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ChangeLog
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===================
astroid's ChangeLog
===================
What's New in astroid 2.2.1?
============================
Release Date: 2019-03-02
* Make sure to infer the arguments to the `slice()` builtin
Close PyCQA/pylint#2770
* Correctly instantiate exception instances when inferring their attributes with objectmodel
Close PyCQA/pylint#2776
What's New in astroid 2.2.0?
============================
Release Date: 2019-02-27
* Fix a bug concerning inference of calls to numpy function that should not return Tuple or List instances.
Close PyCQA/pylint#2436
* ``typed_ast`` gets installed for Python 3.7, meaning type comments can now work on 3.7.
* Fix a bug concerning inference of unary operators on numpy types.
Close PyCQA/pylint#2436 (first part)
* Fix a crash with ``typing.NamedTuple`` and empty fields. Close PyCQA/pylint#2745
* Add a proper ``strerror`` inference to the ``OSError`` exceptions.
Close PyCQA/pylint#2553
* Support non-const nodes as values of Enum attributes.
Close #612
* Fix a crash in the ``enum`` brain tip caused by non-assign members in class definitions.
Close PyCQA/pylint#2719
* ``brain_numpy`` returns an undefined type for ``numpy`` methods to avoid ``assignment-from-no-return``
Close PyCQA/pylint#2694
* Fix a bug where a call to a function that has been previously called via
functools.partial was wrongly inferred
Close PyCQA/pylint#2588
* Fix a recursion error caused by inferring the ``slice`` builtin.
Close PyCQA/pylint#2667
* Remove the restriction that "old style classes" cannot have a MRO.
This does not make sense any longer given that we run against Python 3
code.
Close PyCQA/pylint#2701
* Added more builtin exceptions attributes. Close #580
* Add a registry for builtin exception models. Close PyCQA/pylint#1432
* Add brain tips for `http.client`. Close PyCQA/pylint#2687
* Prevent crashing when processing ``enums`` with mixed single and double quotes.
Close PyCQA/pylint#2676
* ``typing`` types have the `__args__` property. Close PyCQA/pylint#2419
* Fix a bug where an Attribute used as a base class was triggering a crash
Close #626
* Added special support for `enum.IntFlag`
Close PyCQA/pylint#2534
* Extend detection of data classes defined with attr
Close #628
* Fix typo in description for brain_attrs
What's New in astroid 2.1.0?
============================
Release Date: 2018-11-25
* ``threading.Lock.acquire`` has the ``timeout`` parameter now.
Close PyCQA/pylint#2457
* Pass parameters by keyword name when inferring sequences.
Close PyCQA/pylint#2526
* Correct line numbering for f-strings for complex embedded expressions
When a f-string contained a complex expression, such as an attribute access,
we weren't cloning all the subtree of the f-string expression for attaching the correct
line number. This problem is coming from the builtin AST parser which gives for the f-string
and for its underlying elements the line number 1, but this is causing all sorts of bugs and
problems in pylint, which expects correct line numbering.
Close PyCQA/pylint#2449
* Add support for `argparse.Namespace`
Close PyCQA/pylint#2413
* `async` functions are now inferred as `AsyncGenerator` when inferring their call result.
* Filter out ``Uninferable`` when inferring the call result result of a class with an uninferable ``__call__`` method.
Close PyCQA/pylint#2434
* Make compatible with AST changes in Python 3.8.
* Subscript inference (e.g. "`a[i]`") now pays attention to multiple inferred values for value
(e.g. "`a`") and slice (e.g. "`i`")
Close #614
What's New in astroid 2.0.4?
============================
Release Date: 2018-08-10
* Make sure that assign nodes can find ``yield`` statements in their values
Close PyCQA/pylint#2400
What's New in astroid 2.0.3?
============================
Release Date: 2018-08-08
* The environment markers for PyPy were invalid.
What's New in astroid 2.0.2?
============================
Release Date: 2018-08-01
* Stop repeat inference attempt causing a RuntimeError in Python3.7
Close PyCQA/pylint#2317
* infer_call_result can raise InferenceError so make sure to handle that for the call sites
where it is used
infer_call_result started recently to raise InferenceError for objects for which it
could not find any returns. Previously it was silently raising a StopIteration,
which was especially leaking when calling builtin methods.
