pylint-dev/pylint v2.12.0

2.12.0

on GitHub

Upgrade astroid to 2.9.0

Closes #4982

Add ability to add end_line and end_column to the --msg-template option.
With the standard TextReporter this will add the line and column number of the
end of a node to the output of Pylint. If these numbers are unknown, they are represented
by an empty string.

Introduced primer tests and a configuration tests framework. The helper classes available in
pylint/testutil/ are still unstable and might be modified in the near future.

Closes #4412 #5287

Fix install graphiz message which isn't needed for puml output format.

MessageTest of the unittest testutil now requires the confidence attribute
to match the expected value. If none is provided it is set to UNDEFINED.

add_message of the unittest testutil now actually handles the col_offset parameter
and allows it to be checked against actual output in a test.

Fix a crash in the check_elif extensions where an undetected if in a comprehension
with an if statement within a f-string resulted in an out of range error. The checker no
longer relies on counting if statements anymore and uses known if statements locations instead.
It should not crash on badly parsed if statements anymore.

Fix simplify-boolean-expression when condition can be inferred as False.

Closes #5200

Fix exception when pyreverse parses property function of a class.

The functional testutils now accept end_lineno and end_column. Expected
output files without these will trigger a DeprecationWarning. Expected output files
can be easily updated with the python tests/test_functional.py --update-functional-output command.

The functional testutils now correctly check the distinction betweeen HIGH and
UNDEFINED confidence. Expected output files without defiend confidence levels will now
trigger a DeprecationWarning. Expected output files can be easily updated with the
python tests/test_functional.py --update-functional-output command.

The functional test runner now supports the option min_pyver_end_position to control on which python
versions the end_lineno and end_column attributes should be checked. The default value is 3.8.

Fix accept-no-yields-doc and accept-no-return-doc not allowing missing yield or
return documentation when a docstring is partially correct

Closes #5223

Add an optional extension consider-using-any-or-all : Emitted when a for loop only
produces a boolean and could be replaced by any or all using a generator. Also suggests
a suitable any or all statement.

Closes #5008

Properly identify parameters with no documentation and add new message called missing-any-param-doc

Closes #3799

Add checkers overridden-final-method & subclassed-final-class

Closes #3197

Fixed protected-access for accessing of attributes and methods of inner classes

Closes #3066

Added support for ModuleNotFoundError (import-error and no-name-in-module).
ModuleNotFoundError inherits from ImportError and was added in Python 3.6

undefined-variable now correctly flags variables which only receive a type annotations
and never get assigned a value

Closes #5140

undefined-variable now correctly considers the line numbering and order of classes
used in metaclass declarations

Closes #4031

used-before-assignment now correctly considers references to classes as type annotation
or default values in first-level methods

Closes #3771

undefined-variable and unused-variable now correctly trigger for assignment expressions
in functions defaults

Fixes part of #3688

undefined-variable now correctly triggers for assignment expressions in if ... else statements
This includes a basic form of control flow inference for if ... else statements using
constant boolean values

Closes #3688

Added the --enable-all-extensions command line option. It will load all available extensions
which can be listed by running --list-extensions

Fix bug with importing namespace packages with relative imports

Closes #2967 and #5131

Improve and flatten unused-wildcard-import message

Closes #3859

In length checker, len-as-condition has been renamed as
use-implicit-booleaness-not-len in order to be consistent with
use-implicit-booleaness-not-comparison.

Created new UnsupportedVersionChecker checker class that includes checks for features
not supported by all versions indicated by a py-version.

• Added using-f-string-in-unsupported-version checker. Issued when py-version
  is set to a version that does not support f-strings (< 3.6)

Fix useless-super-delegation false positive when default keyword argument is a variable.

Properly emit duplicate-key when Enum members are duplicate dictionary keys

Closes #5150

Use py-version setting for alternative union syntax check (PEP 604),
instead of the Python interpreter version.

Subclasses of dict are regarded as reversible by the bad-reversed-sequence checker
(Python 3.8 onwards).

