-
+
<h2 align="center">The Uncompromising Code Formatter</h2>
<p align="center">
-<a href="https://travis-ci.org/ambv/black"><img alt="Build Status" src="https://travis-ci.org/ambv/black.svg?branch=master"></a>
+<a href="https://travis-ci.org/python/black"><img alt="Build Status" src="https://travis-ci.org/python/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/ambv/black?branch=master"><img alt="Coverage Status" src="https://coveralls.io/repos/github/ambv/black/badge.svg?branch=master"></a>
-<a href="https://github.com/
ambv/black/blob/master/LICENSE"><img alt="License: MIT" src="https://black.readthedocs.io/en/stable/_static/license.svg"></a>
+<a href="https://coveralls.io/github/python/black?branch=master"><img alt="Coverage Status" src="https://coveralls.io/repos/github/python/black/badge.svg?branch=master"></a>
+<a href="https://github.com/
python/black/blob/master/LICENSE"><img alt="License: MIT" src="https://black.readthedocs.io/en/stable/_static/license.svg"></a>
<a href="https://pypi.org/project/black/"><img alt="PyPI" src="https://black.readthedocs.io/en/stable/_static/pypi.svg"></a>
<a href="https://pepy.tech/project/black"><img alt="Downloads" src="https://pepy.tech/badge/black"></a>
-<a href="https://github.com/
ambv/black"><img alt="Code style: black" src="https://img.shields.io/badge/code%20style-black-000000.svg"></a>
+<a href="https://github.com/
python/black"><img alt="Code style: black" src="https://img.shields.io/badge/code%20style-black-000000.svg"></a>
</p>
> “Any color you like.”
possible.
Try it out now using the [Black Playground](https://black.now.sh).
+Watch the [PyCon 2019 talk](https://youtu.be/esZLCuWs_2Y) to learn more.
---
**[blackd](#blackd)** |
**[Version control integration](#version-control-integration)** |
**[Ignoring unmodified files](#ignoring-unmodified-files)** |
+**[Used by](#used-by)** |
**[Testimonials](#testimonials)** |
**[Show your style](#show-your-style)** |
**[Contributing](#contributing-to-black)** |
black [OPTIONS] [SRC]...
Options:
+ -c, --code TEXT Format the code passed in as a string.
-l, --line-length INTEGER How many characters per line to allow.
[default: 88]
- -t, --target-version [pypy35|cpy27|cpy33|cpy34|cpy35|cpy36|cpy37|cpy38]
+ -t, --target-version [py27|py33|py34|py35|py36|py37|py38]
Python versions that should be supported by
Black's output. [default: per-file auto-
detection]
--py36 Allow using Python 3.6-only syntax on all
input files. This will put trailing commas
in function signatures and calls also after
- *args and **kwargs. [default: per-file
+ *args and **kwargs. Deprecated; use
+ --target-version instead. [default: per-file
auto-detection]
--pyi Format all input files like typing stubs
regardless of file extension (useful when
### NOTE: This is a beta product
-*Black* is already successfully used by several projects, small and big.
+*Black* is already [successfully used](#used-by) by many projects, small and big.
It also sports a decent test suite. However, it is still very new.
Things will probably be wonky for a while. This is made explicit by the
"Beta" trove classifier, as well as by the "b" in the version number.
```py3
# in:
-TracebackException.from_exception(exc, limit, lookup_lines, capture_locals)
+ImportantClass.important_method(exc, limit, lookup_lines, capture_locals, extra_argument)
# out:
-TracebackException.from_exception(
- exc, limit, lookup_lines, capture_locals
+ImportantClass.important_method(
+ exc, limit, lookup_lines, capture_locals, extra_argument
)
```
```py3
# in:
-def very_important_function(template: str, *variables, file: os.PathLike, debug: bool = False):
+def very_important_function(template: str, *variables, file: os.PathLike, engine: str, header: bool = True, debug: bool = False):
"""Applies `variables` to the `template` and writes to `file`."""
with open(file, 'w') as f:
...
template: str,
*variables,
file: os.PathLike,
+ engine: str,
+ header: bool = True,
debug: bool = False,
):
"""Applies `variables` to the `template` and writes to `file`."""
max-line-length = 80
...
select = C,E,F,W,B,B950
-ignore = E501
+ignore = E501,W503,E203
```
You'll find *Black*'s own .flake8 config file is configured like this.
Having one kind of quotes everywhere reduces reader distraction.
It will also enable a future version of *Black* to merge consecutive
string literals that ended up on the same line (see
-[#26](https://github.com/ambv/black/issues/26) for details).
+[#26](https://github.com/python/black/issues/26) for details).
Why settle on double quotes? They anticipate apostrophes in English
text. They match the docstring standard described in [PEP 257](https://www.python.org/dev/peps/pep-0257/#what-is-a-docstring).
```toml
[tool.black]
line-length = 88
-py36 = true
+target-version = ['py37']
include = '\.pyi?$'
exclude = '''
### Emacs
-Use [proofit404/blacken](https://github.com/proofit404/blacken).