Since it is after all an inference method, it is expected that it
could raise an InferenceError rather than returning nothing.
Close PyCQA/pylint#2350
What's New in astroid 2.0.1?
============================
Release Date: 2018-07-19
* Released to clear an old wheel package on PyPI
What's New in astroid 2.0?
==========================
Release Date: 2018-07-15
* String representation of nodes takes in account precedence and associativity rules of operators.
* Fix loading files with `modutils.load_from_module` when
the path that contains it in `sys.path` is a symlink and
the file is contained in a symlinked folder.
Close #583
* Reworking of the numpy brain dealing with numerictypes
(use of inspect module to determine the class hierarchy of
numpy.core.numerictypes module)
Close PyCQA/pylint#2140
* Added inference support for starred nodes in for loops
Close #146
* Support unpacking for dicts in assignments
Close #268
* Add support for inferring functools.partial
Close #125
* Inference support for `dict.fromkeys`
Close #110
* `int()` builtin is inferred as returning integers.
Close #150
* `str()` builtin is inferred as returning strings.
Close #148
* DescriptorBoundMethod has the correct number of arguments defined.
* Improvement of the numpy numeric types definition.
Close PyCQA/pylint#1971
* Subclasses of *property* are now interpreted as properties
Close PyCQA/pylint#1601
* AsStringRegexpPredicate has been removed.
Use transform predicates instead of it.
* Switched to using typed_ast for getting access to type comments
As a side effect of this change, some nodes gained a new `type_annotation` attribute,
which, if the type comments were correctly parsed, should contain a node object
with the corresponding objects from the type comment.
* typing.X[...] and typing.NewType are inferred as classes instead of instances.
* Module.__path__ is now a list
It used to be a string containing the path, but it doesn't reflect the situation
on Python, where it is actually a list.
* Fix a bug with namespace package's __path__ attribute.
Close #528
* Added brain tips for random.sample
Part of PyCQA/pylint#811
* Add brain tip for `issubclass` builtin
Close #101.
* Fix submodule imports from six
Close PyCQA/pylint#1640
* Fix missing __module__ and __qualname__ from class definition locals
Close PYCQA/pylint#1753
* Fix a crash when __annotations__ access a parent's __init__ that does not have arguments
Close #473
* Fix multiple objects sharing the same InferenceContext.path causing uninferable results
Close #483
* Fix improper modification of col_offset, lineno upon inference of builtin functions
Close PyCQA/pylint#1839
* Subprocess.Popen brain now knows of the args member
Close PyCQA/pylint#1860
* add move_to_end method to collections.OrderedDict brain
Close PyCQA/pylint#1872
* Include new hashlib classes added in python 3.6
* Fix RecursionError for augmented assign
Close #437, #447, #313, PyCQA/pylint#1642, PyCQA/pylint#1805, PyCQA/pylint#1854, PyCQA/pylint#1452
* Add missing attrs special attribute
Close PyCQA/pylint#1884
* Inference now understands the 'isinstance' builtin
Close #98
* Stop duplicate nodes with the same key values
from appearing in dictionaries from dictionary unpacking.
Close PyCQA/pylint#1843
* Fix ``contextlib.contextmanager`` inference for nested context managers
Close #1699
* Implement inference for len builtin
Close #112
* Add qname method to Super object preventing potential errors in upstream
pylint
Close #533
* Stop astroid from getting stuck in an infinite loop if a function shares
its name with its decorator
Close #375
* Fix issue with inherited __call__ improperly inferencing self
Close #PyCQA/pylint#2199
* Fix __call__ precedence for classes with custom metaclasses
Close PyCQA/pylint#2159
* Limit the maximum amount of interable result in an NodeNG.infer() call to
100 by default for performance issues with variables with large amounts of
possible values.
The max inferable value can be tuned by setting the `max_inferable_values` flag on
astroid.MANAGER.
What's New in astroid 1.6.0?
============================
Release Date: 2017-12-15
* When verifying duplicates classes in MRO, ignore on-the-fly generated classes
Close PyCQA/pylint#1706
* Add brain tip for attrs library to prevent unsupported-assignment-operation false positives
Close PYCQA/pylint#1698
* file_stream was removed, since it was deprecated for three releases
Instead one should use the .stream() method.
