v2.13.8

• Fix a false positive for undefined-loop-variable for a variable used in a lambda
  inside the first of multiple loops.

  Closes #6419

• Fix a crash when linting a file that passes an integer mode= to open

  Closes #6414

• Avoid reporting superfluous-parens on expressions using the is not operator.

  Closes #5930

• Fix a false positive for undefined-loop-variable when the else of a for
  loop raises or returns.

  Closes #5971

• Fix false positive for unused-variable for classes inside functions
  and where a metaclass is provided via a call.

  Closes #4020

• Fix false positive for unsubscriptable-object in Python 3.8 and below for
  statements guarded by if TYPE_CHECKING.

  Closes #3979

v2.13.7

• Fix a crash caused by using the new config from 2.14.0 in 2.13.x code.

  Closes #6408

v2.13.6

• Fix a crash in the unsupported-membership-test checker when assigning
  multiple constants to class attributes including __iter__ via unpacking.

  Closes #6366

• Asterisks are no longer required in Sphinx and Google style parameter documentation
  for missing-param-doc and are parsed correctly.

  Closes #5815
  Closes #5406

• Fixed a false positive for unused-variable when a builtin specified in
  --additional-builtins is given a type annotation.

  Closes #6388

• Fixed an AstroidError in 2.13.0 raised by the duplicate-code checker with
  ignore-imports or ignore-signatures enabled.

  Closes #6301

v2.13.5

• Fix false positive regression in 2.13.0 for used-before-assignment for
  homonyms between variable assignments in try/except blocks and variables in
  subscripts in comprehensions.

  Closes #6069
  Closes #6136

• lru-cache-decorating-method has been renamed to cache-max-size-none and
  will only be emitted when maxsize is None.

  Closes #6180

• Fix false positive for unused-import when disabling both used-before-assignment and undefined-variable.

  Closes #6089

• Narrow the scope of the unnecessary-ellipsis checker to:

  • functions & classes which contain both a docstring and an ellipsis.
  • A body which contains an ellipsis nodes.Expr node & at least one other statement.

• Fix false positive for used-before-assignment for assignments taking place via
  nonlocal declarations after an earlier type annotation.

  Closes #5394

• Fix crash for redefined-slots-in-subclass when the type of the slot is not a const or a string.

  Closes #6100

• Only raise not-callable when all the inferred values of a property are not callable.

  Closes #5931

• Fix a false negative for subclassed-final-class when a set of other messages were disabled.

v2.13.4

• Fix false positive regression in 2.13.0 for used-before-assignment for
  homonyms between variable assignments in try/except blocks and variables in
  a comprehension's filter.

  Closes #6035

• Include testing_pylintrc in source and wheel distributions.

  Closes #6028

• Fix crash in super-init-not-called checker when using ctypes.Union.

  Closes #6027

• Fix crash for unneccessary-ellipsis checker when an ellipsis is used inside of a container or a lambda expression.

  Closes #6036
  Closes #6037
  Closes #6048

v2.13.3

• Fix false positive for unnecessary-ellipsis when using an ellipsis as a default argument.

  Closes #5973

• Fix crash involving unbalanced tuple unpacking.

  Closes #5998

• Fix false positive for 'nonexistent-operator' when repeated '-' are
  separated (e.g. by parens).

  Closes #5769

v2.13.2

• Fix crash when subclassing a namedtuple.

  Closes #5982

• Fix false positive for superfluous-parens for patterns like
  "return (a or b) in iterable".

  Closes #5803

• Fix a false negative regression in 2.13.0 where protected-access was not
  raised on functions.

  Fixes #5989

• Better error messages in case of crash if pylint can't write the issue template.

  Refer to #5987

v2.13.1

• Fix a regression in 2.13.0 where used-before-assignment was emitted for
  the usage of a nonlocal in a try block.

  Fixes #5965

• Avoid emitting raising-bad-type when there is inference ambiguity on
  the variable being raised.

  Closes #2793

• Loosen TypeVar default name pattern a bit to allow names with multiple uppercase
  characters. E.g. HVACModeT or IPAddressT.

  Closes #5981

• Fixed false positive for unused-argument when a nonlocal name is used
  in a nested function that is returned without being called by its parent.

  Closes #5187

• Fix program crash for modified_iterating-list/set/dict when the list/dict/set
  being iterated through is a function call.

  Closes #5969

• Don't emit broken-noreturn and broken-collections-callable errors
  inside if TYPE_CHECKING blocks.

2.13.0

• Add missing dunder methods to unexpected-special-method-signature check.

