable``, and ``deep_mapping`` validators.

* ``is_callable``: validates that a value is callable
* ``deep_iterable``: Allows recursion down into an iterable,
 applying another validator to every member in the iterable
 as well as applying an optional validator to the iterable itself.
* ``deep_mapping``: Allows recursion down into the items in a mapping object,
 applying a key validator and a value validator to the key and value in every item.
 Also applies an optional validator to the mapping object itself.

You can find them in the ``attr.validators`` package.
`425`_
- Fixed stub files to prevent errors raised by mypy&#39;s ``disallow_any_generics = True`` option.
`443 &lt;https://github.com/python-attrs/attrs/issues/443&gt;`_
- Attributes with ``init=False`` now can follow after ``kw_only=True`` attributes.
`450 &lt;https://github.com/python-attrs/attrs/issues/450&gt;`_
- ``attrs`` now has first class support for defining exception classes.

If you define a class using ``attr.s(auto_exc=True)`` and subclass an exception, the class will behave like a well-behaved exception class including an appropriate ``__str__`` method, and all attributes additionally available in an ``args`` attribute.
`500 &lt;https://github.com/python-attrs/attrs/issues/500&gt;`_
- Clarified documentation for hashing to warn that hashable objects should be deeply immutable (in their usage, even if this is not enforced).
`503 &lt;https://github.com/python-attrs/attrs/issues/503&gt;`_


----

18.2.0

-------------------

Deprecations
^^^^^^^^^^^^

- Comparing subclasses using ``&lt;``, ``&gt;``, ``&lt;=``, and ``&gt;=`` is now deprecated.
The docs always claimed that instances are only compared if the types are identical, so this is a first step to conform to the docs.

Equality operators (``==`` and ``!=``) were always strict in this regard.
`394 &lt;https://github.com/python-attrs/attrs/issues/394&gt;`_


Changes
^^^^^^^

- ``attrs`` now ships its own `PEP 484 &lt;https://www.python.org/dev/peps/pep-0484/&gt;`_ type hints.
Together with `mypy &lt;http://mypy-lang.org&gt;`_&#39;s ``attrs`` plugin, you&#39;ve got all you need for writing statically typed code in both Python 2 and 3!

At that occasion, we&#39;ve also added `narrative docs &lt;https://www.attrs.org/en/stable/types.html&gt;`_ about type annotations in ``attrs``.
`238 &lt;https://github.com/python-attrs/attrs/issues/238&gt;`_
- Added *kw_only* arguments to ``attr.ib`` and ``attr.s``, and a corresponding *kw_only* attribute to ``attr.Attribute``.
This change makes it possible to have a generated ``__init__`` with keyword-only arguments on Python 3, relaxing the required ordering of default and non-default valued attributes.
`281 &lt;https://github.com/python-attrs/attrs/issues/281&gt;`_,
`411 &lt;https://github.com/python-attrs/attrs/issues/411&gt;`_
- The test suite now runs with ``hypothesis.HealthCheck.too_slow`` disabled to prevent CI breakage on slower computers.
`364 &lt;https://github.com/python-attrs/attrs/issues/364&gt;`_,
`396 &lt;https://github.com/python-attrs/attrs/issues/396&gt;`_
- ``attr.validators.in_()`` now raises a ``ValueError`` with a useful message even if the options are a string and the value is not a string.
`383 &lt;https://github.com/python-attrs/attrs/issues/383&gt;`_
- ``attr.asdict()`` now properly handles deeply nested lists and dictionaries.
`395 &lt;https://github.com/python-attrs/attrs/issues/395&gt;`_
- Added ``attr.converters.default_if_none()`` that allows to replace ``None`` values in attributes.
For example ``attr.ib(converter=default_if_none(&quot;&quot;))`` replaces ``None`` by empty strings.
`400 &lt;https://github.com/python-attrs/attrs/issues/400&gt;`_,
`414 &lt;https://github.com/python-attrs/attrs/issues/414&gt;`_
- Fixed a reference leak where the original class would remain live after being replaced when ``slots=True`` is set.
`407 &lt;https://github.com/python-attrs/attrs/issues/407&gt;`_
- Slotted classes can now be made weakly referenceable by passing ``attr.s(weakref_slot=True)``.
`420 &lt;https://github.com/python-attrs/attrs/issues/420&gt;`_
- Added *cache_hash* option to ``attr.s`` which causes the hash code to be computed once and stored on the object.
`426 &lt;https://github.com/python-attrs/attrs/issues/426&gt;`_
- Attributes can be named ``property`` and ``itemgetter`` now.
`430 &lt;https://github.com/python-attrs/attrs/issues/430&gt;`_
- It is now possible to override a base class&#39; class variable using only class annotations.
`431 &lt;https://github.com/python-attrs/attrs/issues/431&gt;`_


----

18.1.0

-------------------

Changes
^^^^^^^

- ``x=X(); x.cycle = x; repr(x)`` will no longer raise a ``RecursionError``, and will instead show as ``X(x=...)``.

`95 &lt;https://github.com/python-attrs/attrs/issues/95&gt;`_
- ``attr.ib(factory=f)`` is now syntactic sugar for the common case of ``attr.ib(default=attr.Factory(f))``.

`178 &lt;https://github.com/python-attrs/attrs/issues/178&gt;`_,
`356 &lt;https://github.com/python-attrs/attrs/issues/356&gt;`_
- Added ``attr.field_dict()`` to return an ordered dictionary of ``attrs`` attributes for a class, whose keys are the attribute names.

`290 &lt;https://github.com/python-attrs/attrs/issues/290&gt;`_,
`349 &lt;https://github.com/python-attrs/attrs/issues/349&gt;`_
- The order of attributes that are passed into ``attr.make_class()`` or the *these* argument of ``attr.s()`` is now retained if the dictionary is ordered (i.e. ``dict`` on Python 3.6 and later, ``collections.OrderedDict`` otherwise).

Before, the order was always determined by the order in which the attributes have been defined which may not be desirable when creating classes programatically.

`300 &lt;https://github.com/python-attrs/attrs/issues/300&gt;`_,
`339 &lt;https://github.com/python-attrs/attrs/issues/339&gt;`_,
`343 &lt;https://github.com/python-attrs/attrs/issues/343&gt;`_
- In slotted classes, ``__getstate__`` and ``__setstate__`` now ignore the ``__weakref__`` attribute.

`311 &lt;https://github.com/python-attrs/attrs/issues/311&gt;`_,
`326 &lt;https://github.com/python-attrs/attrs/issues/326&gt;`_
- Setting the cell type is now completely best effort.
This fixes ``attrs`` on Jython.

We cannot make any guarantees regarding Jython though, because our test suite cannot run due to dependency incompatabilities.

`321 &lt;https://github.com/python-attrs/attrs/issues/321&gt;`_,
`334 &lt;https://github.com/python-attrs/attrs/issues/334&gt;`_
- If ``attr.s`` is passed a *these* argument, it will no longer attempt to remove attributes with the same name from the class body.