Closes #4981

Support configuring mixin class pattern via mixin-class-rgx

Added new checker use-implicit-booleaness-not-comparison: Emitted when
collection literal comparison is being used to check for emptiness.

Closes #4774

mising-param-doc now correctly parses asterisks for variable length and
keyword parameters

Closes #3733

mising-param-doc now correctly handles Numpy parameter documentation without
explicit typing

Closes #5222

pylint no longer crashes when checking assignment expressions within if-statements

Closes #5178

Update ``literal-comparison``` checker to ignore tuple literals

Closes #3031

Normalize the input to the ignore-paths option to allow both Posix and
Windows paths

Closes #5194

Fix double emitting of not-callable on inferrable properties

Closes #4426

self-cls-assignment now also considers tuple assignment

Fix missing-function-docstring not being able to check __init__ and other
magic methods even if the no-docstring-rgx setting was set to do so

Added using-final-decorator-in-unsupported-version checker. Issued when py-version
is set to a version that does not support typing.final (< 3.8)

Added configuration option exclude-too-few-public-methods to allow excluding
classes from the min-public-methods checker.

Closes #3370

The --jobs parameter now fallbacks to 1 if the host operating system does not
have functioning shared semaphore implementation.

Closes #5216

Fix crash for unused-private-member when checking private members on __class__

Closes #5261

Crashes when a list is encountered in a toml configuration do not happen anymore.

Closes #4580

Moved misplaced-comparison-constant to its own extension comparison_placement.
This checker was opinionated and now no longer a default. It can be reactived by adding
pylint.extensions.comparison_placement to load-plugins in your config.

Closes #1064

A new bad-configuration-section checker was added that will emit for misplaced option
in pylint's top level namespace for toml configuration. Top-level dictionaries or option defined
in the wrong section will still silently not be taken into account, which is tracked in a
follow-up issue.

Follow-up in #5259

Fix crash for protected-access on (outer) class traversal

Added new checker useless-with-lock to find incorrect usage of with statement and threading module locks.
Emitted when with threading.Lock(): is used instead of with lock_instance:.

Closes #5208

Make yn validator case insensitive, to allow for True and False in config files.

Fix crash on open() calls when the mode argument is not a simple string.

Partially closes #5321

Inheriting from a class that implements __class_getitem__ no longer raises inherit-non-class.

Pyreverse - Add the project root directory to sys.path

Closes #2479

Don't emit consider-using-f-string if py-version is set to Python < 3.6.
f-strings were added in Python 3.6

Closes #5019

Fix regression for unspecified-encoding with pathlib.Path.read_text()

Closes #5029

Don't emit consider-using-f-string if the variables to be interpolated include a backslash

Fixed false positive for cell-var-from-loop when variable is used as the default
value for a keyword-only parameter.

Closes #5012

Fix false-positive undefined-variable with Lambda, IfExp, and
assignment expression.

Fix false-positive useless-suppression for wrong-import-order

Closes #2366

Fixed toml dependency issue

Closes #5066

Fix false-positive useless-suppression for line-too-long

Closes #4212

Fixed invalid-name not checking parameters of overwritten base object methods

Closes #3614

Fixed crash in consider-using-f-string if format is not called

Closes #5058

Fix crash with AssignAttr in if TYPE_CHECKING blocks.

Closes #5111

Improve node information for invalid-name on function argument.

Prevent return type checkers being called on functions with ellipses as body

Closes #4736

Add is_sys_guard and is_typing_guard helper functions from astroid
to pylint.checkers.utils.

Fix regression on ClassDef inference

Closes #5030
Closes #5036

Fix regression on Compare node inference

Closes #5048

Fix false-positive isinstance-second-argument-not-valid-type with typing.Callable.

Closes #3507
Closes #5087

It is now recommended to do pylint development on Python 3.8 or higher. This
allows using the latest ast parser.

All standard jobs in the pylint CI now run on Python 3.8 by default. We still
support python 3.6 and 3.7 and run tests for those interpreters.

TypingChecker

• Fix false-negative for deprecated-typing-alias and consider-using-alias
  with typing.Type + typing.Callable.