Update pylint to 2.4.2

[pyup-bot]

This PR updates pylint from 1.7.1 to 2.4.2.

Changelog

2.4.2

===========================

Release date: 2019-09-30


* ``ignored-modules`` can skip submodules. Close 3135

* ``self-assigning-variable`` skips class level assignments.

Close 2930

* ``consider-using-sys-exit`` is exempted when `exit()` is imported from `sys`

Close 3145

* Exempt annotated assignments without variable from ``class-variable-slots-conflict``

Close 3141

* Fix ``utils.is_error`` to account for functions returning early.

This fixes a false negative with ``unused-variable`` which was no longer triggered
when a function raised an exception as the last instruction, but the body of the function
still had unused variables.

Close 3028

2.4.1

===========================

Release date: 2019-09-25


* Exempt type checking definitions defined in both clauses of a type checking guard

Close 3127


* Exempt type checking definitions inside the type check guard

In a7f236528bb3758886b97285a56f3f9ce5b13a99 we added basic support
for emitting `used-before-assignment` if a variable was only defined
inside a type checking guard (using `TYPE_CHECKING` variable from `typing`)
Unfortunately that missed the case of using those type checking imports
inside the guard itself, which triggered spurious used-before-assignment errors.

Close 3119

* Require astroid >= 2.3 to avoid any compatibility issues.

2.4.0

===========================

Release date: 2019-09-24

* New check: ``import-outside-toplevel``

This check warns when modules are imported from places other than a
module toplevel, e.g. inside a function or a class.

* Handle inference ambiguity for ``invalid-format-index``

Close 2752

* Removed Python 2 specific checks such as ``relative-import``,
``invalid-encoded-data``, ``missing-super-argument``.

* Support forward references for ``function-redefined`` check.

Close 2540

* Handle redefinitions in case of type checking imports.

Close 2834

* Added a new check, ``consider-using-sys-exit``

This check is emitted when we detect that a quit() or exit() is invoked
instead of sys.exit(), which is the preferred way of exiting in program.

Close 2925

* ``useless-suppression`` check now ignores ``cyclic-import`` suppressions,
which could lead to false postiives due to incomplete context at the time
of the check.

Close 3064

* Added new checks, ``no-else-break`` and ``no-else-continue``

These checks highlight unnecessary ``else`` and ``elif`` blocks after
``break`` and ``continue`` statements.

Close 2327

* Don't emit ``protected-access`` when a single underscore prefixed attribute
is used inside a special method

Close 1802

* Fix the "statement" values in the PyLinter's stats reports by module.

* Added a new check, ``invalid-overridden-method``

This check is emitted when we detect that a method is overridden
as a property or a property is overridden as a method. This can indicate
a bug in the application code that will trigger a runtime error.

Close 2670

* Added a new check, ``arguments-out-of-order``

This check warns if you have arguments with names that match those in
a function's signature but you are passing them in to the function
in a different order.

Close 2975

* Added a new check, ``redeclared-assigned-name``

This check is emitted when ``pylint`` detects that a name
was assigned one or multiple times in the same assignment,
which indicate a potential bug.
Close 2898

* Ignore lambda calls with variadic arguments without a context.

Inferring variadic positional arguments and keyword arguments
will result into empty Tuples and Dicts, which can lead in
some cases to false positives with regard to no-value-for-parameter.
In order to avoid this, until we'll have support for call context
propagation, we're ignoring such cases if detected.
We already did that for function calls, but the previous fix
was not taking in consideration ``lambdas``

Close 2918

* Added a new check, ``self-assigning-variable``

This check is emitted when we detect that a variable is assigned
to itself, which might indicate a potential bug in the code application.
Close 2930

* Added a new check, ``property-with-parameters``.

This check is emitted when we detect that a defined property also
has parameters, which are useless.
Close 3006

* Excluded protocol classes from a couple of checks. Close 3002.

* Add a check `unnecessary-comprehension` that detects unnecessary comprehensions.

This check is emitted when ``pylint`` finds list-, set- or dict-comprehensions,
that are unnecessary and can be rewritten with the list-, set- or dict-constructors.

Close 2905

* Excluded PEP 526 instance and class variables from ``no-member``. Close 2945

* Excluded `attrs` from `too-few-public-methods` check. Close 2988.

* ``unused-import`` emitted for the right import names in function scopes.

Close 2928

* Dropped support for Python 3.4.

* ``assignment-from-no-return`` not triggered for async methods.

Close 2902

* Don't emit ``attribute-defined-outside-init`` for variables defined in setters.

Close 409

* Syntax errors report the column number.