`322 &lt;https://github.com/python-attrs/attrs/issues/322&gt;`_,
`323 &lt;https://github.com/python-attrs/attrs/issues/323&gt;`_
- The hash of ``attr.NOTHING`` is now vegan and faster on 32bit Python builds.

`331 &lt;https://github.com/python-attrs/attrs/issues/331&gt;`_,
`332 &lt;https://github.com/python-attrs/attrs/issues/332&gt;`_
- The overhead of instantiating frozen dict classes is virtually eliminated.
`336 &lt;https://github.com/python-attrs/attrs/issues/336&gt;`_
- Generated ``__init__`` methods now have an ``__annotations__`` attribute derived from the types of the fields.

`363 &lt;https://github.com/python-attrs/attrs/issues/363&gt;`_
- We have restructured the documentation a bit to account for ``attrs``&#39; growth in scope.
Instead of putting everything into the `examples &lt;https://www.attrs.org/en/stable/examples.html&gt;`_ page, we have started to extract narrative chapters.

So far, we&#39;ve added chapters on `initialization &lt;https://www.attrs.org/en/stable/init.html&gt;`_ and `hashing &lt;https://www.attrs.org/en/stable/hashing.html&gt;`_.

Expect more to come!

`369 &lt;https://github.com/python-attrs/attrs/issues/369&gt;`_,
`370 &lt;https://github.com/python-attrs/attrs/issues/370&gt;`_


----

17.4.0

-------------------

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- The traversal of MROs when using multiple inheritance was backward:
If you defined a class ``C`` that subclasses ``A`` and ``B`` like ``C(A, B)``, ``attrs`` would have collected the attributes from ``B`` *before* those of ``A``.

This is now fixed and means that in classes that employ multiple inheritance, the output of ``__repr__`` and the order of positional arguments in ``__init__`` changes.
Because of the nature of this bug, a proper deprecation cycle was unfortunately impossible.

Generally speaking, it&#39;s advisable to prefer ``kwargs``-based initialization anyways – *especially* if you employ multiple inheritance and diamond-shaped hierarchies.

`298 &lt;https://github.com/python-attrs/attrs/issues/298&gt;`_,
`299 &lt;https://github.com/python-attrs/attrs/issues/299&gt;`_,
`304 &lt;https://github.com/python-attrs/attrs/issues/304&gt;`_
- The ``__repr__`` set by ``attrs`` no longer produces an ``AttributeError`` when the instance is missing some of the specified attributes (either through deleting or after using ``init=False`` on some attributes).

This can break code that relied on ``repr(attr_cls_instance)`` raising ``AttributeError`` to check if any ``attrs``-specified members were unset.

If you were using this, you can implement a custom method for checking this::

   def has_unset_members(self):
       for field in attr.fields(type(self)):
           try:
               getattr(self, field.name)
           except AttributeError:
               return True
       return False

`308 &lt;https://github.com/python-attrs/attrs/issues/308&gt;`_


Deprecations
^^^^^^^^^^^^

- The ``attr.ib(convert=callable)`` option is now deprecated in favor of ``attr.ib(converter=callable)``.

This is done to achieve consistency with other noun-based arguments like *validator*.

*convert* will keep working until at least January 2019 while raising a ``DeprecationWarning``.

`307 &lt;https://github.com/python-attrs/attrs/issues/307&gt;`_


Changes
^^^^^^^

- Generated ``__hash__`` methods now hash the class type along with the attribute values.
Until now the hashes of two classes with the same values were identical which was a bug.

The generated method is also *much* faster now.

`261 &lt;https://github.com/python-attrs/attrs/issues/261&gt;`_,
`295 &lt;https://github.com/python-attrs/attrs/issues/295&gt;`_,
`296 &lt;https://github.com/python-attrs/attrs/issues/296&gt;`_
- ``attr.ib``\ ’s *metadata* argument now defaults to a unique empty ``dict`` instance instead of sharing a common empty ``dict`` for all.
The singleton empty ``dict`` is still enforced.

`280 &lt;https://github.com/python-attrs/attrs/issues/280&gt;`_
- ``ctypes`` is optional now however if it&#39;s missing, a bare ``super()`` will not work in slotted classes.
This should only happen in special environments like Google App Engine.

`284 &lt;https://github.com/python-attrs/attrs/issues/284&gt;`_,
`286 &lt;https://github.com/python-attrs/attrs/issues/286&gt;`_
- The attribute redefinition feature introduced in 17.3.0 now takes into account if an attribute is redefined via multiple inheritance.
In that case, the definition that is closer to the base of the class hierarchy wins.

`285 &lt;https://github.com/python-attrs/attrs/issues/285&gt;`_,
`287 &lt;https://github.com/python-attrs/attrs/issues/287&gt;`_
- Subclasses of ``auto_attribs=True`` can be empty now.

`291 &lt;https://github.com/python-attrs/attrs/issues/291&gt;`_,
`292 &lt;https://github.com/python-attrs/attrs/issues/292&gt;`_
- Equality tests are *much* faster now.

`306 &lt;https://github.com/python-attrs/attrs/issues/306&gt;`_
- All generated methods now have correct ``__module__``, ``__name__``, and (on Python 3) ``__qualname__`` attributes.

`309 &lt;https://github.com/python-attrs/attrs/issues/309&gt;`_


----

17.3.0

-------------------

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Attributes are no longer defined on the class body.

This means that if you define a class ``C`` with an attribute ``x``, the class will *not* have an attribute ``x`` for introspection.
Instead of ``C.x``, use ``attr.fields(C).x`` or look at ``C.__attrs_attrs__``.
The old behavior has been deprecated since version 16.1.
(`253 &lt;https://github.com/python-attrs/attrs/issues/253&gt;`_)


Changes
^^^^^^^

- ``super()`` and ``__class__`` now work with slotted classes on Python 3.
(`102 &lt;https://github.com/python-attrs/attrs/issues/102&gt;`_, `226 &lt;https://github.com/python-attrs/attrs/issues/226&gt;`_, `269 &lt;https://github.com/python-attrs/attrs/issues/269&gt;`_, `270 &lt;https://github.com/python-attrs/attrs/issues/270&gt;`_, `272 &lt;https://github.com/python-attrs/attrs/issues/272&gt;`_)
- Added *type* argument to ``attr.ib()`` and corresponding ``type`` attribute to ``attr.Attribute``.

This change paves the way for automatic type checking and serialization (though as of this release ``attrs`` does not make use of it).
In Python 3.6 or higher, the value of ``attr.Attribute.type`` can alternately be set using variable type annotations
(see `PEP 526 &lt;https://www.python.org/dev/peps/pep-0526/&gt;`_).
(`151 &lt;https://github.com/python-attrs/attrs/issues/151&gt;`_, `214 &lt;https://github.com/python-attrs/attrs/issues/214&gt;`_, `215 &lt;https://github.com/python-attrs/attrs/issues/215&gt;`_, `239 &lt;https://github.com/python-attrs/attrs/issues/239&gt;`_)
- The combination of ``str=True`` and ``slots=True`` now works on Python 2.
(`198 &lt;https://github.com/python-attrs/attrs/issues/198&gt;`_)
- ``attr.Factory`` is hashable again.
(`204 &lt;https://github.com/python-attrs/attrs/issues/204&gt;`_)
- Subclasses now can overwrite attribute definitions of their base classes.

