v2.11.0

• The python3 porting mode checker and it's py3k option were removed. You can still find it in older pylint
  versions.

• raising-bad-type is now properly emitted when raising a string

• Added new extension SetMembershipChecker with use-set-for-membership check:
  Emitted when using an in-place defined list or tuple to do a membership test. sets are better optimized for that.

  Closes #4776

• Added py-version config key (if [MASTER] section). Used for version dependant checks.
  Will default to whatever Python version pylint is executed with.

• CodeStyleChecker

  • Added consider-using-assignment-expr: Emitted when an assignment is directly followed by an if statement
    and both can be combined by using an assignment expression :=. Requires Python 3.8

    Closes #4862

• Added consider-using-f-string: Emitted when .format() or '%' is being used to format a string.

  Closes #3592

• Fix false positive for consider-using-with if a context manager is assigned to a
  variable in different paths of control flow (e. g. if-else clause).

  Closes #4751

• https is now prefered in the documentation and http://pylint.pycqa.org correctly redirect to https://pylint.pycqa.org

  Closes #3802

• Fix false positive for function-redefined for simple type annotations

  Closes #4936

• Fix false positive for protected-access if a protected member is used in type hints of function definitions

• Fix false positive dict-iter-missing-items for dictionaries only using tuples as keys

  Closes #3282

• The unspecified-encoding checker now also checks calls to pathlib.Path().read_text()
  and pathlib.Path().write_text()

  Closes #4945

• Fix false positive superfluous-parens for tuples created with inner tuples

  Closes #4907

• Fix false positive unused-private-member for accessing attributes in a class using cls

  Closes #4849

• Fix false positive unused-private-member for private staticmethods accessed in classmethods.

  Closes #4849

• Extended consider-using-in check to work for attribute access.

• Setting min-similarity-lines to 0 now makes the similarty checker stop checking for duplicate code

  Closes #4901

• Fix a bug where pylint complained if the cache's parent directory does not exist

  Closes #4900

• The global-variable-not-assigned checker now catches global variables that are never reassigned in a
  local scope and catches (reassigned) functions

  Closes #1375
  Closes #330

• Fix false positives for invalid-all-format that are lists or tuples at runtime

  Closes #4711

• Fix no-self-use and docparams extension for async functions and methods.

• Add documentation for pyreverse and symilar

  Closes #4616

• Non symbolic messages with the wrong capitalisation now correctly trigger use-symbolic-message-instead

  Closes #5000

• The consider-iterating-dictionary checker now also considers membership checks

  Closes #4069

• The invalid-name message is now more detailed when using multiple naming style regexes.

v2.10.2

• We now use platformdirs instead of appdirs since the latter is not maintained.

  Closes #4886

• Fix a crash in the checker raising shallow-copy-environ when failing to infer
  on copy.copy

  Closes #4891

v2.10.1

• pylint does not crash when PYLINT_HOME does not exist.

  Closes #4883

v2.10.0

• pyreverse: add option to produce colored output.

  Closes #4488

• pyreverse: add output in PlantUML format.

  Closes #4498

• consider-using-with is no longer triggered if a context manager is returned from a function.

  Closes #4748

• pylint does not crash with a traceback anymore when a file is problematic. It
  creates a template text file for opening an issue on the bug tracker instead.
  The linting can go on for other non problematic files instead of being impossible.

• pyreverse: Show class has-a relationships inferred from the type-hint

  Closes #4744

• Fixed a crash when importing beyond the top level package during import-error
  message creation

  Closes #4775

• Added ignored-parents option to the design checker to ignore specific
  classes from the too-many-ancestors check (R0901).

  Partially closes #3057

• Added unspecified-encoding: Emitted when open() is called without specifying an encoding

  Closes #3826

• Improved the Similarity checker performance. Fix issue with --min-similarity-lines used with --jobs.

  Close #4120
  Close #4118

• Don't emit no-member error if guarded behind if statement.

  Ref #1162
  Closes #1990
  Closes #4168

• The default for PYLINTHOME is now the standard XDG_CACHE_HOME, and pylint now uses appdirs.

  Closes #3878

• Added use-list-literal: Emitted when list() is called with no arguments instead of using []

  Closes #4365

• Added use-dict-literal: Emitted when dict() is called with no arguments instead of using {}

  Closes #4365

• Added optional extension consider-ternary-expression: Emitted whenever a variable is assigned in both branches of an if/else block.

  Closes #4366

• Added optional extension while-used: Emitted whenever a while loop is used.

  Closes #4367

• Added forgotten-debug-statement: Emitted when breakpoint, pdb.set_trace or sys.breakpointhook calls are found

  Closes #3692

• Fix false-positive of unused-private-member when using nested functions in a class

  Closes #4673

• Fix crash for unused-private-member that occurred with nested attributes.

  Closes #4755

• Fix a false positive for unused-private-member with class names

  Closes #4681

• Fix false positives for superfluous-parens with walrus operator, ternary operator and inside list comprehension.