Close 2914

* Support fully qualified typing imports for type annotations.

Close 2915

* Exclude ``__dict__`` from ``attribute-defined-outside-init``

* Fix pointer on spelling check when the error are more than one time in the same line.

Close 2895

* Fix crash happening when parent of called object cannot be determined

* Allow of in `GoogleDocstring.re_multiple_type`

* Added `subprocess-run-check` to handle subrocess.run without explicitly set `check` keyword.

Close 2848

* When we can't infer bare except handlers, skip ``try-except-raise``

Close 2853

* Handle more `unnecessary-lambda` cases when dealing with additional kwargs in wrapped calls

Close 2845

* Better postponed evaluation of annotations handling

Close 2847

* Support postponed evaluation of annotations for variable annotations.

Close 2838

* ``epylint.py_run`` defaults to ``python`` in case the current executable is not a Python one.

Close 2837

* Ignore raw docstrings when running Similarities checker with `ignore-docstrings=yes` option

* Fix crash when calling ``inherit_from_std_ex`` on a class which is its own ancestor

Close 2680

* Added a new check that warns the user if a function call is used inside a test but parentheses are missing.

Close 2658

* ``len-as-condition`` now only fires when a ``len(x)`` call is made without an explicit comparison

The message and description accompanying this checker has been changed
reflect this new behavior, by explicitly asking to either rely on the
fact that empty sequence are false or to compare the length with a scalar.

Close 2684

* Add ``preferred-module`` checker that notify if an import has a replacement module that should be used.

This check is emitted when ``pylint`` finds an imported module that has a
preferred replacement listed in ``preferred-modules``.

* ``assigning-non-slot`` not emitted for classes with unknown base classes.

Close 2807

* ``old-division`` is not emitted for non-Const nodes.

Close 2808

* Added method arguments to the dot writer for pyreverse.

Close 2139

* Support for linting file from stdin.

IDEs may benefit from the support for linting from an in-memory file.

Close 1187

* Added a new check `class-variable-slots-conflict`

This check is emitted when ``pylint`` finds a class variable that conflicts with a slot
name, which would raise a ``ValueError`` at runtime.

* Added new check: dict-iter-missing-items (E1141)

Close 2761

* Fix issue with pylint name in output of python -m pylint --version

Close 2764

* Relicense logo material under the CC BY-SA 4.0 license.

* Skip `if` expressions from f-strings for the `check_elif` checker

Close 2816

* C0412 (ungrouped-import) is now compatible with isort.

Close 2806

* Added new extension to detect too much code in a try clause

Close 2877

* ``signature-mutators`` option was added

With this option, users can choose to ignore `too-many-function-args`, `unexpected-keyword-arg`,
and `no-value-for-parameter` for functions decorated with decorators that change
the signature of a decorated function.

Close 259

* Fixed a pragma comment on its own physical line being ignored when part
of a logical line with the previous physical line.

Close 199

* Fixed false `undefined-loop-variable` for a function defined in the loop,
that uses the variable defined in that loop.

Close 202

* Fixed `unused-argument` and `function-redefined` getting raised for
functions decorated with `typing.overload`.

Close 1581

* Fixed a false positive with ``consider-using-dict-comprehension`` for constructions that can't be converted to a comprehension

Close 2963

* Added ``__post_init__`` to ``defining-attr-methods`` in order to avoid ``attribute-defined-outside-init`` in dataclasses.

Close 2581

* Changed description of W0199 to use the term 2-item-tuple instead of 2-uple.

* Allow a `.` as a prefix for Sphinx name resolution.

* Checkers must now keep a 1 to 1 relationship between "msgid" (ie: C1234) and "symbol" (ie : human-readable-symbol)
* In checkers, an old_names can now be used for multiple new messages and pylint is now a little faster

Caused by 1164. It means if you do a partial old_names for a message definition an exception will tell you that you
must rename the associated identification.

* Allow the choice of f-strings as a valid way of formatting logging strings.

Closes 2395

* Added ``--list-msgs-enabled`` command to list all enabled and disabled messages given the current RC file and command line arguments.

2.3.0

===========================

Release date: 2019-02-27

* Protect against `NonDeducibleTypeHierarchy` when calling semi-private `is_subtype`

`astroid.helpers.is_subtype` raises `NonDeducibleTypeHierarchy` when it cannot infer
the base classes of the given types, but that makes sense in its context given that
the method is mostly used to inform the inference process about the hierarchy of classes.
Doesn't make that much sense for ``pylint`` itself, which is why we're handling the
exception here, rather than in ``astroid``

Close PyCQA/astroid644

* Added a new command line option ``list-groups`` for listing all the check groups ``pylint`` knows about.