That means that you can -- for example -- change the default value for an attribute by redefining it.
(`221 &lt;https://github.com/python-attrs/attrs/issues/221&gt;`_, `229 &lt;https://github.com/python-attrs/attrs/issues/229&gt;`_)
- Added new option *auto_attribs* to ``attr.s`` that allows to collect annotated fields without setting them to ``attr.ib()``.

Setting a field to an ``attr.ib()`` is still possible to supply options like validators.
Setting it to any other value is treated like it was passed as ``attr.ib(default=value)`` -- passing an instance of ``attr.Factory`` also works as expected.
(`262 &lt;https://github.com/python-attrs/attrs/issues/262&gt;`_, `277 &lt;https://github.com/python-attrs/attrs/issues/277&gt;`_)
- Instances of classes created using ``attr.make_class()`` can now be pickled.
(`282 &lt;https://github.com/python-attrs/attrs/issues/282&gt;`_)


----

17.2.0

-------------------


Changes:
^^^^^^^^

- Validators are hashable again.
Note that validators may become frozen in the future, pending availability of no-overhead frozen classes.
`192 &lt;https://github.com/python-attrs/attrs/issues/192&gt;`_


----

17.1.0

-------------------

To encourage more participation, the project has also been moved into a `dedicated GitHub organization &lt;https://github.com/python-attrs/&gt;`_ and everyone is most welcome to join!

``attrs`` also has a logo now!

.. image:: https://www.attrs.org/en/latest/_static/attrs_logo.png
:alt: attrs logo


Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- ``attrs`` will set the ``__hash__()`` method to ``None`` by default now.
The way hashes were handled before was in conflict with `Python&#39;s specification &lt;https://docs.python.org/3/reference/datamodel.htmlobject.__hash__&gt;`_.
This *may* break some software although this breakage is most likely just surfacing of latent bugs.
You can always make ``attrs`` create the ``__hash__()`` method using ``attr.s(hash=True)``.
See `136`_ for the rationale of this change.

.. warning::

 Please *do not* upgrade blindly and *do* test your software!
 *Especially* if you use instances as dict keys or put them into sets!

- Correspondingly, ``attr.ib``&#39;s *hash* argument is ``None`` by default too and mirrors the *cmp* argument as it should.


Deprecations:
^^^^^^^^^^^^^

- ``attr.assoc()`` is now deprecated in favor of ``attr.evolve()`` and will stop working in 2018.


Changes:
^^^^^^^^

- Fix default hashing behavior.
Now *hash* mirrors the value of *cmp* and classes are unhashable by default.
`136`_
`142 &lt;https://github.com/python-attrs/attrs/issues/142&gt;`_
- Added ``attr.evolve()`` that, given an instance of an ``attrs`` class and field changes as keyword arguments, will instantiate a copy of the given instance with the changes applied.
``evolve()`` replaces ``assoc()``, which is now deprecated.
``evolve()`` is significantly faster than ``assoc()``, and requires the class have an initializer that can take the field values as keyword arguments (like ``attrs`` itself can generate).
`116 &lt;https://github.com/python-attrs/attrs/issues/116&gt;`_
`124 &lt;https://github.com/python-attrs/attrs/pull/124&gt;`_
`135 &lt;https://github.com/python-attrs/attrs/pull/135&gt;`_
- ``FrozenInstanceError`` is now raised when trying to delete an attribute from a frozen class.
`118 &lt;https://github.com/python-attrs/attrs/pull/118&gt;`_
- Frozen-ness of classes is now inherited.
`128 &lt;https://github.com/python-attrs/attrs/pull/128&gt;`_
- ``__attrs_post_init__()`` is now run if validation is disabled.
`130 &lt;https://github.com/python-attrs/attrs/pull/130&gt;`_
- Added ``attr.validators.in_(options)`` that, given the allowed ``options``, checks whether the attribute value is in it.
This can be used to check constants, enums, mappings, etc.
`181 &lt;https://github.com/python-attrs/attrs/pull/181&gt;`_
- Added ``attr.validators.and_()`` that composes multiple validators into one.
`161 &lt;https://github.com/python-attrs/attrs/issues/161&gt;`_
- For convenience, the *validator* argument of ``attr.s`` now can take a list of validators that are wrapped using ``and_()``.
`138 &lt;https://github.com/python-attrs/attrs/issues/138&gt;`_
- Accordingly, ``attr.validators.optional()`` now can take a list of validators too.
`161 &lt;https://github.com/python-attrs/attrs/issues/161&gt;`_
- Validators can now be defined conveniently inline by using the attribute as a decorator.
Check out the `validator examples &lt;http://www.attrs.org/en/stable/init.htmldecorator&gt;`_ to see it in action!
`143 &lt;https://github.com/python-attrs/attrs/issues/143&gt;`_
- ``attr.Factory()`` now has a *takes_self* argument that makes the initializer to pass the partially initialized instance into the factory.
In other words you can define attribute defaults based on other attributes.
`165`_
`189 &lt;https://github.com/python-attrs/attrs/issues/189&gt;`_
- Default factories can now also be defined inline using decorators.
They are *always* passed the partially initialized instance.
`165`_
- Conversion can now be made optional using ``attr.converters.optional()``.
`105 &lt;https://github.com/python-attrs/attrs/issues/105&gt;`_
`173 &lt;https://github.com/python-attrs/attrs/pull/173&gt;`_
- ``attr.make_class()`` now accepts the keyword argument ``bases`` which allows for subclassing.
`152 &lt;https://github.com/python-attrs/attrs/pull/152&gt;`_
- Metaclasses are now preserved with ``slots=True``.
`155 &lt;https://github.com/python-attrs/attrs/pull/155&gt;`_

.. _`136`: https://github.com/python-attrs/attrs/issues/136
.. _`165`: https://github.com/python-attrs/attrs/issues/165


----

16.3.0

-------------------

Changes:
^^^^^^^^

- Attributes now can have user-defined metadata which greatly improves ``attrs``&#39;s extensibility.
`96 &lt;https://github.com/python-attrs/attrs/pull/96&gt;`_
- Allow for a ``__attrs_post_init__()`` method that -- if defined -- will get called at the end of the ``attrs``-generated ``__init__()`` method.
`111 &lt;https://github.com/python-attrs/attrs/pull/111&gt;`_
- Added ``attr.s(str=True)`` that will optionally create a ``__str__()`` method that is identical to ``__repr__()``.
This is mainly useful with ``Exception``\ s and other classes that rely on a useful ``__str__()`` implementation but overwrite the default one through a poor own one.
Default Python class behavior is to use ``__repr__()`` as ``__str__()`` anyways.