* Vast improvements to numpy support
* Add brain tips for curses
Close PyCQA/pylint#1703
* Add brain tips for UUID.int
Close PyCQA/pylint#961
* The result of using object.__new__ as class decorator is correctly inferred as instance
Close #172
* Enums created with functional syntax are now iterable
* Enums created with functional syntax are now subscriptable
* Don't crash when getting the string representation of BadUnaryOperationMessage
In some cases, when the operand does not have a .name attribute,
getting the string representation of a BadUnaryOperationMessage leads
to a crash.
Close PyCQA/pylint#1563
* Don't raise DuplicateBaseError when classes at different locations are used
For instance, one can implement a namedtuple base class, which gets reused
on a class with the same name later on in the file. Until now, we considered
these two classes as being the same, because they shared the name, but in fact
they are different, being created at different locations and through different
means.
Close PyCQA/pylint#1458
* The func form of namedtuples with keywords is now understood
Close PyCQA/pylint#1530
* Fix inference for nested calls
* Dunder class at method level is now inferred as the class of the method
Close PyCQA/pylint#1328
* Stop most inference tip overwrites from happening by using
predicates on existing inference_tip transforms.
Close #472
* Fix object.__new__(cls) calls in classmethods by using
a context which has the proper boundnode for the given
argument
Close #404
* Fix Pathlib type inference
Close PyCQA/pylint#224
Close PyCQA/pylint#1660
What's New in astroid 1.5.3?
============================
Release Date: 2017-06-03
* enum34 dependency is forced to be at least version 1.1.3. Fixes spurious
bug related to enum classes being falsy in boolean context, which caused
_Inconsistent Hierarchy_ `RuntimeError` in `singledispatch` module.
See links below for details:
- http://bugs.python.org/issue26748
- https://bitbucket.org/ambv/singledispatch/issues/8/inconsistent-hierarchy-with-enum
- https://bitbucket.org/stoneleaf/enum34/commits/da50803651ab644e6fce66ebc85562f1117c344b
* Do not raise an exception when uninferable value is unpacked in ``with`` statement.
* Lock objects from ``threading`` module are now correctly recognised
as context managers.
What's New in astroid 1.5.2?
============================
Release Date: 2017-04-17
* Basic support for the class form of typing.NamedTuple
* mro() can be computed for classes with old style classes in the hierarchy
What's New in astroid 1.5.0?
============================
Release Date: 2017-04-13
* Arguments node gained a new attribute, ``kwonlyargs_annotations``
This new attribute holds the annotations for the keyword-only
arguments.
* `namedtuple` inference now understands `rename` keyword argument
* Classes can now know their definition-time arguments.
Classes can support keyword arguments, which are passed when
a class is constructed using ``__new__``.
* Add support for inferring typing.NamedTuple.
* ClassDef now supports __getitem__ inference through the metaclass.
* getitem() method accepts nodes now, instead of Python objects.
* Add support for explicit namespace packages, created with pkg_resources.
* Add brain tips for _io.TextIOWrapper's buffer and raw attributes.
* Add `returns` into the proper order in FunctionDef._astroid_fields
The order is important, since it determines the last child,
which in turn determines the last line number of a scoped node.
* Add brain tips for functools.lru_cache.
* New function, astroid.extract_node, exported out from astroid.test_utils.
* Stop saving assignment locals in ExceptHandlers, when the context is a store.
This fixes a tripping case, where the RHS of a ExceptHandler can be redefined
by the LHS, leading to a local save. For instance, ``except KeyError, exceptions.IndexError``
could result in a local save for IndexError as KeyError, resulting in potential unexpected
inferences. Since we don't lose a lot, this syntax gets prohibited.
* Fix a crash which occurred when the class of a namedtuple could not be inferred.
* Add support for implicit namespace packages (PEP 420)
This change involves a couple of modifications. First, we're relying on a
spec finder protocol, inspired by importlib's ModuleSpec, for finding where
a file or package is, using importlib's PathFinder as well, which enable
us to discover namespace packages as well.