• No longer emit no-member in for loops that reference self if the binary operation that
  started the for loop uses a self that is encapsulated in tuples or lists.

  Ref pylint-dev/astroid#1360
  Closes #4826

• Output better error message if unsupported file formats are used with pyreverse.

  Closes #5950

• Fix pyreverse diagrams type hinting for classmethods and staticmethods.

• Fix pyreverse diagrams type hinting for methods returning None.

• Fix matching --notes options that end in a non-word character.

  Closes #5840

• Updated the position of messages for class and function defintions to no longer cover
  the complete definition. Only the def or class + the name of the class/function
  are covered.

  Closes #5466

• using-f-string-in-unsupported-version and using-final-decorator-in-unsupported-version msgids
  were renamed from W1601 and W1602 to W2601 and W2602. Disabling using these msgids will break.
  This is done in order to restore consistency with the already existing msgids for apply-builtin and
  basestring-builtin from the now deleted python 3K+ checker. There is now a check that we're not using
  existing msgids or symbols from deleted checkers.

  Closes #5729

• The line numbering for messages related to function arguments is now more accurate. This can
  require some message disables to be relocated to updated positions.

• Add --recursive option to allow recursive discovery of all modules and packages in subtree. Running pylint with
  --recursive=y option will check all discovered .py files and packages found inside subtree of directory provided
  as parameter to pylint.

  Closes #352

• Add modified-iterating-list, modified-iterating-dict and modified-iterating-set,
  emitted when items are added to or removed from respectively a list, dictionary or
  set being iterated through.

  Closes #5348

• Fix false-negative for assignment-from-none checker using list.sort() method.

  closes #5722

• New extension import-private-name: indicate imports of external private packages
  and objects (prefixed with _). It can be loaded using load-plugins=pylint.extensions.private_import.

  Closes #5463

• Fixed crash from arguments-differ and arguments-renamed when methods were
  defined outside the top level of a class.

  Closes #5648

• Removed the deprecated check_docs extension. You can use the docparams checker
  to get the checks previously included in check_docs.

  Closes #5322

• Added a testutil extra require to the packaging, as gitpython should not be a dependency
  all the time but is still required to use the primer helper code in pylint.testutil. You can
  install it with pip install pylint[testutil].

  Closes #5486

• Reinstated checks from the python3 checker that are still useful for python 3
  (eq-without-hash). This is now in the pylint.extensions.eq_without_hash optional
  extension.

  Closes #5025

• Fixed an issue where ungrouped-imports could not be disabled without raising
  useless-suppression.

  Ref #2366

• Added several checkers to deal with unicode security issues
  (see Trojan Sources <https://trojansource.codes/>_ and
  PEP 672 <https://www.python.org/dev/peps/pep-0672/>_ for details) that also
  concern the readability of the code. In detail the following checks were added:

  • bad-file-encoding checks that the file is encoded in UTF-8 as suggested by
    PEP8 <https://www.python.org/dev/peps/pep-0008/#id20>.
    UTF-16 and UTF-32 are not supported by Python <https://bugs.python.org/issue1503789>
    at the moment. If this ever changes
    invalid-unicode-codec checks that they aren't used, to allow for backwards
    compatibility.

  • bidirectional-unicode checks for bidirectional unicode characters that
    could make code execution different than what the user expects.

  • invalid-character-backspace, invalid-character-carriage-return,
    invalid-character-sub, invalid-character-esc,
    invalid-character-zero-width-space and invalid-character-nul
    to check for possibly harmful unescaped characters.

  Closes #5281

• Use the tomli package instead of toml to parse .toml files.

Closes #5885

• Fix false positive - Allow unpacking of self in a subclass of typing.NamedTuple.

Closes #5312

• Fixed false negative unpacking-non-sequence when value is an empty list.

Closes #5707

• Better warning messages for useless else or elif when a function returns early.

  Closes #5614

• Fixed false positive consider-using-dict-comprehension when creating a dict
  using a list of tuples where key AND value vary depending on the same condition.

  Closes #5588

• Fixed false positive for global-variable-undefined when global is used with a class name

  Closes #3088

• Fixed false positive for unused-variable when a nonlocal name is assigned as part of a multi-name assignment.

  Closes #3781

• Fixed a crash in unspecified-encoding checker when providing None
  to the mode argument of an open() call.

  Closes #5731

• Fixed a crash involving a NewType named with an f-string.

  Closes #5770
  Ref pylint-dev/astroid#1400

• Improved bad-open-mode message when providing None to the mode
  argument of an open() call.

