Astor

------------------

Bug fixes
~~~~~~~~~

* Fixed precedence issue for f-string expressions that caused
redundant parenthesis around expression.
(Reported by Ilya Kamenshchikov in `Issue 153`_ and fixed by Batuhan Taskaya in `PR 155`_.)

.. _`Issue 153`: https://github.com/berkerpeksag/astor/issues/153
.. _`PR 155`: https://github.com/berkerpeksag/astor/pull/155

* Fixed :func:`astor.to_source` incorrectly checking whether
*source_generator_class* is a subclass of :class:`astor.code_gen.SourceGenerator`.
(Reported by Yu-Chia "Hank" Liu in `Issue 158`_ and fixed by Will Crichton in `PR 164`_.)

.. _`Issue 158`: https://github.com/berkerpeksag/astor/issues/158
.. _`PR 164`: https://github.com/berkerpeksag/astor/pull/164

* Fixed :exc:`TypeError` when AST nodes with unicode strings are passed to
:func:`astor.to_source`.
(Reported and fixed by Dominik Moritz in `PR 154`_.)

.. _`PR 154`: https://github.com/berkerpeksag/astor/pull/154

* Fixed installation issue with setuptools 41.4.0 or later due to the use of
an undocumented feature.
(Reported and fixed by Jonathan Ringer in `Issue 162`_ and `PR 163`_.)

.. _`Issue 162`: https://github.com/berkerpeksag/astor/issues/162
.. _`PR 163`: https://github.com/berkerpeksag/astor/pull/163

------------------

New features
~~~~~~~~~~~~

* Support ``ast.Constant`` nodes being emitted by Python 3.8 (and initially
created in Python 3.6).
(Reported and fixed by Chris Rink in `Issue 120`_ and `PR 121`_.)

.. _`Issue 120`: https://github.com/berkerpeksag/astor/issues/120
.. _`PR 121`: https://github.com/berkerpeksag/astor/pull/121

* Support Python 3.8's assignment expressions.
(Reported and fixed by Kodi Arfer in `Issue 126`_ and `PR 134`_.)

.. _`Issue 126`: https://github.com/berkerpeksag/astor/issues/126
.. _`PR 134`: https://github.com/berkerpeksag/astor/pull/134

* Support Python 3.8's f-string debugging syntax.
(Reported and fixed by Batuhan Taskaya in `Issue 138`_ and `PR 139`_.)

.. _`Issue 138`: https://github.com/berkerpeksag/astor/issues/138
.. _`PR 139`: https://github.com/berkerpeksag/astor/pull/139

* :func:`astor.to_source` now has a *source_generator_class* parameter to
customize source code generation.
(Reported and fixed by matham in `Issue 113`_ and `PR 114`_.)

.. _`Issue 113`: https://github.com/berkerpeksag/astor/issues/113
.. _`PR 114`: https://github.com/berkerpeksag/astor/pull/114

* The :class:`~SourceGenerator` class can now be imported from the
:mod:`astor` package directly. Previously, the ``astor.code_gen``
submodule was needed to be imported.

* Support Python 3.8's positional only arguments. See :pep:`570` for
more details.
(Reported and fixed by Batuhan Taskaya in `Issue 142`_ and `PR 143`_.)

.. _`Issue 142`: https://github.com/berkerpeksag/astor/issues/142
.. _`PR 143`: https://github.com/berkerpeksag/astor/pull/143

Bug fixes
~~~~~~~~~

* Fix string parsing when there is a newline inside an f-string. (Reported by
Adam Cécile in `Issue 119`_ and fixed by Felix Yan in `PR 123`_.)

* Fixed code generation with escaped braces in f-strings.
(Reported by Felix Yan in `Issue 124`_ and fixed by Kodi Arfer in `PR 125`_.)

.. _`Issue 119`: https://github.com/berkerpeksag/astor/issues/119
.. _`PR 123`: https://github.com/berkerpeksag/astor/pull/123
.. _`Issue 124`: https://github.com/berkerpeksag/astor/issues/124
.. _`PR 125`: https://github.com/berkerpeksag/astor/pull/125

* Fixed code generation with attributes of integer literals, and
with ``u``-prefixed string literals.
(Fixed by Kodi Arfer in `PR 133`_.)

.. _`PR 133`: https://github.com/berkerpeksag/astor/pull/133

* Fixed code generation with very large integers.
(Reported by Adam Kucz in `Issue 127`_ and fixed by Kodi Arfer in `PR 130`_.)

.. _`Issue 127`: https://github.com/berkerpeksag/astor/issues/127
.. _`PR 130`: https://github.com/berkerpeksag/astor/pull/130

* Fixed :class:`astor.tree_walk.TreeWalk` when attempting to access attributes
created by Python's type system (such as ``__dict__`` and ``__weakref__``)
(Reported and fixed by esupoff in `Issue 136`_ and `PR 137`_.)

.. _`Issue 136`: https://github.com/berkerpeksag/astor/issues/136
.. _`PR 137`: https://github.com/berkerpeksag/astor/pull/137

------------------

Bug fixes
~~~~~~~~~

* Fixed installation error by adding the ``setuputils.py`` helper to the sdist.
(Reported by Adam and fixed by Berker Peksag in `Issue 116`_.)

.. _`Issue 116`: https://github.com/berkerpeksag/astor/issues/116

------------------

New features
~~~~~~~~~~~~

* Added initial support for Python 3.7.0.

Note that if you have a subclass of ``astor.code_gen.SourceGenerator``, you
may need to rename the keyword argument ``async`` of the following methods
to ``is_async``:

- ``visit_FunctionDef(..., is_async=False)``
- ``visit_For(..., is_async=False)``
- ``visit_With(..., is_async=False)``

(Reported and fixed by Berker Peksag in `Issue 86`_.)

.. _`Issue 86`: https://github.com/berkerpeksag/astor/issues/86

* Dropped support for Python 2.6 and Python 3.3.

Bug fixes
~~~~~~~~~

* Fixed a bug where newlines would be inserted to a wrong place during
printing f-strings with trailing newlines.
(Reported by Felix Yan and contributed by Radomír Bosák in
`Issue 89`_.)

.. _`Issue 89`: https://github.com/berkerpeksag/astor/issues/89

* Improved code generation to support ``ast.Num`` nodes containing infinities
or NaNs.
(Reported and fixed by Kodi Arfer in `Issue 85`_ and `Issue 100`_.)

.. _`Issue 85`: https://github.com/berkerpeksag/astor/issues/85
.. _`Issue 100`: https://github.com/berkerpeksag/astor/issues/100

* Improved code generation to support empty sets.
(Reported and fixed by Kodi Arfer in `Issue 108`_.)

.. _`Issue 108`: https://github.com/berkerpeksag/astor/issues/108

------------------

Bug fixes
~~~~~~~~~

* Restore backwards compatibility that was broken after 0.6.1.
You can now continue to use the following pattern::

import astor

class SpamCodeGenerator(astor.codegen.SourceGenerator):
...

(Reported by Dan Moldovan and fixed by Berker Peksag in `Issue 87`_.)

.. _`Issue 87`: https://github.com/berkerpeksag/astor/issues/87

------------------

New features
~~~~~~~~~~~~

* Added ``astor.parse_file()`` as an alias to
``astor.code_to_ast.parsefile()``.
(Contributed by Berker Peksag.)

Bug fixes
~~~~~~~~~

* Fix compatibility layer for the ``astor.codegen`` submodule. Importing
``astor.codegen`` now succeeds and raises a :exc:`DeprecationWarning`
instead of :exc:`ImportError`.
(Contributed by Berker Peksag.)