<h2 align="center">The Uncompromising Code Formatter</h2>
<p align="center">
-<a href="https://travis-ci.org/psf/black"><img alt="Build Status" src="https://travis-ci.org/psf/black.svg?branch=master"></a>
+<a href="https://travis-ci.com/psf/black"><img alt="Build Status" src="https://travis-ci.com/psf/black.svg?branch=master"></a>
<a href="https://black.readthedocs.io/en/stable/?badge=stable"><img alt="Documentation Status" src="https://readthedocs.org/projects/black/badge/?version=stable"></a>
<a href="https://coveralls.io/github/psf/black?branch=master"><img alt="Coverage Status" src="https://coveralls.io/repos/github/psf/black/badge.svg?branch=master"></a>
<a href="https://github.com/psf/black/blob/master/LICENSE"><img alt="License: MIT" src="https://black.readthedocs.io/en/stable/_static/license.svg"></a>
```py3
# in:
-l = [1,
+j = [1,
2,
3,
]
# out:
-l = [1, 2, 3]
+j = [1, 2, 3]
```
If not, *Black* will look at the contents of the first outer matching
```
You'll find *Black*'s own .flake8 config file is configured like this.
-If you're curious about the reasoning behind B950,
+If you're curious about the reasoning behind B950,
[Bugbear's documentation](https://github.com/PyCQA/flake8-bugbear#opinionated-warnings)
explains it. The tl;dr is "it's like highway speed limits, we won't
bother you if you overdo it by a few km/h".
-### Wing IDE
+### Wing IDE
Wing supports black via the OS Commands tool, as explained in the Wing documentation on [pep8 formatting](https://wingware.com/doc/edit/pep8). The detailed procedure is:
- click on **+** in **OS Commands** -> New: Command line..
- Title: black
- Command Line: black %s
- - I/O Encoding: Use Default
+ - I/O Encoding: Use Default
- Key Binding: F1
- [x] Raise OS Commands when executed
- [x] Auto-save files before execution
```
or you can copy the plugin from [plugin/black.vim](https://github.com/psf/black/tree/master/plugin/black.vim).
+
+```
+mkdir -p ~/.vim/pack/python/start/black/plugin
+curl https://raw.githubusercontent.com/psf/black/master/plugin/black.vim -o ~/.vim/pack/python/start/black/plugin/black.vim
+```
+
Let me know if this requires any changes to work with Vim 8's builtin
`packadd`, or Pathogen, and so on.
autocmd BufWritePre *.py execute ':Black'
```
+To run *Black* on a key press (e.g. F9 below), add this:
+
+```
+nnoremap <F9> :Black<CR>
+```
+
**How to get Vim with Python 3.6?**
On Ubuntu 17.10 Vim comes with Python 3.6 by default.
On macOS with Homebrew run: `brew install vim --with-python3`.
- `HTTP 500`: If there was any kind of error while trying to format the input.
The response body contains a textual representation of the error.
+The response headers include a `X-Black-Version` header containing the version
+of *Black*.
+
## Version control integration
Use [pre-commit](https://pre-commit.com/). Once you [have it
The following notable open-source projects trust *Black* with enforcing
a consistent code style: pytest, tox, Pyramid, Django Channels, Hypothesis,
attrs, SQLAlchemy, Poetry, PyPA applications (Warehouse, Pipenv, virtualenv),
-every Datadog Agent Integration.
+pandas, Pillow, every Datadog Agent Integration.
Are we missing anyone? Let us know.
* if *Black* puts parenthesis around a single expression, it moves comments
to the wrapped expression instead of after the brackets (#872)
+* *Black* is now able to format Python code that uses assignment expressions
+ (`:=` as described in PEP-572) (#935)
+
+* *Black* is now able to format Python code that uses positional-only
+ arguments (`/` as described in PEP-570) (#946)
+
+* `blackd` now returns the version of *Black* in the response headers (#1013)
+
### 19.3b0