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+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