* Allow ``BaseException`` for emitting ``broad-except``, just like ``Exception``.

Close 2741

* Fixed a crash that occurred for ``bad-str-strip-call`` when ``strip()`` received ``None``

Close 2743

* Don't emit ``*-not-iterating`` checks for builtins consumed by ``itertools``

Close 2731

* Fix a crash caused by iterating over ``Uninferable`` in a string formatting check.

Close 2727

* Fixed false positives for ``no-self-argument`` and ``unsubscriptable-object`` when using ``__class_getitem__`` (new in Python 3.7)

Close 2416

* Support ``Ellipsis`` as a synonym for ``pass`` statements.

Close 2718

* ``fixme`` gets triggered only on comments.

Close 2321

* Fixed a false positive for ``unused-variable`` and ``nonlocal`` assignments

Close 2671

* Added ``load_configuration()`` hook for plugins

New optional hook for plugins is added: ``load_configuration()``.
This hook is executed after configuration is loaded to prevent
overwriting plugin specific configuration via user-based
configuration.

Close 2635

* Fix missing-raises-doc false positive (W9006)

Close 1502

* Exempt starred unpacking from ``*-not-iterating`` Python 3 checks

Close 2651

* Make ``compare-to-zero`` less zealous by checking against equality and identity

Close 2645

* Add ``no-else-raise`` warning (R1720)

Close 2558

* Exempt ``yield from`` from ``*-not-iterating`` Python 3 checks.

Close 2643

* Fix incorrect generation of ``no-else-return`` warnings (R1705)

Fixed issue where ``if`` statements with nested ``if`` statements
were incorrectly being flagged as ``no-else-return`` in some cases and
not being flagged as ``no-else-return`` in other cases.  Added tests
for verification and updated pylint source files to eliminate newly
exposed warnings.

* Fix false positive with `not-async-context-manager` caused by not understanding `contextlib.asynccontextmanager`

Close 2440

* Refactor ``bad-reversed-sequence`` to account for more objects that can define ``__reversed__``

One such object would be an enum class, for which ``__reversed__`` yields each individual enum.
As such, the check for ``bad-reversed-sequence`` needs to not differentiate between classes
and instances when it comes for checking of ``__reversed__`` presence.

Close 2598

* Added ``wrong-exception-operation``

Used when an operation is done against an exception, but the operation
is not valid for the exception in question. Usually emitted when having
binary operations between exceptions in except handlers.

Close 2494

* ``no-member`` is emitted for enums when they lack a member

Previously we weren't doing this because we detected a
``__getattr__`` implementation on the ``Enum`` class
(and this check is skipped for classes with ``__getattr__``),
but that is fine for Enums, given that they are inferred in a customised
way in astroid.

Close 2565

* Generalize ``chained-comparison``

Previous version incorrectly detects `a < b < c and b < d` and fails to
detect `a < b < c and c < d`.

* Avoid popping __main__ when using multiple jobs

Close 2689

* Add a new option 'check-str-concat-over-line-jumps' to check 'implicit-str-concat-in-sequence'

* Fixes for the new style logging format linter.

The number of arguments was not handled properly, leading to an always
successful check.

* Fix false positive ``not-callable`` for uninferable properties.

* Fix false positive ``useless-else-on-loop`` if the break is deep in the else
of an inner loop.

* Minor improvements to the help text for a few options.

2.2.2

===========================

Release date: 2018-11-28

* Change the ``logging-format-style`` to use name identifier instead of their
corresponding Python identifiers

This is to prevent users having to think about escaping the default value for
``logging-format-style`` in the generated config file. Also our config parsing
utilities don't quite support escaped values when it comes to ``choices`` detection,
so this would have needed various hacks around that.

Closes 2614

2.2.1

===========================

Release date: 2018-11-27

* Fix a crash caused by `implicit-str-concat-in-sequence` and multi-bytes characters.

Closes 2610

2.2

=========================

Release date: 2018-11-25

* Consider ``range()`` objects for ``undefined-loop-variable`` leaking from iteration.

  Close 2533

* ``deprecated-method`` can use the attribute name for identifying a deprecated method

  Previously we were using the fully qualified name, which we still do, but the fully
  qualified name for some ``unittest`` deprecated aliases leads to a generic
  deprecation function. Instead on relying on that, we now also rely on the attribute
  name, which should solve some false positives.

  Close 1653
  Close 1946

* Fix compatibility with changes to stdlib tokenizer.