+Use [proofit404/blacken](https://github.com/proofit404/blacken) or
+[Elpy](https://github.com/jorgenschaefer/elpy).
-### PyCharm
+### PyCharm/IntelliJ IDEA
1. Install `black`.
%LocalAppData%\Programs\Python\Python36-32\Scripts\black.exe # possible location
```
-3. Open External tools in PyCharm with `File -> Settings -> Tools -> External Tools`.
+3. Open External tools in PyCharm/IntelliJ IDEA
+
+ On macOS:
+
+```PyCharm -> Preferences -> Tools -> External Tools```
+
+ On Windows / Linux / BSD:
+
+```File -> Settings -> Tools -> External Tools```
4. Click the + icon to add a new external tool with the following values:
- Name: Black
- Description: Black is the uncompromising Python code formatter.
- Program: <install_location_from_step_2>
- - Arguments: `$FilePath$`
+ - Arguments: `"$FilePath$"`
5. Format the currently opened file by selecting `Tools -> External Tools -> black`.
- - Alternatively, you can set a keyboard shortcut by navigating to `Preferences -> Keymap -> External Tools -> External Tools - Black`.
+ - Alternatively, you can set a keyboard shortcut by navigating to `Preferences or Settings -> Keymap -> External Tools -> External Tools - Black`.
-6. Optionally, run Black on every file save:
+6. Optionally, run *Black* on every file save:
1. Make sure you have the [File Watcher](https://plugins.jetbrains.com/plugin/7177-file-watchers) plugin installed.
- 2. Go to `Preferences -> Tools -> File Watchers` and click `+` to add a new watcher:
+ 2. Go to `Preferences or Settings -> Tools -> File Watchers` and click `+` to add a new watcher:
- Name: Black
- File type: Python
- Scope: Project Files
- Program: <install_location_from_step_2>
- Arguments: `$FilePath$`
- - Output paths to refresh: `$FilePathRelativeToProjectRoot$`
+ - Output paths to refresh: `$FilePath$`
- Working directory: `$ProjectFileDir$`
- Uncheck "Auto-save edited files to trigger the watcher"
+
+
+### Wing IDE
+
+Wing supports black via the OS Commands tool, as explained in the Wing documentation on [pep8 formatting](https://wingware.com/doc/edit/pep8). The detailed procedure is:
+
+1. Install `black`.
+
+```console
+$ pip install black
+```
+
+2. Make sure it runs from the command line, e.g.
+
+```console
+$ black --help
+```
+
+3. In Wing IDE, activate the **OS Commands** panel and define the command **black** to execute black on the currently selected file:
+
+- Use the Tools -> OS Commands menu selection
+- click on **+** in **OS Commands** -> New: Command line..
+ - Title: black
+ - Command Line: black %s
+ - I/O Encoding: Use Default
+ - Key Binding: F1
+ - [x] Raise OS Commands when executed
+ - [x] Auto-save files before execution
+ - [x] Line mode
+
+4. Select a file in the editor and press **F1** , or whatever key binding you selected in step 3, to reformat the file.
+
### Vim
Commands and shortcuts:
To install with [vim-plug](https://github.com/junegunn/vim-plug):
```
-Plug 'ambv/black'
+Plug 'python/black'
```
or with [Vundle](https://github.com/VundleVim/Vundle.vim):
```
-Plugin 'ambv/black'
+Plugin 'python/black'
```
-or you can copy the plugin from [plugin/black.vim](https://github.com/ambv/black/tree/master/plugin/black.vim).
+or you can copy the plugin from [plugin/black.vim](https://github.com/python/black/tree/master/plugin/black.vim).
Let me know if this requires any changes to work with Vim 8's builtin
`packadd`, or Pathogen, and so on.
passed). *Black* will still emit messages on stderr but that shouldn't
affect your use case.
-This can be used for example with PyCharm's [File Watchers](https://www.jetbrains.com/help/pycharm/file-watchers.html).
+This can be used for example with PyCharm's or IntelliJ's [File Watchers](https://www.jetbrains.com/help/pycharm/file-watchers.html).
## blackd
-h, --help Show this message and exit.
```
+There is no official blackd client tool (yet!). You can test that blackd is
+working using `curl`:
+
+```
+blackd --bind-port 9090 & # or let blackd choose a port
+curl -s -XPOST "localhost:9090" -d "print('valid')"
+```
+
### Protocol
`blackd` only accepts `POST` requests at the `/` path. The body of the request
- `X-Python-Variant`: if set to `pyi`, `blackd` will act as *Black* does when
passed the `--pyi` command line flag. Otherwise, its value must correspond to
a Python version or a set of comma-separated Python versions, optionally
- prefixed with `cpy` or `pypy`. For example, to request code that is compatible
- with PyPy 3.5 and CPython 3.5, set the header to `pypy3.5,cpy3.5`.
+ prefixed with `py`. For example, to request code that is compatible
+ with Python 3.5 and 3.6, set the header to `py3.5,py3.6`.