  Closes #5733

• Added lru-cache-decorating-method checker with checks for the use of functools.lru_cache
  on class methods. This is unrecommended as it creates memory leaks by never letting the instance
  getting garbage collected.

  Closes #5670

• Fixed crash with recursion error for inference of class attributes that referenced
  the class itself.

  Closes #5408
  Ref pylint-dev/astroid#1392

• Fixed false positive for unused-argument when a method overridden in a subclass
  does nothing with the value of a keyword-only argument.

  Closes #5771
  Ref pylint-dev/astroid#1382

• The issue template for crashes is now created for crashes which were previously not covered
  by this mechanism.

  Closes #5668

• Rewrote checker for non-ascii-name.
  It now ensures all Python names are ASCII and also properly
  checks the names of imports (non-ascii-module-import) as
  well as file names (non-ascii-file-name) and emits their respective new warnings.

  Non ASCII characters could be homoglyphs (look alike characters) and hard to
  enter on a non specialized keyboard.
  See Confusable Characters in PEP 672 <https://www.python.org/dev/peps/pep-0672/#confusable-characters-in-identifiers>_

• When run in parallel mode pylint now pickles the data passed to subprocesses with
  the dill package. The dill package has therefore been added as a dependency.

• An astroid issue where symlinks were not being taken into account
  was fixed

  Closes #1470
  Closes #3499
  Closes #4302
  Closes #4798
  Closes #5081

• Fix a crash in unused-private-member checker when analyzing code using
  type(self) in bound methods.

  Closes #5569

• Optimize parsing of long lines when missing-final-newline is enabled.

  Closes #5724

• Fix false positives for used-before-assignment from using named
  expressions in a ternary operator test and using that expression as
  a call argument.

  Closes #5177, #5212

• Fix false positive for undefined-variable when namedtuple class
  attributes are used as return annotations.

  Closes #5568

• Fix false negative for undefined-variable and related variable messages
  when the same undefined variable is used as a type annotation and is
  accessed multiple times, or is used as a default argument to a function.

  Closes #5399

• Pyreverse - add output in mermaidjs format

• Emit used-before-assignment instead of undefined-variable when attempting
  to access unused type annotations.

  Closes #5713

• Added confidence level CONTROL_FLOW for warnings relying on assumptions
  about control flow.

• used-before-assignment now considers that assignments in a try block
  may not have occurred when the except or finally blocks are executed.

  Closes #85, #2615

• Fixed false negative for used-before-assignment when a conditional
  or context manager intervened before the try statement that suggested
  it might fail.

  Closes #4045

• Fixed false negative for used-before-assignment in finally blocks
  if an except handler did not define the assignment that might have failed
  in the try block.

• Fixed extremely long processing of long lines with comma's.

  Closes #5483

• Fixed crash on properties and inherited class methods when comparing them for
  equality against an empty dict.

  Closes #5646

• Fixed a false positive for assigning-non-slot when the slotted class
  defined __setattr__.

  Closes #3793

• Fixed a false positive for invalid-class-object when the object
  being assigned to the __class__ attribute is uninferable.

• Fixed false positive for used-before-assignment with self-referential type
  annotation in conditional statements within class methods.

  Closes #5499

• Add checker redefined-slots-in-subclass: Emitted when a slot is redefined in a subclass.

  Closes #5617

• Fixed false positive for global-variable-not-assigned when the del statement is used

  Closes #5333

• By default, pylint does no longer take files starting with .# into account. Those are
  considered emacs file locks. See
  https://www.gnu.org/software/emacs/manual/html_node/elisp/File-Lock...

v2.12.2

• Fixed a false positive for unused-import where everything was not analyzed properly inside typing guards.

• Fixed a false-positive regression for used-before-assignment for
  typed variables in the body of class methods that reference the same class

  Closes #5342

• Specified that the ignore-paths option considers "" to represent a
  windows directory delimiter instead of a regular expression escape
  character.

• Fixed a crash with the ignore-paths option when invoking the option
  via the command line.

  Closes #5437

• Fixed handling of Sphinx-style parameter docstrings with asterisks. These
  should be escaped with by prepending a "".

  Closes #5406

• Add endLine and endColumn keys to output of JSONReporter.

  Closes #5380

• Fixed handling of Google-style parameter specifications where descriptions
  are on the line following the parameter name. These were generating
  false positives for missing-param-doc.

  Closes #5452

• Fix false negative for consider-iterating-dictionary during membership checks encapsulated in iterables
  or not in checks

  Closes #5323

• unused-import now check all ancestors for typing guards

  Closes #5316