  Closes #2818
  Closes #3249
  Closes #3608
  Closes #4346

• Added format-string-without-interpolation checker: Emitted when formatting is applied to a string without any variables to be replaced

  Closes #4042

• Refactor of --list-msgs & --list-msgs-enabled: both options now show whether messages are emittable with the current interpreter.

  Closes #4778

• Fix false negative for used-before-assignment when the variable is assigned
  in an exception handler, but used outside of the handler.

  Closes #626

• Added disable-next option: allows using # pylint: disable-next=msgid to disable a message for the following line

  Closes #1682

• Added redundant-u-string-prefix checker: Emitted when the u prefix is added to a string

  Closes #4102

• Fixed cell-var-from-loop checker: handle cell variables in comprehensions within functions,
  and function default argument expressions. Also handle basic variable shadowing.

  Closes #2846
  Closes #3107

• Fixed bug with cell-var-from-loop checker: it no longer has false negatives when
  both unused-variable and used-before-assignment are disabled.

• Fix false postive for invalid-all-format if the list or tuple builtin functions are used

  Closes #4711

• Config files can now contain environment variables

  Closes #3839

• Fix false-positive used-before-assignment with an assignment expression in a Return node

  Closes #4828

• Added use-sequence-for-iteration: Emitted when iterating over an in-place defined set.

• CodeStyleChecker

  • Limit consider-using-tuple to be emitted only for in-place defined lists.

  • Emit consider-using-tuple even if list contains a starred expression.

• Ignore decorators lines by similarities checker when ignore signatures flag enabled

  Closes #4839

• Allow true and false values in pylintrc for better compatibility with toml config.

• Class methods' signatures are ignored the same way as functions' with similarities "ignore-signatures" option enabled

  Closes #4653

• Improve performance when inferring Call nodes, by utilizing caching.

• Improve error message for invalid-metaclass when the node is an Instance.

v2.9.6

• Fix a false positive undefined-variable when variable name in decoration
  matches function argument

  Closes #3791

v2.9.5

• Fix a crash when there would be a 'TypeError object does not support
  item assignment' in the code we parse.

  Closes #4439

• Fix crash if a callable returning a context manager was assigned to a list or dict item

  Closes #4732

• Fix a crash when a AttributeInferenceError was not handled properly when
  failing to infer the real name of an import in astroid.

  Closes #4692

v2.9.4

• Added time.clock to deprecated functions/methods for python 3.3

• Fix bug in which --fail-on can return a zero exit code even when the specified issue is present

  Closes #4296
  Closes #3363

• Fix hard failure when handling missing attribute in a class with duplicated bases

  Closes #4687

• Fix false-positive consider-using-with (R1732) if a ternary conditional is used together with with

  Closes #4676

• Fix false-positive deprecated-module when relative import uses deprecated module name.

  Closes #4629

• Fix false-positive consider-using-with (R1732) if contextlib.ExitStack takes care of calling the __exit__ method

  Closes #4654

• Fix a false positive for unused-private-member when mutating a private attribute
  with cls

  Closes #4657

• Fix ignored empty functions by similarities checker with "ignore-signatures" option enabled

  Closes #4652

• Fix false-positive of use-maxsplit-arg when index is incremented in
  a loop

  Closes #4664

• Don't emit cyclic-import message if import is guarded by typing.TYPE_CHECKING.

  Closes #3525

• Fix false-positive not-callable with alternative TypedDict syntax

  Closes #4715

• Clarify documentation for consider-using-from-import

• Don't emit unreachable warning for empty generator functions

  Closes #4698

• Don't emit import-error, no-name-in-module, and ungrouped-imports
  for imports guarded by sys.version_info or typing.TYPE_CHECKING.

  Closes #3285
  Closes #3382

• Fix invalid-overridden-method with nested property

  Closes #4368

• Fix false-positive of unused-private-member when using __new__ in a class

  Closes #4668

• No longer emit consider-using-with for ThreadPoolExecutor and ProcessPoolExecutor
  as they have legitimate use cases without a with block.

  Closes #4689

• Fix crash when inferring variables assigned in match patterns

  Closes #4685

• Fix a crash when a StopIteration was raised when inferring
  a faulty function in a context manager.

  Closes #4723

v2.9.3

• Fix a crash that happened when analyzing empty function with docstring
  in the similarity checker.

  Closes #4648

• The similarity checker no longer add three trailing whitespaces for
  empty lines in its report.

v2.9.2

• Fix a crash that happened when analysing code using type(self) to access
  a class attribute in the unused-private-member checker.

  Closes #4638

• Fix a false positive for unused-private-member when accessing a private variable
  with self

  Closes #4644

• Fix false-positive of unnecessary-dict-index-lookup and consider-using-dict-items
  for reassigned dict index lookups

  Closes #4630

v2.9.1

• Upgrade astroid to 2.6.2

  Closes #4631
  Closes #4633