* ``pylint`` is less eager to consume the whole line for pragmas

  Close 2485

* Obtain the correct number of CPUs for virtualized or containerized environments.

  Close 2519

* Change ``unbalanced-tuple-unpacking`` back to a warning.

  It used to be a warning until a couple of years ago, after it was promoted to
  an error. But the check might be suggesting the wrong thing in some cases,
  for instance when checking against ``sys.argv`` which cannot be known at static
  analysis time. Given it might rely on potential unknown data, it's best to
  have it as a warning.

  Close 2522

* Remove ``enumerate`` usage suggestion when defining ``__iter__`` (C0200)

  Close 2477

* Emit ``too-many-starred-assignment`` only when the number of Starred nodes is per assignment elements

  Close 2513

* `try-except-raise` checker now handles multilevel inheritance hirerachy for exceptions correctly.

  Close 2484

* Add a new check, ``simplifiable-if-expression`` for expressions like ``True if cond else False``.

  Close 2487

* ``too-few-public-methods`` is not reported for ``typing.NamedTuple``

  Close 2459

* too-few-public-methods`` is not reported for dataclasses created with options.

  Close 2488

* Remove wrong modules from 'bad-python3-import'.

  Close 2453

* The ``json`` reporter prints an empty list when no messages are emitted

  Close 2446

* Add a new check, ``duplicate-string-formatting-argument``

  This new check is emitted whenever a duplicate string formatting argument
  is found.

  Close 497

* ``assignment-from-no-return`` is not emitted for coroutines.

  Close 1715

* Report format string type mismatches.

* ``consider-using-ternary`` and ``simplified-boolean-expression`` no longer emit for sequence based checks

  Close 2473

* Handle ``AstroidSyntaxError`` when trying to import a module.

  Close 2313

* Allow ``__module__`` to be redefined at a class level. Close 2451

* ``pylint`` used to emit a ``unused-variable`` error if unused import was found in the function. Now instead of
  ``unused-variable``, ``unused-import`` is emitted.

  Close 2421

* Handle asyncio.coroutine when looking for ``not-an-iterable`` check.

  Close 996

* The ``locally-enabled`` check is gone.

  Close 2442

* Infer decorated methods when looking for method-hidden

  Close 2369

* Pick the latest value from the inferred values when looking for ``raising-non-exception``

  Close 2431

* Extend the TYPE_CHECKING guard to TYPE_CHECKING name as well, not just the attribute

  Close 2411

* Ignore import x.y.z as z cases for checker `useless-import-alias`.

  Close 2309

* Fix false positive ``undefined-variable`` and ``used-before-assignment`` with nonlocal keyword usage.

  Close 2049

* Stop ``protected-access`` exception for missing class attributes

* Don't emit `assignment-from-no-return` for decorated function nodes

  Close 2385

* `unnecessary-pass` is now also emitted when a function or class contains only docstring and pass statement.

   In Python, stubbed functions often have a body that contains just a single `pass` statement,
   indicating that the function doesn't do anything. However, a stubbed function can also have just a
   docstring, and function with a docstring and no body also does nothing.

   Close 2208

* ``duplicate-argument-name`` is emitted for more than one duplicate argument per function

   Close 1712

* Allow double indentation levels for more distinguishable indentations

  Close 741

* Consider tuples in exception handler for ``try-except-raise``.
  Close 2389

* Fix astroid.ClassDef check in checkers.utils.is_subclass_of

* Fix wildcard imports being ignored by the import checker

* Fix external/internal distinction being broken in the import graph

* Fix wildcard import check not skipping `__init__.py`

  Close 2430

* Add new option to logging checker, ``logging_format_style``

* Fix --ignore-imports to understand multi-line imports

  Close 1422
  Close 2019

* Add a new check 'implicit-str-concat-in-sequence' to spot string concatenation inside lists, sets & tuples.

* ``literal-comparison`` is now emitted for 0 and 1 literals.

2.1.1

===========================

Release date: 2018-08-07

* fix pylint crash due to ``misplaced-format-function`` not correctly handling class attribute.
  Close 2384

* Do not emit \*-builtin for Python 3 builtin checks when the builtin is used inside a try-except

  Close PyCQA/pylint2228

* ``simplifiable-if-statement`` not emitted when dealing with subscripts

2.1

=========================

Release date: 2018-08-01
* `trailing-comma-tuple` gets emitted for ``yield`` statements as well.

   Close 2363

* Get only the arguments of the scope function for `redefined-argument-from-local`

  Close 2364

* Add a check `misplaced-format-function` which is emitted if format function is used on
  non str object.

