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2.3.1 (2021-03-24)

  • Fix regression in 2.3.0: type annotations no longer redefine imports

2.3.0 (2021-03-14)

  • Recognize tuple concatenation in __all__ export definitions
  • Better support use of annotation-only assignments when using from __future__ import annotations
  • Recognize special-case typing for Annotated
  • Fix undefined name __qualname__ in class scope
  • Recognize special-cased typing for TypeVar
  • Errors for undefined exports in __all__ are shown in a deterministic order
  • Fix false positives in certain typing constructs (TypeVar, NamedTuple, TypedDict, cast)

2.2.0 (2020-04-08)

  • Include column information in error messages
  • Fix @overload detection with other decorators and in non-global scopes
  • Fix return-type annotation being a class member
  • Fix assignment to _ in doctests with existing _ name
  • Namespace attributes which are attached to ast nodes with _pyflakes_ to avoid conflicts with other libraries (notably bandit)
  • Add check for f-strings without placeholders
  • Add check for unused/extra/invalid 'string literal'.format(...)
  • Add check for unused/extra/invalid 'string literal % ...
  • Improve python shebang detection
  • Allow type ignore to be followed by a code # type: ignore[attr-defined]
  • Add support for assignment expressions (PEP 572)
  • Support @overload detection from typing_extensions as well
  • Fix @overload detection for async functions
  • Allow continue inside finally in python 3.8+
  • Fix handling of annotations in positional-only arguments
  • Make pyflakes more resistant to future syntax additions
  • Fix false positives in partially quoted type annotations
  • Warn about is comparison to tuples
  • Fix Checker usage with async function subtrees
  • Add check for if of non-empty tuple
  • Switch from optparse to argparse
  • Fix false positives in partially quoted type annotations in unusual contexts
  • Be more cautious when identifying Literal type expressions

2.1.1 (2019-02-28)

  • Fix reported line number for type comment errors
  • Fix typing.overload check to only check imported names

2.1.0 (2019-01-23)

  • Allow intentional assignment to variables named _
  • Recognize __module__ as a valid name in class scope
  • pyflakes.checker.Checker supports checking of partial ast trees
  • Detect assign-before-use for local variables which shadow builtin names
  • Detect invalid print syntax using >> operator
  • Treat async for the same as a for loop for introducing variables
  • Add detection for list concatenation in __all__
  • Exempt @typing.overload from duplicate function declaration
  • Importing a submodule of an as-aliased import-import is marked as used
  • Report undefined names from __all__ as possibly coming from a * import
  • Add support for changes in Python 3.8-dev
  • Add support for PEP 563 (from __future__ import annotations)
  • Include Python version and platform information in pyflakes --version
  • Recognize __annotations__ as a valid magic global in Python 3.6+
  • Mark names used in PEP 484 # type: ... comments as used
  • Add check for use of is operator with str, bytes, and int literals

2.0.0 (2018-05-20)

  • Drop support for EOL Python <2.7 and 3.2-3.3
  • Check for unused exception binding in except: block
  • Handle string literal type annotations
  • Ignore redefinitions of _, unless originally defined by import
  • Support __class__ without self in Python 3
  • Issue an error for raise NotImplemented(...)

1.6.0 (2017-08-03)

  • Process function scope variable annotations for used names
  • Find Python files without extensions by their shebang

1.5.0 (2017-01-09)

  • Enable support for PEP 526 annotated assignments

1.4.0 (2016-12-30):

  • Change formatting of ImportStarMessage to be consistent with other errors
  • Support PEP 498 "f-strings"

1.3.0 (2016-09-01):

  • Fix PyPy2 Windows IntegrationTests
  • Check for duplicate dictionary keys
  • Fix TestMain tests on Windows
  • Fix "continue" and "break" checks ignoring py3.5's "async for" loop

1.2.3 (2016-05-12):

  • Fix TypeError when processing relative imports

1.2.2 (2016-05-06):

  • Avoid traceback when exception is del-ed in except

1.2.1 (2015-05-05):

  • Fix false RedefinedWhileUnused for submodule imports

1.2.0 (2016-05-03):

  • Warn against reusing exception names after the except: block on Python 3
  • Improve the error messages for imports

1.1.0 (2016-03-01):

  • Allow main() to accept arguments.
  • Support @ matrix-multiplication operator
  • Validate __future__ imports
  • Fix doctest scope testing
  • Warn for tuple assertions which are always true
  • Warn for "import *" not at module level on Python 3
  • Catch many more kinds of SyntaxErrors
  • Check PEP 498 f-strings
  • (and a few more sundry bugfixes)

1.0.0 (2015-09-20):

  • Python 3.5 support. async/await statements in particular.
  • Fix test_api.py on Windows.
  • Eliminate a false UnusedImport warning when the name has been declared "global"

0.9.2 (2015-06-17):

  • Fix a traceback when a global is defined in one scope, and used in another.

0.9.1 (2015-06-09):

  • Update NEWS.txt to include 0.9.0, which had been forgotten.