If you tried using ``attrs`` with ``Exception``\ s and were puzzled by the tracebacks: this option is for you.
- ``__name__`` is no longer overwritten with ``__qualname__`` for ``attr.s(slots=True)`` classes.
`99 &lt;https://github.com/python-attrs/attrs/issues/99&gt;`_


----

16.2.0

-------------------

Changes:
^^^^^^^^

- Added ``attr.astuple()`` that -- similarly to ``attr.asdict()`` -- returns the instance as a tuple.
`77 &lt;https://github.com/python-attrs/attrs/issues/77&gt;`_
- Converters now work with frozen classes.
`76 &lt;https://github.com/python-attrs/attrs/issues/76&gt;`_
- Instantiation of ``attrs`` classes with converters is now significantly faster.
`80 &lt;https://github.com/python-attrs/attrs/pull/80&gt;`_
- Pickling now works with slotted classes.
`81 &lt;https://github.com/python-attrs/attrs/issues/81&gt;`_
- ``attr.assoc()`` now works with slotted classes.
`84 &lt;https://github.com/python-attrs/attrs/issues/84&gt;`_
- The tuple returned by ``attr.fields()`` now also allows to access the ``Attribute`` instances by name.
Yes, we&#39;ve subclassed ``tuple`` so you don&#39;t have to!
Therefore ``attr.fields(C).x`` is equivalent to the deprecated ``C.x`` and works with slotted classes.
`88 &lt;https://github.com/python-attrs/attrs/issues/88&gt;`_


----

16.1.0

-------------------

Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- All instances where function arguments were called ``cl`` have been changed to the more Pythonic ``cls``.
Since it was always the first argument, it&#39;s doubtful anyone ever called those function with in the keyword form.
If so, sorry for any breakage but there&#39;s no practical deprecation path to solve this ugly wart.


Deprecations:
^^^^^^^^^^^^^

- Accessing ``Attribute`` instances on class objects is now deprecated and will stop working in 2017.
If you need introspection please use the ``__attrs_attrs__`` attribute or the ``attr.fields()`` function that carry them too.
In the future, the attributes that are defined on the class body and are usually overwritten in your ``__init__`` method are simply removed after ``attr.s`` has been applied.

This will remove the confusing error message if you write your own ``__init__`` and forget to initialize some attribute.
Instead you will get a straightforward ``AttributeError``.
In other words: decorated classes will work more like plain Python classes which was always ``attrs``&#39;s goal.
- The serious business aliases ``attr.attributes`` and ``attr.attr`` have been deprecated in favor of ``attr.attrs`` and ``attr.attrib`` which are much more consistent and frankly obvious in hindsight.
They will be purged from documentation immediately but there are no plans to actually remove them.


Changes:
^^^^^^^^

- ``attr.asdict()``\ &#39;s ``dict_factory`` arguments is now propagated on recursion.
`45 &lt;https://github.com/python-attrs/attrs/issues/45&gt;`_
- ``attr.asdict()``, ``attr.has()`` and ``attr.fields()`` are significantly faster.
`48 &lt;https://github.com/python-attrs/attrs/issues/48&gt;`_
`51 &lt;https://github.com/python-attrs/attrs/issues/51&gt;`_
- Add ``attr.attrs`` and ``attr.attrib`` as a more consistent aliases for ``attr.s`` and ``attr.ib``.
- Add *frozen* option to ``attr.s`` that will make instances best-effort immutable.
`60 &lt;https://github.com/python-attrs/attrs/issues/60&gt;`_
- ``attr.asdict()`` now takes ``retain_collection_types`` as an argument.
If ``True``, it does not convert attributes of type ``tuple`` or ``set`` to ``list``.
`69 &lt;https://github.com/python-attrs/attrs/issues/69&gt;`_


----

16.0.0

-------------------

Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Python 3.3 and 2.6 are no longer supported.
They may work by chance but any effort to keep them working has ceased.

The last Python 2.6 release was on October 29, 2013 and is no longer supported by the CPython core team.
Major Python packages like Django and Twisted dropped Python 2.6 a while ago already.

Python 3.3 never had a significant user base and wasn&#39;t part of any distribution&#39;s LTS release.

Changes:
^^^^^^^^

- ``__slots__`` have arrived!
Classes now can automatically be `slotted &lt;https://docs.python.org/3/reference/datamodel.htmlslots&gt;`_-style (and save your precious memory) just by passing ``slots=True``.
`35 &lt;https://github.com/python-attrs/attrs/issues/35&gt;`_
- Allow the case of initializing attributes that are set to ``init=False``.
This allows for clean initializer parameter lists while being able to initialize attributes to default values.
`32 &lt;https://github.com/python-attrs/attrs/issues/32&gt;`_
- ``attr.asdict()`` can now produce arbitrary mappings instead of Python ``dict``\ s when provided with a ``dict_factory`` argument.
`40 &lt;https://github.com/python-attrs/attrs/issues/40&gt;`_
- Multiple performance improvements.


----

15.2.0

-------------------

Changes:
^^^^^^^^

- Added a ``convert`` argument to ``attr.ib``, which allows specifying a function to run on arguments.
This allows for simple type conversions, e.g. with ``attr.ib(convert=int)``.
`26 &lt;https://github.com/python-attrs/attrs/issues/26&gt;`_
- Speed up object creation when attribute validators are used.
`28 &lt;https://github.com/python-attrs/attrs/issues/28&gt;`_


----

15.1.0

-------------------

Changes:
^^^^^^^^

- Added ``attr.validators.optional()`` that wraps other validators allowing attributes to be ``None``.
`16 &lt;https://github.com/python-attrs/attrs/issues/16&gt;`_
- Multi-level inheritance now works.
`24 &lt;https://github.com/python-attrs/attrs/issues/24&gt;`_
- ``__repr__()`` now works with non-redecorated subclasses.
`20 &lt;https://github.com/python-attrs/attrs/issues/20&gt;`_


----

15.0.0

-------------------

Changes:
^^^^^^^^

Initial release.

Links

PyPI: https://pypi.org/project/attrs
Changelog: https://pyup.io/changelogs/attrs/
Homepage: https://www.attrs.org/

vorpal-buildbot · 2020-03-30T10:57:47Z

Changelogs

Warning: 2 is pinned to a specific version.

attrs 19.3.0

Changes
^^^^^^^

Fixed auto_attribs usage when default values cannot be compared directly with ==, such as numpy arrays.
585 <https://github.com/python-attrs/attrs/issues/585>_

attrs 19.2.0

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Removed deprecated Attribute attribute convert per scheduled removal on 2019/1.
This planned deprecation is tracked in issue 307 <https://github.com/python-attrs/attrs/issues/307>.
504 <https://github.com/python-attrs/attrs/issues/504>
__lt__, __le__, __gt__, and __ge__ do not consider subclasses comparable anymore.