This discovery is the center piece of the namespace package support,
the other part being the construction of a dummy Module node whenever
a namespace package root directory is requested during astroid's import
references.
* Introduce a special attributes model
Through this model, astroid starts knowing special attributes of certain Python objects,
such as functions, classes, super objects and so on. This was previously possible before,
but now the lookup and the attributes themselves are separated into a new module,
objectmodel.py, which describes, in a more comprehensive way, the data model of each
object.
* Exceptions have their own object model
Some of exceptions's attributes, such as .args and .message,
can't be inferred correctly since they are descriptors that get
transformed into the proper objects at runtime. This can cause issues
with the static analysis, since they are inferred as different than
what's expected. Now when we're creating instances of exceptions,
we're inferring a special object that knows how to transform those
runtime attributes into the proper objects via a custom object model.
Closes issue #81
* dict.values, dict.keys and dict.items are properly
inferred to their corresponding type, which also
includes the proper containers for Python 3.
* Fix a crash which occurred when a method had a same name as a builtin object,
decorated at the same time by that builtin object ( a property for instance)
* The inference can handle the case where the attribute is accessed through a subclass
of a base class and the attribute is defined at the base class's level,
by taking in consideration a redefinition in the subclass.
This should fix https://github.com/PyCQA/pylint/issues/432
* Calling lambda methods (defined at class level) can be understood.
* Don't take in consideration invalid assignments, especially when __slots__
declaration forbids them.
Close issue #332
* Functional form of enums support accessing values through __call__.
* Brain tips for the ssl library.
* decoratornames() does not leak InferenceError anymore.
* wildcard_imported_names() got replaced by _public_names()
Our understanding of wildcard imports through __all__ was
half baked to say at least, since we couldn't account for
modifications of the list, which results in tons of false positives.
Instead, we replaced it with _public_names(), a method which returns
all the names that are publicly available in a module, that is that
don't start with an underscore, even though this means that there
is a possibility for other names to be leaked out even though
they are not present in the __all__ variable.
The method is private in 1.4.X.
* unpack_infer raises InferenceError if it can't operate
with the given sequences of nodes.
* Support accessing properties with super().
* Enforce strong updates per frames.
When looking up a name in a scope, Scope.lookup will return
only the values which will be reachable after execution, as seen
in the following code:
a = 1
a = 2
In this case it doesn't make sense to return two values, but
only the last one.
* Add support for inference on threading.Lock
As a matter of fact, astroid can infer on threading.RLock,
threading.Semaphore, but can't do it on threading.Lock (because it comes
from an extension module).
* pkg_resources brain tips are a bit more specific,
by specifying proper returns.
* The slots() method conflates all the slots from the ancestors
into a list of current and parent slots.
We're doing this because this is the right semantics of slots,
they get inherited, as long as each parent defines a __slots__
entry.
* Some nodes got a new attribute, 'ctx', which tells in which context
the said node was used.
The possible values for the contexts are `Load` ('a'), `Del`
('del a'), `Store` ('a = 4') and the nodes that got the new
attribute are Starred, Subscript, List and Tuple. Closes issue #267.
* relative_to_absolute_name or methods calling it will now raise
TooManyLevelsError when a relative import was trying to
access something beyond the top-level package.
* AstroidBuildingException is now AstroidBuildingError. The first
name will exist until astroid 2.0.
* Add two new exceptions, AstroidImportError and AstroidSyntaxError.
They are subclasses of AstroidBuildingException and are raised when
a module can't be imported from various reasons.
Also do_import_module lets the errors to bubble up without converting
them to InferenceError. This particular conversion happens only
during the inference.
* Revert to using printf-style formatting in as_string, in order
to avoid a potential problem with encodings when using .format.
Closes issue #273. Patch by notsqrt.
* assigned_stmts methods have the same signature from now on.
They used to have different signatures and each one made
assumptions about what could be passed to other implementations,
leading to various possible crashes when one or more arguments
weren't given. Closes issue #277.
* Fix metaclass detection, when multiple keyword arguments
are used in class definition.
* Add support for annotated variable assignments (PEP 526)
* Starred expressions are now inferred correctly for tuple,
list, set, and dictionary literals.