  Close 2200

* `chain.from_iterable` no longer emits `dict-{}-not-iterating` when dealing with dict values and keys

* Demote the `try-except-raise` message from an error to a warning (E0705 -> W0706)

   Close 2323

* Correctly handle the new name of the Python implementation of the `abc` module.

  Close PyCQA/astroid2288

 * Modules with `__getattr__` are exempted by default from `no-member`

   There's no easy way to figure out if a module has a particular member when
   the said module uses `__getattr__`, which is a new addition to Python 3.7.
   Instead we assume the safe thing to do, in the same way we do for classes,
   and skip those modules from checking.

   Close 2331

 * Fix a false positive `invalid name` message when method or attribute name is longer then 30 characters.

   Close 2047

 * Include the type of the next branch in `no-else-return`

   Close 2295

 * Fix inconsistent behaviour for bad-continuation on first line of file

   Close 2281

  * Fix not being able to disable certain messages on the last line through
    the global disable option

    Close 2278

 * Don't emit `useless-return` when we have a single statement that is the return itself

   We still want to be explicit when a function is supposed to return
   an optional value; even though `pass` could still work, it's not explicit
   enough and the function might look like it's missing an implementation.
   Close 2300

* Fix false-positive undefined-variable for self referential class name in lamdbas

   Close 704

 * Don't crash when `pylint` is unable to infer the value of an argument to `next()`

   Close 2316

 * Don't emit `not-an-iterable` when dealing with async iterators.

   But do emit it when using the usual iteration protocol against
   async iterators.

   Close 2311

* Can specify a default docstring type for when the check cannot guess the type

   Close 1169

2.0

=========================

Release date: 2018-07-15
 * `try-except-raise` should not be emitted if there are any parent exception class handlers.

    Close 2284

 * `trailing-comma-tuple` can be emitted for `return` statements as well.

    Close 2269

 * Fix a false positive ``inconsistent-return-statements`` message when exception is raised
   inside an else statement.

   Close 1782

 * `ImportFrom` nodes correctly use the full name for the import sorting checks.

   Close 2181

 * [].extend and similar builtin operations don't emit `dict-*-not-iterating` with the Python 3 porting checker

   Close 2187

 * Add a check `consider-using-dict-comprehension` which is emitted if for dict initialization
   the old style with list comprehensions is used.

 * Add a check `consider-using-set-comprehension` which is emitted if for set initialization
   the old style with list comprehensions is used.

 * `logging-not-lazy` is emitted whenever pylint infers that a string is built with addition

   Close 2193

 * Add a check `chained-comparison` which is emitted if a boolean operation can be simplified
   by chaining some of its operations.
   e.g "a < b and b < c", can be simplified as "a < b < c".

   Close 2032

 * Add a check `consider-using-in` for comparisons of a variable against
   multiple values with "==" and "or"s instead of checking if the variable
   is contained "in" a tuple of those values.

 * `in` is considered iterating context for some of the Python 3 porting checkers

   Close 2186

 * Add `--ignore-none` flag to control if pylint should warn about `no-member` where the owner is None

 * Fix a false positive related to `too-many-arguments` and bounded `__get__` methods

   Close 2172

 * `mcs` as the first parameter of metaclass's `__new__` method was replaced by `cls`

   Close 2028

 * `assignment-from-no-return` considers methods as well.

    Close 2081

 * Support typing.TYPE_CHECKING for *unused-import* errors

   Close 1948

 * Inferred classes at a function level no longer emit `invalid-name`
   when they don't respect the variable regular expression

   Close 1049

 * Added basic support for postponed evaluation of function annotations.

   Close 2069

 * Fix a bug with `missing-kwoa` and variadics parameters

   Close 1111

 * `simplifiable-if-statement` takes in account only when assigning to same targets

    Close 1984

 * Make ``len-as-condition`` test more cases, such as ``len() < 1`` or ``len <= 0``

 * Fix false-positive ``line-too-long`` message emission for
   commented line at the end of a module

   Close 1950

 * Fix false-positive ``bad-continuation`` for with statements

   Close 461

 * Don't warn about `stop-iteration-return` when using `next()` over `itertools.count`

   Close 2158

 * Add a check `consider-using-get` for unidiomatic usage of value/default-retrieval
   for a key from a dictionary

   Close 2076

 * invalid-slice-index is not emitted when the slice is used as index for a complex object.

   We only use a handful of known objects (list, set and friends) to figure out if
   we should emit invalid-slice-index when the slice is used to subscript an object.

 * Don't emit `unused-import` anymore for typing imports used in type comments.

 * Add a new check 'useless-import-alias'.