This has been deprecated since 18.2.0 and was raising a DeprecationWarning for over a year.
570 <https://github.com/python-attrs/attrs/issues/570>_

Deprecations
^^^^^^^^^^^^

The cmp argument to attr.s() and attr.ib() is now deprecated.

Please use eq to add equality methods (__eq__ and __ne__) and order to add ordering methods (__lt__, __le__, __gt__, and __ge__) instead – just like with dataclasses <https://docs.python.org/3/library/dataclasses.html>_.

Both are effectively True by default but it's enough to set eq=False to disable both at once.
Passing eq=False, order=True explicitly will raise a ValueError though.

Since this is arguably a deeper backward-compatibility break, it will have an extended deprecation period until 2021-06-01.
After that day, the cmp argument will be removed.

attr.Attribute also isn't orderable anymore.
574 <https://github.com/python-attrs/attrs/issues/574>_

Changes
^^^^^^^

Updated attr.validators.__all__ to include new validators added in 425.
517 <https://github.com/python-attrs/attrs/issues/517>
Slotted classes now use a pure Python mechanism to rewrite the __class__ cell when rebuilding the class, so super() works even on environments where ctypes is not installed.
522 <https://github.com/python-attrs/attrs/issues/522>_
When collecting attributes using attr.s(auto_attribs=True), attributes with a default of None are now deleted too.
523 <https://github.com/python-attrs/attrs/issues/523>,
556 <https://github.com/python-attrs/attrs/issues/556>
Fixed attr.validators.deep_iterable() and attr.validators.deep_mapping() type stubs.
533 <https://github.com/python-attrs/attrs/issues/533>_
attr.validators.is_callable() validator now raises an exception attr.exceptions.NotCallableError, a subclass of TypeError, informing the received value.
536 <https://github.com/python-attrs/attrs/issues/536>_
attr.s(auto_exc=True) now generates classes that are hashable by ID, as the documentation always claimed it would.
543 <https://github.com/python-attrs/attrs/issues/543>,
563 <https://github.com/python-attrs/attrs/issues/563>
Added attr.validators.matches_re() that checks string attributes whether they match a regular expression.
552 <https://github.com/python-attrs/attrs/issues/552>_
Keyword-only attributes (kw_only=True) and attributes that are excluded from the attrs's __init__ (init=False) now can appear before mandatory attributes.
559 <https://github.com/python-attrs/attrs/issues/559>_
The fake filename for generated methods is now more stable.
It won't change when you restart the process.
560 <https://github.com/python-attrs/attrs/issues/560>_
The value passed to attr.ib(repr=…) can now be either a boolean (as before) or a callable.
That callable must return a string and is then used for formatting the attribute by the generated __repr__() method.
568 <https://github.com/python-attrs/attrs/issues/568>_
Added attr.__version_info__ that can be used to reliably check the version of attrs and write forward- and backward-compatible code.
Please check out the section on deprecated APIs <http://www.attrs.org/en/stable/api.htmldeprecated-apis>_ on how to use it.
580 <https://github.com/python-attrs/attrs/issues/580>_

.. _425: python-attrs/attrs#425

attrs 19.1.0

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Fixed a bug where deserialized objects with cache_hash=True could have incorrect hash code values.
This change breaks classes with cache_hash=True when a custom __setstate__ is present.
An exception will be thrown when applying the attrs annotation to such a class.
This limitation is tracked in issue 494 <https://github.com/python-attrs/attrs/issues/494>.
482 <https://github.com/python-attrs/attrs/issues/482>

Changes
^^^^^^^

Add is_callable, deep_iterable, and deep_mapping validators.
- is_callable: validates that a value is callable
- deep_iterable: Allows recursion down into an iterable,
  applying another validator to every member in the iterable
  as well as applying an optional validator to the iterable itself.
- deep_mapping: Allows recursion down into the items in a mapping object,
  applying a key validator and a value validator to the key and value in every item.
  Also applies an optional validator to the mapping object itself.
You can find them in the attr.validators package.
425_
Fixed stub files to prevent errors raised by mypy's disallow_any_generics = True option.
443 <https://github.com/python-attrs/attrs/issues/443>_
Attributes with init=False now can follow after kw_only=True attributes.
450 <https://github.com/python-attrs/attrs/issues/450>_
attrs now has first class support for defining exception classes.

If you define a class using attr.s(auto_exc=True) and subclass an exception, the class will behave like a well-behaved exception class including an appropriate __str__ method, and all attributes additionally available in an args attribute.
500 <https://github.com/python-attrs/attrs/issues/500>_
Clarified documentation for hashing to warn that hashable objects should be deeply immutable (in their usage, even if this is not enforced).
503 <https://github.com/python-attrs/attrs/issues/503>_

attrs 18.2.0

Deprecations
^^^^^^^^^^^^

Comparing subclasses using <, >, <=, and >= is now deprecated.
The docs always claimed that instances are only compared if the types are identical, so this is a first step to conform to the docs.

Equality operators (== and !=) were always strict in this regard.
394 <https://github.com/python-attrs/attrs/issues/394>_

Changes
^^^^^^^

attrs now ships its own PEP 484 <https://www.python.org/dev/peps/pep-0484/>_ type hints.
Together with mypy <http://mypy-lang.org>_'s attrs plugin, you've got all you need for writing statically typed code in both Python 2 and 3!

At that occasion, we've also added narrative docs <https://www.attrs.org/en/stable/types.html>_ about type annotations in attrs.
238 <https://github.com/python-attrs/attrs/issues/238>_
Added kw_only arguments to attr.ib and attr.s, and a corresponding kw_only attribute to attr.Attribute.
This change makes it possible to have a generated __init__ with keyword-only arguments on Python 3, relaxing the required ordering of default and non-default valued attributes.
281 <https://github.com/python-attrs/attrs/issues/281>,
411 <https://github.com/python-attrs/attrs/issues/411>
The test suite now runs with hypothesis.HealthCheck.too_slow disabled to prevent CI breakage on slower computers.
364 <https://github.com/python-attrs/attrs/issues/364>,
396 <https://github.com/python-attrs/attrs/issues/396>
attr.validators.in_() now raises a ValueError with a useful message even if the options are a string and the value is not a string.
383 <https://github.com/python-attrs/attrs/issues/383>_
attr.asdict() now properly handles deeply nested lists and dictionaries.
395 <https://github.com/python-attrs/attrs/issues/395>_
Added attr.converters.default_if_none() that allows to replace None values in attributes.
For example attr.ib(converter=default_if_none("")) replaces None by empty strings.
400 <https://github.com/python-attrs/attrs/issues/400>,
414 <https://github.com/python-attrs/attrs/issues/414>
Fixed a reference leak where the original class would remain live after being replaced when slots=True is set.
407 <https://github.com/python-attrs/attrs/issues/407>_
Slotted classes can now be made weakly referenceable by passing attr.s(weakref_slot=True).
420 <https://github.com/python-attrs/attrs/issues/420>_
Added cache_hash option to attr.s which causes the hash code to be computed once and stored on the object.
426 <https://github.com/python-attrs/attrs/issues/426>_
Attributes can be named property and itemgetter now.
430 <https://github.com/python-attrs/attrs/issues/430>_
It is now possible to override a base class' class variable using only class annotations.
431 <https://github.com/python-attrs/attrs/issues/431>_

attrs 18.1.0

Changes
^^^^^^^

x=X(); x.cycle = x; repr(x) will no longer raise a RecursionError, and will instead show as X(x=...).