* Support for asynchronous comprehensions introduced in Python 3.6.
Fixes #399. See PEP530 for details.
What's New in astroid 1.4.1?
============================
Release Date: 2015-11-29
* Add support for handling Uninferable nodes when calling as_string
Some object, for instance List or Tuple can have, after inference,
Uninferable as their elements, happening when their components
weren't couldn't be inferred properly. This means that as_string
needs to cope with expecting Uninferable nodes part of the other
nodes coming for a string transformation. The patch adds a visit
method in AsString and ``accept`` on Yes / Uninferable nodes.
Closes issue #270.
What's New in astroid 1.4.0?
============================
Release Date: 2015-11-29
* Class.getattr('__mro__') returns the actual MRO. Closes issue #128.
* The logilab-common dependency is not needed anymore as the needed code
was integrated into astroid.
* Generated enum member stubs now support IntEnum and multiple
base classes.
* astroid.builder.AstroidBuilder.string_build and
astroid.builder.AstroidBuilder.file_build are now raising
AstroidBuildingException when the parsing of the string raises
a SyntaxError.
* Add brain tips for multiprocessing.Manager and
multiprocessing.managers.SyncManager.
* Add some fixes which enhances the Jython support.
The fix mostly includes updates to modutils, which is
modified in order to properly lookup paths from live objects,
which ends in $py.class, not pyc as for Python 2,
Closes issue #83.
* The Generator objects inferred with `infer_call_result`
from functions have as parent the function from which they
are returned.
* Add brain tips for multiprocessing post Python 3.4+,
where the module level functions are retrieved with getattr
from a context object, leading to many no-member errors
in Pylint.
* Understand partially the 3-argument form of `type`.
The only change is that astroid understands members
passed in as dictionaries as the third argument.
* .slots() will return an empty list for classes with empty slots.
Previously it returned None, which is the same value for
classes without slots at all. This was changed in order
to better reflect what's actually happening.
* Improve the inference of Getattr nodes when dealing with
abstract properties from the abc module.
In astroid.bases.Instance._wrap_attr we had a detection
code for properties, which basically inferred whatever
a property returned, passing the results up the stack,
to the igetattr() method. It handled only the builtin property
but the new patch also handles a couple of other properties,
such as abc.abstractproperty.
* UnboundMethod.getattr calls the getattr of its _proxied object
and doesn't call super(...) anymore.
It previously crashed, since the first ancestor in its mro was
bases.Proxy and bases.Proxy doesn't implement the .getattr method.
Closes issue #91.
* Don't hard fail when calling .mro() on a class which has
combined both newstyle and old style classes. The class
in question is actually newstyle (and the __mro__ can be
retrieved using Python).
.mro() fallbacks to using .ancestors() in that case.
* Class.local_attr and Class.local_attr_ancestors uses internally
a mro lookup, using .mro() method, if they can.
That means for newstyle classes, when trying to lookup a member
using one of these functions, the first one according to the
mro will be returned. This reflects nicely the reality,
but it can have as a drawback the fact that it is a behaviour
change (the previous behaviour was incorrect though). Also,
having bases which can return multiple values when inferred
will not work with the new approach, because .mro() only
retrieves the first value inferred from a base.
* Expose an implicit_metaclass() method in Class. This will return
a builtins.type instance for newstyle classes.
* Add two new exceptions for handling MRO error cases. DuplicateBasesError
is emitted when duplicate bases are found in a class,
InconsistentMroError is raised when the method resolution is determined
to be inconsistent. They share a common class, MroError, which
is a subclass of ResolveError, meaning that this change is backwards
compatible.
* Classes aren't marked as interfaces anymore, in the `type` attribute.
* Class.has_dynamic_getattr doesn't return True for special methods
which aren't implemented in pure Python, as it is the case for extension modules.
Since most likely the methods were coming from a live object, this implies
that all of them will have __getattr__ and __getattribute__ present and it
is wrong to consider that those methods were actually implemented.
* Add basic support for understanding context managers.
Currently, there's no way to understand whatever __enter__ returns in a
context manager and what it is binded using the ``as`` keyword. With these changes,
we can understand ``bar`` in ``with foo() as bar``, which will be the result of __enter__.