   Close 2052

 * Add `comparison-with-callable` to warn for comparison with bare callable, without calling it.

   Close 2082

 * Don't warn for ``missing-type-doc`` and/or ``missing-return-type-doc``, if type
   annotations exist on the function signature for a parameter and/or return type.
   Close 2083

 * Add `--exit-zero` option for continuous integration scripts to more
   easily call Pylint in environments that abort when a program returns a
   non-zero (error) status code.

   Close 2042

 * Warn if the first argument of an instance/ class method gets assigned

   Close 977

 * New check `comparison-with-itself` to check comparison between same value.

   Close 2051

 * Add a new warning, 'logging-fstring-interpolation', emitted when f-string
   is used within logging function calls.

   Close 1998

 * Don't show 'useless-super-delegation' if the subclass method has different type annotations.

   Close 1923

 * Add `unhashable-dict-key` check.

   Closes 586

 * Don't warn that a global variable is unused if it is defined by an import

   Close 1453

 * Skip wildcard import check for `__init__.py`.

   Close 2026

 * The Python 3 porting mode can now run with Python 3 as well.

 * `too-few-public-methods` is not emitted for dataclasses.

    Close 1793

 * New verbose mode option, enabled with `--verbose` command line flag, to
   display of extra non-checker-related output. It is disabled by default.

   Close 1863

 * `undefined-loop-variable` takes in consideration non-empty iterred objects before emitting

   Close 2039

 * Add support for numpydoc optional return value names.

   Close 2030

 * `singleton-comparison` accounts for negative checks

   Close 2037

 * Add a check `consider-using-in` for comparisons of a variable against
   multiple values with "==" and "or"s instead of checking if the variable
   is contained "in" a tuple of those values.

   Close 1977

 * defaultdict and subclasses of dict are now handled for dict-iter-* checks

   Close 2005

 * `logging-format-interpolation` also emits when f-strings are used instead of % syntax.

   Close 1788

 * Don't trigger misplaced-bare-raise when the raise is in a finally clause

   Close 1924

 * Add a new check, `possibly-unused-variable`.

   This is similar to `unused-variable`, the only difference is that it is
   emitted when we detect a locals() call in the scope of the unused variable.
   The `locals()` call could potentially use the said variable, by consuming
   all values that are present up to the point of the call. This new check
   allows to disable this error when the user intentionally uses `locals()`
   to consume everything.

   Close 1909.

 * `no-else-return` accounts for multiple cases

    The check was a bit overrestrictive because we were checking for
    return nodes in the .orelse node. At that point though the if statement
    can be refactored to not have the orelse. This improves the detection of
    other cases, for instance it now detects TryExcept nodes that are part of
    the .else branch.

    Close 1852

 * Added two new checks, `invalid-envvar-value` and `invalid-envvar-default`.

   The former is trigger whenever pylint detects that environment variable manipulation
   functions uses a different type than strings, while the latter is emitted whenever
   the said functions are using a default variable of different type than expected.

 * Add a check `consider-using-join` for concatenation of strings using str.join(sequence)

   Close 1952

 * Add a check `consider-swap-variables` for swapping variables with tuple unpacking

   Close 1922

 * Add new checker `try-except-raise` that warns the user if an except handler block
   has a ``raise`` statement as its first operator. The warning is shown when there is
   a bare raise statement, effectively re-raising the exception that was caught or the
   type of the exception being raised is the same as the one being handled.

 * Don't crash on invalid strings when checking for `logging-format-interpolation`

   Close 1944

 * Exempt `__doc__` from triggering a `redefined-builtin`

   `__doc__` can be used to specify a docstring for a module without
   passing it as a first-statement string.

 * Fix false positive bad-whitespace from function arguments with default
   values and annotations

   Close 1831

 * Fix stop-iteration-return false positive when next builtin has a
   default value in a generator

   Close 1830

 * Fix emission of false positive ``no-member`` message for class with  "private" attributes whose name is mangled.

   Close 1643

 * Fixed a crash which occurred when `Uninferable` wasn't properly handled in `stop-iteration-return`

   Close 1779

 * Use the proper node to get the name for redefined functions (1792)

   Close 1774

 * Don't crash when encountering bare raises while checking inconsistent returns

   Close 1773

 * Fix a false positive ``inconsistent-return-statements`` message when if statement is inside try/except.

   Close 1770

 * Fix a false positive ``inconsistent-return-statements`` message when while loop are used.

   Close 1772

 * Correct column number for whitespace conventions.

   Previously the column was stuck at 0

   Close 1649

 * Fix ``unused-argument`` false positives with overshadowed variable in
   dictionary comprehension.