95 <https://github.com/python-attrs/attrs/issues/95>_
attr.ib(factory=f) is now syntactic sugar for the common case of attr.ib(default=attr.Factory(f)).

178 <https://github.com/python-attrs/attrs/issues/178>,
356 <https://github.com/python-attrs/attrs/issues/356>
Added attr.field_dict() to return an ordered dictionary of attrs attributes for a class, whose keys are the attribute names.

290 <https://github.com/python-attrs/attrs/issues/290>,
349 <https://github.com/python-attrs/attrs/issues/349>
The order of attributes that are passed into attr.make_class() or the these argument of attr.s() is now retained if the dictionary is ordered (i.e. dict on Python 3.6 and later, collections.OrderedDict otherwise).

Before, the order was always determined by the order in which the attributes have been defined which may not be desirable when creating classes programatically.

300 <https://github.com/python-attrs/attrs/issues/300>,
339 <https://github.com/python-attrs/attrs/issues/339>,
343 <https://github.com/python-attrs/attrs/issues/343>_
In slotted classes, __getstate__ and __setstate__ now ignore the __weakref__ attribute.

311 <https://github.com/python-attrs/attrs/issues/311>,
326 <https://github.com/python-attrs/attrs/issues/326>
Setting the cell type is now completely best effort.
This fixes attrs on Jython.

We cannot make any guarantees regarding Jython though, because our test suite cannot run due to dependency incompatabilities.

321 <https://github.com/python-attrs/attrs/issues/321>,
334 <https://github.com/python-attrs/attrs/issues/334>
If attr.s is passed a these argument, it will no longer attempt to remove attributes with the same name from the class body.

322 <https://github.com/python-attrs/attrs/issues/322>,
323 <https://github.com/python-attrs/attrs/issues/323>
The hash of attr.NOTHING is now vegan and faster on 32bit Python builds.

331 <https://github.com/python-attrs/attrs/issues/331>,
332 <https://github.com/python-attrs/attrs/issues/332>
The overhead of instantiating frozen dict classes is virtually eliminated.
336 <https://github.com/python-attrs/attrs/issues/336>_
Generated __init__ methods now have an __annotations__ attribute derived from the types of the fields.

363 <https://github.com/python-attrs/attrs/issues/363>_
We have restructured the documentation a bit to account for attrs' growth in scope.
Instead of putting everything into the examples <https://www.attrs.org/en/stable/examples.html>_ page, we have started to extract narrative chapters.

So far, we've added chapters on initialization <https://www.attrs.org/en/stable/init.html>_ and hashing <https://www.attrs.org/en/stable/hashing.html>_.

Expect more to come!

369 <https://github.com/python-attrs/attrs/issues/369>,
370 <https://github.com/python-attrs/attrs/issues/370>

attrs 17.4.0

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The traversal of MROs when using multiple inheritance was backward:
If you defined a class C that subclasses A and B like C(A, B), attrs would have collected the attributes from B before those of A.

This is now fixed and means that in classes that employ multiple inheritance, the output of __repr__ and the order of positional arguments in __init__ changes.
Because of the nature of this bug, a proper deprecation cycle was unfortunately impossible.

Generally speaking, it's advisable to prefer kwargs-based initialization anyways – especially if you employ multiple inheritance and diamond-shaped hierarchies.

298 <https://github.com/python-attrs/attrs/issues/298>,
299 <https://github.com/python-attrs/attrs/issues/299>,
304 <https://github.com/python-attrs/attrs/issues/304>_
The __repr__ set by attrs no longer produces an AttributeError when the instance is missing some of the specified attributes (either through deleting or after using init=False on some attributes).

This can break code that relied on repr(attr_cls_instance) raising AttributeError to check if any attrs-specified members were unset.

If you were using this, you can implement a custom method for checking this::
```
def has_unset_members(self):
    for field in attr.fields(type(self)):
        try:
            getattr(self, field.name)
        except AttributeError:
            return True
    return False
```
308 <https://github.com/python-attrs/attrs/issues/308>_

Deprecations
^^^^^^^^^^^^

The attr.ib(convert=callable) option is now deprecated in favor of attr.ib(converter=callable).

This is done to achieve consistency with other noun-based arguments like validator.

convert will keep working until at least January 2019 while raising a DeprecationWarning.

307 <https://github.com/python-attrs/attrs/issues/307>_

Changes
^^^^^^^

Generated __hash__ methods now hash the class type along with the attribute values.
Until now the hashes of two classes with the same values were identical which was a bug.

The generated method is also much faster now.

261 <https://github.com/python-attrs/attrs/issues/261>,
295 <https://github.com/python-attrs/attrs/issues/295>,
296 <https://github.com/python-attrs/attrs/issues/296>_
attr.ib\ ’s metadata argument now defaults to a unique empty dict instance instead of sharing a common empty dict for all.
The singleton empty dict is still enforced.

280 <https://github.com/python-attrs/attrs/issues/280>_
ctypes is optional now however if it's missing, a bare super() will not work in slotted classes.
This should only happen in special environments like Google App Engine.

284 <https://github.com/python-attrs/attrs/issues/284>,
286 <https://github.com/python-attrs/attrs/issues/286>
The attribute redefinition feature introduced in 17.3.0 now takes into account if an attribute is redefined via multiple inheritance.
In that case, the definition that is closer to the base of the class hierarchy wins.

285 <https://github.com/python-attrs/attrs/issues/285>,
287 <https://github.com/python-attrs/attrs/issues/287>
Subclasses of auto_attribs=True can be empty now.

291 <https://github.com/python-attrs/attrs/issues/291>,
292 <https://github.com/python-attrs/attrs/issues/292>
Equality tests are much faster now.

306 <https://github.com/python-attrs/attrs/issues/306>_
All generated methods now have correct __module__, __name__, and (on Python 3) __qualname__ attributes.

309 <https://github.com/python-attrs/attrs/issues/309>_

attrs 17.3.0

Backward-incompatible Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Attributes are no longer defined on the class body.