If any of these headers are set to invalid values, `blackd` returns a `HTTP 400`
error response, mentioning the name of the problematic header in the message body.
`.pre-commit-config.yaml` in your repository:
```yaml
repos:
-- repo: https://github.com/ambv/black
+- repo: https://github.com/python/black
rev: stable
hooks:
- id: black
Avoid using `args` in the hook. Instead, store necessary configuration
in `pyproject.toml` so that editors and command-line usage of Black all
-behave consistently for your project. See *Black*'s own `pyproject.toml`
+behave consistently for your project. See *Black*'s own [pyproject.toml](/pyproject.toml)
for an example.
If you're already using Python 3.7, switch the `language_version`
`file-mode` is an int flag that determines whether the file was formatted as 3.6+ only,
as .pyi, and whether string normalization was omitted.
+To override the location of these files on macOS or Linux, set the environment variable
+`XDG_CACHE_HOME` to your preferred location. For example, if you want to put the cache in
+the directory you're running *Black* from, set `XDG_CACHE_HOME=.cache`. *Black* will then
+write the above files to `.cache/black/<version>/`.
+
+## Used by
+
+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.
+
+Are we missing anyone? Let us know.
+
## Testimonials
Use the badge in your project's README.md:
```markdown
-[](https://github.com/ambv/black)
+[](https://github.com/python/black)
```
Using the badge in README.rst:
```
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
- :target: https://github.com/ambv/black
+ :target: https://github.com/python/black
```
-Looks like this: [](https://github.com/ambv/black)
+Looks like this: [](https://github.com/python/black)
## License
## Change Log
-### 19.2b0
+### unreleased
+
+* added `black -c` as a way to format code passed from the command line
+ (#761)
+
+* --safe now works with Python 2 code (#840)
+
+* fixed grammar selection for Python 2-specific code (#765)
+
+* fixed feature detection for trailing commas in function definitions
+ and call sites (#763)
+
+* *Black* can now format async generators (#593)
+
+* *Black* no longer crashes on Windows machines with more than 61 cores
+ (#838)
+
+* *Black* no longer crashes on standalone comments prepended with
+ a backslash (#767)
+
+* *Black* no longer crashes on `from` ... `import` blocks with comments
+ (#829)
+
+* removed unnecessary parentheses around `yield` expressions (#834)
+
+* added parentheses around long tuples in unpacking assignments (#832)
+
+* fixed bug that led *Black* format some code with a line length target
+ of 1 (#762)
-* *Black* no longer normalizes numeric literals to include `_` separators.
+* *Black* no longer introduces quotes in f-string subexpressions on string
+ boundaries (#863)
+
+* if *Black* puts parenthesis around a single expression, it moves comments
+ to the wrapped expression instead of after the brackets (#872)
+
+
+### 19.3b0
* new option `--target-version` to control which Python versions
- *Black*-formatted code should target
+ *Black*-formatted code should target (#618)
+
+* deprecated `--py36` (use `--target-version=py36` instead) (#724)
+
+* *Black* no longer normalizes numeric literals to include `_` separators (#696)
+
+* long `del` statements are now split into multiple lines (#698)
+
+* type comments are no longer mangled in function signatures
+
+* improved performance of formatting deeply nested data structures (#509)
+
+* *Black* now properly formats multiple files in parallel on
+ Windows (#632)
+
+* *Black* now creates cache files atomically which allows it to be used
+ in parallel pipelines (like `xargs -P8`) (#673)
+
+* *Black* now correctly indents comments in files that were previously
+ formatted with tabs (#262)
+
+* `blackd` now supports CORS (#622)
+
### 18.9b0
Multiple contributions by:
* [Anthony Sottile](mailto:asottile@umich.edu)
* [Artem Malyshev](mailto:proofit404@gmail.com)
+* [Benjamin Woodruff](mailto:github@benjam.info)
* [Christian Heimes](mailto:christian@python.org)
* [Daniel M. Capella](mailto:polycitizen@gmail.com)
* [Eli Treuherz](mailto:eli@treuherz.com)
+* hauntsaninja
* Hugo van Kemenade
* [Ivan Katanić](mailto:ivan.katanic@gmail.com)
+* [Jason Fried](mailto:me@jasonfried.info)
* [Jonas Obrist](mailto:ojiidotch@gmail.com)
* [Luka Sterbic](mailto:luka.sterbic@gmail.com)
* [Miguel Gaiowski](mailto:miggaiowski@gmail.com)
* [Peter Bengtsson](mailto:mail@peterbe.com)
* [Stavros Korokithakis](mailto:hi@stavros.io)
* [Sunil Kapil](mailto:snlkapil@gmail.com)
+* [Utsav Shah](mailto:ukshah2@illinois.edu)
* [Vishwas B Sharma](mailto:sharma.vishwas88@gmail.com)
* [Chuck Wooters](mailto:chuck.wooters@microsoft.com)
projects / etc / vim.git / blobdiff