* Add a new type of node, called *inference objects*. Inference objects are similar with
AST nodes, but they can be obtained only after inference, so they can't be found
inside the original AST tree. Their purpose is to handle at astroid level
some operations which can't be handled when using brain transforms.
For instance, the first object added is FrozenSet, which can be manipulated
at astroid's level (inferred, itered etc). Code such as this 'frozenset((1,2))'
will not return an Instance of frozenset, without having access to its
content, but a new objects.FrozenSet, which can be used just as a nodes.Set.
* Add a new *inference object* called Super, which also adds support for understanding
super calls. astroid understands the zero-argument form of super, specific to
Python 3, where the interpreter fills itself the arguments of the call. Also, we
are understanding the 2-argument form of super, both for bounded lookups
(super(X, instance)) as well as for unbounded lookups (super(X, Y)),
having as well support for validating that the object-or-type is a subtype
of the first argument. The unbounded form of super (one argument) is not
understood, since it's useless in practice and should be removed from
Python's specification. Closes issue #89.
* Add inference support for getattr builtin. Now getattr builtins are
properly understood. Closes issue #103.
* Add inference support for hasattr builtin. Closes issue #102.
* Add 'assert_equals' method in nose.tools's brain plugin.
* Don't leak StopIteration when inferring invalid UnaryOps (+[], +None etc.).
* Improve the inference of UnaryOperands.
When inferring unary operands, astroid looks up the return value
of __pos__, __neg__ and __invert__ to determine the inferred value
of ``~node``, ``+node`` or ``-node``.
* Improve the inference of six.moves, especially when using `from ... import ...`
syntax. Also, we added a new fail import hook for six.moves, which fixes the
import-error false positive from pylint. Closes issue #107.
* Make the first steps towards detecting type errors for unary and binary
operations.
In exceptions, one object was added for holding information about a possible
UnaryOp TypeError, object called `UnaryOperationError`. Even though the name
suggests it's an exception, it's actually not one. When inferring UnaryOps,
we use this special object to mark a possible TypeError,
object which can be interpreted by pylint in order to emit a new warning.
We are also exposing a new method for UnaryOps, called `type_errors`,
which returns a list of UnaryOperationsError.
* A new method was added to the AST nodes, 'bool_value'. It is used to deduce
the value of a node when used in a boolean context, which is useful
for both inference, as well as for data flow analysis, where we are interested
in what branches will be followed when the program will be executed.
`bool_value` returns True, False or YES, if the node's boolean value can't
be deduced. The method is used when inferring the unary operand `not`.
Thus, `not something` will result in calling `something.bool_value` and
negating the result, if it is a boolean.
* Add inference support for boolean operations (`and` and `not`).
* Add inference support for the builtin `callable`.
* astroid.inspector was moved to pylint.pyreverse, since
it is the only known client of this module. No other change
was made to the exported API.
* astroid.utils.ASTWalker and astroid.utils.LocalsVisitor
were moved to pylint.pyreverse.utils.
* Add inference support for the builtin `bool`.
* Add `igetattr` method to scoped_nodes.Function.
* Add support for Python 3.5's MatMul operation: see PEP 465 for more
details.
* NotImplemented is detected properly now as being part of the
builtins module. Previously trying to infer the Name(NotImplemented)
returned an YES object.
* Add astroid.helpers, a module of various useful utilities which don't
belong yet into other components. Added *object_type*, a function
which can be used to obtain the type of almost any astroid object,
similar to how the builtin *type* works.
* Understand the one-argument form of the builtin *type*.
This uses the recently added *astroid.helpers.object_type* in order to
retrieve the Python type of the first argument of the call.
* Add helpers.is_supertype and helpers.is_subtype, two functions for
checking if an object is a super/sub type of another.
* Improve the inference of binary arithmetic operations (normal
and augmented).
* Add support for retrieving TypeErrors for binary arithmetic operations.
The change is similar to what was added for UnaryOps: a new method
called *type_errors* for both AugAssign and BinOp, which can be used
to retrieve type errors occurred during inference. Also, a new
exception object was added, BinaryOperationError.