This means that if you define a class C with an attribute x, the class will not have an attribute x for introspection.
Instead of C.x, use attr.fields(C).x or look at C.__attrs_attrs__.
The old behavior has been deprecated since version 16.1.
(253 <https://github.com/python-attrs/attrs/issues/253>_)

Changes
^^^^^^^

super() and __class__ now work with slotted classes on Python 3.
(102 <https://github.com/python-attrs/attrs/issues/102>, 226 <https://github.com/python-attrs/attrs/issues/226>, 269 <https://github.com/python-attrs/attrs/issues/269>, 270 <https://github.com/python-attrs/attrs/issues/270>, 272 <https://github.com/python-attrs/attrs/issues/272>_)
Added type argument to attr.ib() and corresponding type attribute to attr.Attribute.

This change paves the way for automatic type checking and serialization (though as of this release attrs does not make use of it).
In Python 3.6 or higher, the value of attr.Attribute.type can alternately be set using variable type annotations
(see PEP 526 <https://www.python.org/dev/peps/pep-0526/>).
(151 <https://github.com/python-attrs/attrs/issues/151>, 214 <https://github.com/python-attrs/attrs/issues/214>, 215 <https://github.com/python-attrs/attrs/issues/215>, 239 <https://github.com/python-attrs/attrs/issues/239>_)
The combination of str=True and slots=True now works on Python 2.
(198 <https://github.com/python-attrs/attrs/issues/198>_)
attr.Factory is hashable again.
(204 <https://github.com/python-attrs/attrs/issues/204>_)
Subclasses now can overwrite attribute definitions of their base classes.

That means that you can -- for example -- change the default value for an attribute by redefining it.
(221 <https://github.com/python-attrs/attrs/issues/221>, 229 <https://github.com/python-attrs/attrs/issues/229>)
Added new option auto_attribs to attr.s that allows to collect annotated fields without setting them to attr.ib().

Setting a field to an attr.ib() is still possible to supply options like validators.
Setting it to any other value is treated like it was passed as attr.ib(default=value) -- passing an instance of attr.Factory also works as expected.
(262 <https://github.com/python-attrs/attrs/issues/262>, 277 <https://github.com/python-attrs/attrs/issues/277>)
Instances of classes created using attr.make_class() can now be pickled.
(282 <https://github.com/python-attrs/attrs/issues/282>_)

attrs 17.2.0

Changes:
^^^^^^^^

Validators are hashable again.
Note that validators may become frozen in the future, pending availability of no-overhead frozen classes.
192 <https://github.com/python-attrs/attrs/issues/192>_

attrs 17.1.0

To encourage more participation, the project has also been moved into a dedicated GitHub organization <https://github.com/python-attrs/>_ and everyone is most welcome to join!

attrs also has a logo now!

.. image:: https://www.attrs.org/en/latest/_static/attrs_logo.png
:alt: attrs logo

Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

attrs will set the __hash__() method to None by default now.
The way hashes were handled before was in conflict with Python's specification <https://docs.python.org/3/reference/datamodel.htmlobject.__hash__>.
This may break some software although this breakage is most likely just surfacing of latent bugs.
You can always make attrs create the __hash__() method using attr.s(hash=True).
See 136 for the rationale of this change.

.. warning::

Please do not upgrade blindly and do test your software!
Especially if you use instances as dict keys or put them into sets!
Correspondingly, attr.ib's hash argument is None by default too and mirrors the cmp argument as it should.

Deprecations:
^^^^^^^^^^^^^

attr.assoc() is now deprecated in favor of attr.evolve() and will stop working in 2018.

Changes:
^^^^^^^^

Fix default hashing behavior.
Now hash mirrors the value of cmp and classes are unhashable by default.
136_
142 <https://github.com/python-attrs/attrs/issues/142>_
Added attr.evolve() that, given an instance of an attrs class and field changes as keyword arguments, will instantiate a copy of the given instance with the changes applied.
evolve() replaces assoc(), which is now deprecated.
evolve() is significantly faster than assoc(), and requires the class have an initializer that can take the field values as keyword arguments (like attrs itself can generate).
116 <https://github.com/python-attrs/attrs/issues/116>_
124 <https://github.com/python-attrs/attrs/pull/124>_
135 <https://github.com/python-attrs/attrs/pull/135>_
FrozenInstanceError is now raised when trying to delete an attribute from a frozen class.
118 <https://github.com/python-attrs/attrs/pull/118>_
Frozen-ness of classes is now inherited.
128 <https://github.com/python-attrs/attrs/pull/128>_
__attrs_post_init__() is now run if validation is disabled.
130 <https://github.com/python-attrs/attrs/pull/130>_
Added attr.validators.in_(options) that, given the allowed options, checks whether the attribute value is in it.
This can be used to check constants, enums, mappings, etc.
181 <https://github.com/python-attrs/attrs/pull/181>_
Added attr.validators.and_() that composes multiple validators into one.
161 <https://github.com/python-attrs/attrs/issues/161>_
For convenience, the validator argument of attr.s now can take a list of validators that are wrapped using and_().
138 <https://github.com/python-attrs/attrs/issues/138>_
Accordingly, attr.validators.optional() now can take a list of validators too.
161 <https://github.com/python-attrs/attrs/issues/161>_
Validators can now be defined conveniently inline by using the attribute as a decorator.
Check out the validator examples <http://www.attrs.org/en/stable/init.htmldecorator>_ to see it in action!
143 <https://github.com/python-attrs/attrs/issues/143>_
attr.Factory() now has a takes_self argument that makes the initializer to pass the partially initialized instance into the factory.
In other words you can define attribute defaults based on other attributes.
165_
189 <https://github.com/python-attrs/attrs/issues/189>_
Default factories can now also be defined inline using decorators.
They are always passed the partially initialized instance.
165_
Conversion can now be made optional using attr.converters.optional().
105 <https://github.com/python-attrs/attrs/issues/105>_
173 <https://github.com/python-attrs/attrs/pull/173>_
attr.make_class() now accepts the keyword argument bases which allows for subclassing.
152 <https://github.com/python-attrs/attrs/pull/152>_
Metaclasses are now preserved with slots=True.
155 <https://github.com/python-attrs/attrs/pull/155>_

.. _136: python-attrs/attrs#136
.. _165: python-attrs/attrs#165

attrs 16.3.0

Changes:
^^^^^^^^

Attributes now can have user-defined metadata which greatly improves attrs's extensibility.
96 <https://github.com/python-attrs/attrs/pull/96>_
Allow for a __attrs_post_init__() method that -- if defined -- will get called at the end of the attrs-generated __init__() method.
111 <https://github.com/python-attrs/attrs/pull/111>_
Added attr.s(str=True) that will optionally create a __str__() method that is identical to __repr__().
This is mainly useful with Exception\ s and other classes that rely on a useful __str__() implementation but overwrite the default one through a poor own one.
Default Python class behavior is to use __repr__() as __str__() anyways.