   Close 1731

 * Fix false positive ``inconsistent-return-statements`` message when never
   returning functions are used (i.e sys.exit for example).

   Close 1771

 * Fix error when checking if function is exception, as in ``bad-exception-context``.

 * Fix false positive ``inconsistent-return-statements`` message when a
   function is defined under an if statement.

   Close 1794

 * New ``useless-return`` message when function or method ends with a "return" or
   "return None" statement and this is the only return statement in the body.

 * Fix false positive ``inconsistent-return-statements`` message by
   avoiding useless exception inference if the exception is not handled.

   Close 1794 (second part)

 * Fix bad thread instantiation check when target function is provided in args.

   Close 1840

 * Fixed false positive when a numpy Attributes section follows a Parameters
   section

   Close 1867

 * Fix incorrect file path when file absolute path contains multiple ``path_strip_prefix`` strings.

   Close 1120

 * Fix false positive undefined-variable for lambda argument in class definitions

   Close 1824

 * Add of a new checker that warns the user if some messages are enabled or disabled
   by id instead of symbol.

   Close 1599

 * Suppress false-positive ``not-callable`` messages from certain
   staticmethod descriptors

   Close 1699

 * Fix indentation handling with tabs

   Close 1148

 * Fix false-positive ``bad-continuation`` error

   Close 638

 * Fix false positive unused-variable in lambda default arguments

   Close 1921
   Close 1552
   Close 1099
   Close 210

 * Updated the default report format to include paths that can be clicked on in some terminals (e.g. iTerm).

 * Fix inline def behavior with ``too-many-statements`` checker

   Close 1978

 * Fix `KeyError` raised when using docparams and NotImplementedError is documented.

   Close 2102

 * Fix 'method-hidden' raised when assigning to a property or data descriptor.

 * Fix emitting ``useless-super-delegation`` when changing the default value of keyword arguments.

   Close 2022

 * Expand ignored-argument-names include starred arguments and keyword arguments

   Close 2214

 * Fix false-positive undefined-variable in nested lambda

   Close 760

 * Fix false-positive ``bad-whitespace`` message for typing annoatations
   with ellipses in them

   Close 1992

 * Broke down "missing-docstrings" between "module", "class" and "function"

   For this to work we had to make multiple messages with the same old name
   possible.

   Closes 1164

1.9

=========================

Release date: 2018-05-15

 * Added two new Python 3 porting checks, `exception-escape` and `comprehension-escape`

   These two are emitted whenever pylint detects that a variable defined in the
   said blocks is used outside of the given block. On Python 3 these values are deleted.

 * Added a new `deprecated-sys-function`, emitted when accessing removed sys members.

 * Added `xreadlines-attribute`, emitted when the `xreadlines()` attribute is accessed.

 * The Python 3 porting mode can now run with Python 3 as well.

 * docparams extension allows abstract methods to document what overriding
   implementations should return, and to raise NotImplementedError without
   documenting it.

   Closes 2044

 * Special methods do not count towards `too-few-methods`,
   and are considered part of the public API.

 * Enum classes do not trigger `too-few-methods`

   Close 605

 * Added a new Python 2/3 check for accessing `operator.div`, which is removed in Python 3

   Close 1936

 * Added a new Python 2/3 check for accessing removed urllib functions

   Close 1997

1.8.1

===========================

Release date: 2017-12-15

 * Wrong version number in __pkginfo__.

1.8

=========================

Release date: 2017-12-15

 * Respect disable=... in config file when running with --py3k.

 * New warning `shallow-copy-environ` added

   Shallow copy of os.environ doesn't work as people may expect. os.environ
   is not a dict object but rather a proxy object, so any changes made
   on copy may have unexpected effects on os.environ

   Instead of copy.copy(os.environ) method os.environ.copy() should be
   used.

   See https://bugs.python.org/issue15373 for details.

   Close 1301

 * Do not display no-absolute-import warning multiple times per file.

 * `trailing-comma-tuple` refactor check now extends to assignment with
    more than one element (such as lists)

   Close 1713

 * Fixing u'' string in superfluous-parens message

   Close 1420

 * `abstract-class-instantiated` is now emitted for all inference paths.

    Close 1673

 * Add set of predefined naming style to ease configuration of checking
   naming conventions.

   Closes 1013

 * Added a new check, ``keyword-arg-before-vararg``

   This is emitted for function definitions
   in which keyword arguments are placed before variable
   positional arguments (\*args).

   This may lead to args list getting modified if keyword argument's value
   is not provided in the function call assuming it will take default value
   provided in the definition.