0.9.0 (2015-05-31):

  • Exit gracefully, not with a traceback, on SIGINT and SIGPIPE.
  • Fix incorrect report of undefined name when using lambda expressions in generator expressions.
  • Don't crash on DOS line endings on Windows and Python 2.6.
  • Don't report an undefined name if the 'del' which caused a name to become undefined is only conditionally executed.
  • Properly handle differences in list comprehension scope in Python 3.
  • Improve handling of edge cases around 'global' defined variables.
  • Report an error for 'return' outside a function.

0.8.1 (2014-03-30):

  • Detect the declared encoding in Python 3.
  • Do not report redefinition of import in a local scope, if the global name is used elsewhere in the module.
  • Catch undefined variable in loop generator when it is also used as loop variable.
  • Report undefined name for (a, b) = (1, 2) but not for the general unpacking (a, b) = func().
  • Correctly detect when an imported module is used in default arguments of a method, when the method and the module use the same name.
  • Distribute a universal wheel file.

0.8.0 (2014-03-22):

  • Adapt for the AST in Python 3.4.
  • Fix caret position on SyntaxError.
  • Fix crash on Python 2.x with some doctest SyntaxError.
  • Add tox.ini.
  • The PYFLAKES_NODOCTEST environment variable has been replaced with the PYFLAKES_DOCTEST environment variable (with the opposite meaning). Doctest checking is now disabled by default; set the environment variable to enable it.
  • Correctly parse incremental __all__ += [...].
  • Catch return with arguments inside a generator (Python <= 3.2).
  • Do not complain about _ in doctests.
  • Drop deprecated methods pushFunctionScope and pushClassScope.

0.7.3 (2013-07-02):

  • Do not report undefined name for generator expression and dict or set comprehension at class level.
  • Deprecate Checker.pushFunctionScope and Checker.pushClassScope: use Checker.pushScope instead.
  • Remove dependency on Unittest2 for the tests.

0.7.2 (2013-04-24):

  • Fix computation of DoctestSyntaxError.lineno and col.
  • Add boolean attribute Checker.withDoctest to ignore doctests.
  • If environment variable PYFLAKES_NODOCTEST is set, skip doctests.
  • Environment variable PYFLAKES_BUILTINS accepts a comma-separated list of additional built-in names.

0.7.1 (2013-04-23):

  • File bin/pyflakes was missing in tarball generated with distribute.
  • Fix reporting errors in non-ASCII filenames (Python 2.x).

0.7.0 (2013-04-17):

  • Add --version and --help options.
  • Support python -m pyflakes (Python 2.7 and Python 3.x).
  • Add attribute Message.col to report column offset.
  • Do not report redefinition of variable for a variable used in a list comprehension in a conditional.
  • Do not report redefinition of variable for generator expressions and set or dict comprehensions.
  • Do not report undefined name when the code is protected with a NameError exception handler.
  • Do not report redefinition of variable when unassigning a module imported for its side-effect.
  • Support special locals like __tracebackhide__ for py.test.
  • Support checking doctests.
  • Fix issue with Turkish locale where 'i'.upper() == 'i' in Python 2.

0.6.1 (2013-01-29):

  • Fix detection of variables in augmented assignments.

0.6.0 (2013-01-29):

  • Support Python 3 up to 3.3, based on the pyflakes3k project.
  • Preserve compatibility with Python 2.5 and all recent versions of Python.
  • Support custom reporters in addition to the default Reporter.
  • Allow function redefinition for modern property construction via property.setter/deleter.
  • Fix spurious redefinition warnings in conditionals.
  • Do not report undefined name in __all__ if import * is used.
  • Add WindowsError as a known built-in name on all platforms.
  • Support specifying additional built-ins in the Checker constructor.
  • Don't issue Unused Variable warning when using locals() in current scope.
  • Handle problems with the encoding of source files.
  • Remove dependency on Twisted for the tests.
  • Support python setup.py test and python setup.py develop.
  • Create script using setuptools entry_points to support all platforms, including Windows.

0.5.0 (2011-09-02):

  • Convert pyflakes to use newer _ast infrastructure rather than compiler.
  • Support for new syntax in 2.7 (including set literals, set comprehensions, and dictionary comprehensions).
  • Make sure class names don't get bound until after class definition.

0.4.0 (2009-11-25):

  • Fix reporting for certain SyntaxErrors which lack line number information.
  • Check for syntax errors more rigorously.
  • Support checking names used with the class decorator syntax in versions of Python which have it.
  • Detect local variables which are bound but never used.
  • Handle permission errors when trying to read source files.
  • Handle problems with the encoding of source files.
  • Support importing dotted names so as not to incorrectly report them as redefined unused names.
  • Support all forms of the with statement.
  • Consider static __all__ definitions and avoid reporting unused names if the names are listed there.
  • Fix incorrect checking of class names with respect to the names of their bases in the class statement.
  • Support the __path__ global in __init__.py.

0.3.0 (2009-01-30):

  • Display more informative SyntaxError messages.
  • Don't hang flymake with unmatched triple quotes (only report a single line of source for a multiline syntax error).
  • Recognize __builtins__ as a defined name.
  • Improve pyflakes support for python versions 2.3-2.5
  • Support for if-else expressions and with statements.
  • Warn instead of error on non-existent file paths.
  • Check for __future__ imports after other statements.
  • Add reporting for some types of import shadowing.
  • Improve reporting of unbound locals