If you tried using attrs with Exception\ s and were puzzled by the tracebacks: this option is for you.
__name__ is no longer overwritten with __qualname__ for attr.s(slots=True) classes.
99 <https://github.com/python-attrs/attrs/issues/99>_

attrs 16.2.0

Changes:
^^^^^^^^

Added attr.astuple() that -- similarly to attr.asdict() -- returns the instance as a tuple.
77 <https://github.com/python-attrs/attrs/issues/77>_
Converters now work with frozen classes.
76 <https://github.com/python-attrs/attrs/issues/76>_
Instantiation of attrs classes with converters is now significantly faster.
80 <https://github.com/python-attrs/attrs/pull/80>_
Pickling now works with slotted classes.
81 <https://github.com/python-attrs/attrs/issues/81>_
attr.assoc() now works with slotted classes.
84 <https://github.com/python-attrs/attrs/issues/84>_
The tuple returned by attr.fields() now also allows to access the Attribute instances by name.
Yes, we've subclassed tuple so you don't have to!
Therefore attr.fields(C).x is equivalent to the deprecated C.x and works with slotted classes.
88 <https://github.com/python-attrs/attrs/issues/88>_

attrs 16.1.0

Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

All instances where function arguments were called cl have been changed to the more Pythonic cls.
Since it was always the first argument, it's doubtful anyone ever called those function with in the keyword form.
If so, sorry for any breakage but there's no practical deprecation path to solve this ugly wart.

Deprecations:
^^^^^^^^^^^^^

Accessing Attribute instances on class objects is now deprecated and will stop working in 2017.
If you need introspection please use the __attrs_attrs__ attribute or the attr.fields() function that carry them too.
In the future, the attributes that are defined on the class body and are usually overwritten in your __init__ method are simply removed after attr.s has been applied.

This will remove the confusing error message if you write your own __init__ and forget to initialize some attribute.
Instead you will get a straightforward AttributeError.
In other words: decorated classes will work more like plain Python classes which was always attrs's goal.
The serious business aliases attr.attributes and attr.attr have been deprecated in favor of attr.attrs and attr.attrib which are much more consistent and frankly obvious in hindsight.
They will be purged from documentation immediately but there are no plans to actually remove them.

Changes:
^^^^^^^^

attr.asdict()\ 's dict_factory arguments is now propagated on recursion.
45 <https://github.com/python-attrs/attrs/issues/45>_
attr.asdict(), attr.has() and attr.fields() are significantly faster.
48 <https://github.com/python-attrs/attrs/issues/48>_
51 <https://github.com/python-attrs/attrs/issues/51>_
Add attr.attrs and attr.attrib as a more consistent aliases for attr.s and attr.ib.
Add frozen option to attr.s that will make instances best-effort immutable.
60 <https://github.com/python-attrs/attrs/issues/60>_
attr.asdict() now takes retain_collection_types as an argument.
If True, it does not convert attributes of type tuple or set to list.
69 <https://github.com/python-attrs/attrs/issues/69>_

attrs 16.0.0

Backward-incompatible Changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Python 3.3 and 2.6 are no longer supported.
They may work by chance but any effort to keep them working has ceased.

The last Python 2.6 release was on October 29, 2013 and is no longer supported by the CPython core team.
Major Python packages like Django and Twisted dropped Python 2.6 a while ago already.

Python 3.3 never had a significant user base and wasn't part of any distribution's LTS release.

Changes:
^^^^^^^^

__slots__ have arrived!
Classes now can automatically be slotted <https://docs.python.org/3/reference/datamodel.htmlslots>-style (and save your precious memory) just by passing slots=True.
35 <https://github.com/python-attrs/attrs/issues/35>
Allow the case of initializing attributes that are set to init=False.
This allows for clean initializer parameter lists while being able to initialize attributes to default values.
32 <https://github.com/python-attrs/attrs/issues/32>_
attr.asdict() can now produce arbitrary mappings instead of Python dict\ s when provided with a dict_factory argument.
40 <https://github.com/python-attrs/attrs/issues/40>_
Multiple performance improvements.

attrs 15.2.0

Changes:
^^^^^^^^

Added a convert argument to attr.ib, which allows specifying a function to run on arguments.
This allows for simple type conversions, e.g. with attr.ib(convert=int).
26 <https://github.com/python-attrs/attrs/issues/26>_
Speed up object creation when attribute validators are used.
28 <https://github.com/python-attrs/attrs/issues/28>_

attrs 15.1.0

Changes:
^^^^^^^^

Added attr.validators.optional() that wraps other validators allowing attributes to be None.
16 <https://github.com/python-attrs/attrs/issues/16>_
Multi-level inheritance now works.
24 <https://github.com/python-attrs/attrs/issues/24>_
__repr__() now works with non-redecorated subclasses.
20 <https://github.com/python-attrs/attrs/issues/20>_

attrs 15.0.0

Changes:
^^^^^^^^

Initial release.

codecov · 2020-03-30T11:40:04Z

Codecov Report

Merging #7135 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7135      +/-   ##
==========================================
- Coverage   45.64%   45.63%   -0.01%     
==========================================
  Files         276      276              
  Lines       13833    13833              
  Branches     2073     2073              
==========================================
- Hits         6314     6313       -1     
  Misses       7225     7225              
- Partials      294      295       +1

Impacted Files	Coverage Δ
decksite/league.py	`34.32% <0%> (-0.34%)`	⬇️

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vorpal-buildbot · 2020-03-30T11:40:43Z

Seen on LOGS (created by @pyup-bot and merged by @mergify[bot] 14 seconds ago) Please check your changes!

vorpal-buildbot · 2020-03-30T11:57:25Z

Seen on PROD (created by @pyup-bot and merged by @mergify[bot] 16 minutes and 55 seconds ago) Please check your changes!

Pin attrs to latest version 19.3.0

8ec1d2e

mergify bot merged commit 43f42b2 into master Mar 30, 2020

vorpal-buildbot added Pending-on-LOGS Used by the build bot Pending-on-PROD Used by the build bot Seen-on-LOGS and removed Pending-on-LOGS Used by the build bot labels Mar 30, 2020

vorpal-buildbot added Seen-on-PROD and removed Pending-on-PROD Used by the build bot labels Mar 30, 2020

silasary deleted the pyup-pin-attrs-19.3.0 branch June 9, 2020 06:39

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Pin attrs to latest version 19.3.0 #7135

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Pin attrs to latest version 19.3.0 #7135

Pin attrs to latest version 19.3.0 #7135

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pyup-bot commented Mar 30, 2020

19.3.0

19.2.0

19.1.0

18.2.0

18.1.0

17.4.0

17.3.0

17.2.0

17.1.0

16.3.0

16.2.0

16.1.0

16.0.0

15.2.0

15.1.0

15.0.0

vorpal-buildbot commented Mar 30, 2020

Changelogs

attrs 19.3.0

attrs 19.2.0

attrs 19.1.0

attrs 18.2.0

attrs 18.1.0

attrs 17.4.0

attrs 17.3.0

attrs 17.2.0

attrs 17.1.0

attrs 16.3.0

attrs 16.2.0

attrs 16.1.0

attrs 16.0.0

attrs 15.2.0

attrs 15.1.0

attrs 15.0.0

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