 * The `invalid-name` check contains the name of the template that caused the failure

   Close 1176

 * Using the -j flag won't start more child linters than needed.

   Contributed by Roman Ivanov in 1614

 * Fix a false positive with bad-python3-import on relative imports

   Close 1608

 * Added a new Python 3 check, ``non-ascii-bytes-literals``

   Close 1545

 * Added a couple of new Python 3 checks for accessing dict methods in non-iterable context

 * Protocol checks (not-a-mapping, not-an-iterable and co.) aren't emitted on classes with dynamic getattr

 * Added a new warning, 'bad-thread-instantiation'

   This message is emitted when the threading.Thread class does not
   receive the target argument, but receives just one argument, which
   is by default the group parameter.

   Close 1327

 * In non-quiet mode, absolute path of used config file is logged to
   standard error.
   Close 1519

 * Raise meaningful exception for invalid reporter class being selected

   When unknown reporter class will be selected as Pylint reporter,
   meaningful error message would be raised instead of bare ``ImportError``
   or ``AttribueError`` related to module or reporter class being not found.
   Close 1388

 * Added a new Python 3 check for accessing removed functions from itertools
   like ``izip`` or ``ifilterfalse``

 * Added a new Python 3 check for accessing removed fields from the types
   module like ``UnicodeType`` or ``XRangeType``

 * Added a new Python 3 check for declaring a method ``next`` that would have
   been treated as an iterator in Python 2 but a normal function in Python 3.

 * Added a new key-value pair in json output. The key is ``message-id``
   and the value is the message id.
   Close 1512

 * Added a new Python 3.0 check for raising a StopIteration inside a generator.
   The check about raising a StopIteration inside a generator is also valid if the exception
   raised inherit from StopIteration.
   Close 1385

 * Added a new warning, ``raising-format-tuple``, to detect multi-argument
   exception construction instead of message string formatting.

 * Added a new check for method of logging module that concatenate string via + operator
   Close 1479

 * Added parameter for limiting number of suggestions in spellchecking checkers

 * Fix a corner-case in ``consider-using-ternary`` checker.

   When object ``A`` used in  ``X and A or B`` was falsy in boolean context,
   Pylint incorrectly emitted non-equivalent ternary-based suggestion.
   After a change message is correctly not emitted for this case.
   Close 1559

 * Added ``suggestion-mode`` configuration flag. When flag is enabled, informational
   message is emitted instead of cryptic error message for attributes accessed on
   c-extensions.
   Close 1466

 * Fix a false positive ``useless-super-delegation`` message when
   parameters default values are different from those used in the base class.
   Close 1085

 * Disabling 'wrong-import-order', 'wrong-import-position', or
   'ungrouped-imports' for a single line now prevents that line from
   triggering violations on subsequent lines.

   Close 1336

 * Added a new Python check for inconsistent return statements inside method or function.
   Close 1267

 * Fix ``superfluous-parens`` false positive related to handling logical statements
   involving ``in`` operator.

   Close 574

 * ``function-redefined`` message is no longer emitted for functions and
   methods which names matches dummy variable name regular expression.
   Close 1369

 * Fix ``missing-param-doc`` and ``missing-type-doc`` false positives when
   mixing ``Args`` and ``Keyword Args`` in Google docstring.
   Close 1409

  * Fix ``missing-docstring`` false negatives when modules, classes, or methods
    consist of compound statements that exceed the ``docstring-min-length``

 * Fix ``useless-else-on-loop`` false positives when break statements are
   deeply nested inside loop.
   Close 1661

 * Fix no ``wrong-import-order`` message emitted on ordering of first and third party
   libraries. With this fix, pylint distinguishes third and first party
   modules when checking import order.
   Close 1702

 * Fix ``pylint disable=fixme`` directives ignored for comments following the
   last statement in a file.
   Close 1681

 * Fix ``line-too-long`` message deactivated by wrong disable directive.
   The directive ``disable=fixme`` doesn't deactivate anymore the emission
   of ``line-too-long`` message for long commented lines.
   Close 1741

 * If the rcfile specified on the command line doesn't exist, then an
   IOError exception is raised.
   Close 1747

 * Fix the wrong scope of the ``disable=`` directive after a commented line.
   For example when a ``disable=line-too-long`` directive is at the end of
   a long commented line, it no longer disables the emission of ``line-too-long``
   message for lines that follow.
   Close 1742

Links

• PyPI: https://pypi.org/project/pylint
• Changelog: https://pyup.io/changelogs/pylint/
• Repo: https://github.com/PyCQA/pylint