* Lambdas found at class level, which have a `self` argument, are considered
BoundMethods when accessing them from instances of their class.
* Add support for multiplication of tuples and lists with instances
which provides an __index__ returning-int method.
* Add support for indexing containers with instances which provides
an __index__ returning-int method.
* Star unpacking in assignments returns properly a list,
not the individual components. Closes issue #138.
* Add annotation support for function.as_string(). Closes issue #37.
* Add support for indexing bytes on Python 3.
* Add support for inferring subscript on instances, which will
use __getitem__. Closes issue #124.
* Add support for pkg_resources.declare_namespaces.
* Move pyreverse specific modules and functionality back into pyreverse
(astroid.manager.Project, astroid.manager.Manager.project_from_files).
* Understand metaclasses added with six.add_metaclass decorator. Closes issue #129.
* Add a new convenience API, `astroid.parse`, which can be used to retrieve
an astroid AST from a source code string, similar to how ast.parse can be
used to obtain a Python AST from a source string. This is the test_utils.build_module
promoted to a public API.
* do_import_module passes the proper relative_only flag if the level is higher
than 1. This has the side effect that using `from .something import something`
in a non-package will finally result in an import-error on Pylint's side.
Until now relative_only was ignored, leading to the import of `something`,
if it was globally available.
* Add get_wrapping_class API to scoped_nodes, which can be used to
retrieve the class that wraps a node.
* Class.getattr looks by default in the implicit and the explicit metaclasses,
which is `type` on Python 3.
Closes issue #114.
* There's a new separate step for transforms.
Until now, the transforms were applied at the same time the tree was
being built. This was problematic if the transform functions were
using inference, since the inference was executed on a partially
constructed tree, which led to failures when post-building
information was needed (such as setting the _from_names
for the From imports).
Now there's a separate step for transforms, which are applied
using transform.TransformVisitor.
There's a couple of other related changes:
* astroid.parse and AstroidBuilder gained a new parameter
`apply_transforms`, which is a boolean flag, which will
control if the transforms are applied. We do this because
there are uses when the vanilla tree is wanted, without
any implicit modification.
* the transforms are also applied for builtin modules,
as a side effect of the fact that transform visiting
was moved in AstroidBuilder._post_build from
AstroidBuilder._data_build.
Closes issue #116.
* Class._explicit_metaclass is now a public API, in the form of
Class.declared_metaclass.
Class.mro remains the de facto method for retrieving the metaclass
of a class, which will also do an evaluation of what declared_metaclass
returns.
* Understand slices of tuples, lists, strings and instances with support
for slices.
Closes issue #137.
* Add proper grammatical names for `inferred` and `ass_type` methods,
namely `inferred` and `assign_type`.
The old methods will raise PendingDeprecationWarning, being slated
for removal in astroid 2.0.
* Add new AST names in order to be similar to the ones
from the builtin ast module.
With this change, Getattr becomes Attributes, Backquote becomes
Repr, Class is ClassDef, Function is FunctionDef, Discard is Expr,
CallFunc is Call, From is ImportFrom, AssName is AssignName
and AssAttr is AssignAttr. The old names are maintained for backwards
compatibility and they are interchangeable, in the sense that using
Discard will use Expr under the hood and the implemented visit_discard
in checkers will be called with Expr nodes instead. The AST does not
contain the old nodes, only the interoperability between them hides this
fact. Recommendations to move to the new nodes are emitted accordingly,
the old names will be removed in astroid 2.0.
* Add support for understanding class creation using `type.__new__(mcs, name, bases, attrs)``
Until now, inferring this kind of calls resulted in Instances, not in classes,
since astroid didn't understand that the presence of the metaclass in the call
leads to a class creating, not to an instance creation.
* Understand the `slice` builtin. Closes issue #184.
* Add brain tips for numpy.core, which should fix Pylint's #453.
* Add a new node, DictUnpack, which is used to represent the unpacking
of a dictionary into another dictionary, using PEP 448 specific syntax
({1:2, **{2:3})
This is a different approach than what the builtin ast module does,
since it just uses None to represent this kind of operation,
which seems conceptually wrong, due to the fact the AST contains
non-AST nodes. Closes issue #206.
What's New in astroid 1.3.6?
============================