minor: remove wrong comment in .flake8 (#788)

[etc/vim.git] / README.md

diff --git a/README.md b/README.md
index a23cb61f359bcf1a8d8924baad676bfd6e578800..540960ea06661105b443cfdce6592357410f3f2a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -71,44 +71,58 @@ black {source_file_or_directory}
 black [OPTIONS] [SRC]...
 
 Options:
 black [OPTIONS] [SRC]...
 
 Options:

-  -l, --line-length INTEGER   Where to wrap around.  [default: 88]
-  --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 auto-detection]
-  --pyi                       Format all input files like typing stubs
-                              regardless of file extension (useful when piping
-                              source on standard input).
+  -l, --line-length INTEGER       How many characters per line to allow.
+                                  [default: 88]
+  -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. Deprecated; use
+                                  --target-version instead. [default: per-file
+                                  auto-detection]
+  --pyi                           Format all input files like typing stubs
+                                  regardless of file extension (useful when
+                                  piping source on standard input).

   -S, --skip-string-normalization
   -S, --skip-string-normalization

-                              Don't normalize string quotes or prefixes.
-  --check                     Don't write the files back, just return the
-                              status.  Return code 0 means nothing would
-                              change.  Return code 1 means some files would be
-                              reformatted.  Return code 123 means there was an
-                              internal error.
-  --diff                      Don't write the files back, just output a diff
-                              for each file on stdout.
-  --fast / --safe             If --fast given, skip temporary sanity checks.
-                              [default: --safe]
-  --include TEXT              A regular expression that matches files and
-                              directories that should be included on
-                              recursive searches. On Windows, use forward
-                              slashes for directories.  [default: \.pyi?$]
-  --exclude TEXT              A regular expression that matches files and
-                              directories that should be excluded on
-                              recursive searches. On Windows, use forward
-                              slashes for directories.  [default:
-                              build/|buck-out/|dist/|_build/|\.git/|\.hg/|
-                              \.mypy_cache/|\.tox/|\.venv/]
-  -q, --quiet                 Don't emit non-error messages to stderr. Errors
-                              are still emitted, silence those with
-                              2>/dev/null.
-  -v, --verbose               Also emit messages to stderr about files
-                              that were not changed or were ignored due to
-                              --exclude=.
-  --version                   Show the version and exit.
-  --config PATH               Read configuration from PATH.
-  --help                      Show this message and exit.
+                                  Don't normalize string quotes or prefixes.
+  --check                         Don't write the files back, just return the
+                                  status.  Return code 0 means nothing would
+                                  change.  Return code 1 means some files
+                                  would be reformatted.  Return code 123 means
+                                  there was an internal error.
+  --diff                          Don't write the files back, just output a
+                                  diff for each file on stdout.
+  --fast / --safe                 If --fast given, skip temporary sanity
+                                  checks. [default: --safe]
+  --include TEXT                  A regular expression that matches files and
+                                  directories that should be included on
+                                  recursive searches.  An empty value means
+                                  all files are included regardless of the
+                                  name.  Use forward slashes for directories
+                                  on all platforms (Windows, too).  Exclusions
+                                  are calculated first, inclusions later.
+                                  [default: \.pyi?$]
+  --exclude TEXT                  A regular expression that matches files and
+                                  directories that should be excluded on
+                                  recursive searches.  An empty value means no
+                                  paths are excluded. Use forward slashes for
+                                  directories on all platforms (Windows, too).
+                                  Exclusions are calculated first, inclusions
+                                  later.  [default: /(\.eggs|\.git|\.hg|\.mypy
+                                  _cache|\.nox|\.tox|\.venv|_build|buck-
+                                  out|build|dist)/]
+  -q, --quiet                     Don't emit non-error messages to stderr.
+                                  Errors are still emitted, silence those with
+                                  2>/dev/null.
+  -v, --verbose                   Also emit messages to stderr about files
+                                  that were not changed or were ignored due to
+                                  --exclude=.
+  --version                       Show the version and exit.
+  --config PATH                   Read configuration from PATH.
+  -h, --help                      Show this message and exit.

 ```
 
 *Black* is a well-behaved Unix-style command-line tool:
 ```
 
 *Black* is a well-behaved Unix-style command-line tool:


@@ -141,7 +155,8 @@ original.  This slows it down.  If you're feeling confident, use
 
 *Black* reformats entire files in place.  It is not configurable.  It
 doesn't take previous formatting into account.  It doesn't reformat
 
 *Black* reformats entire files in place.  It is not configurable.  It
 doesn't take previous formatting into account.  It doesn't reformat

-blocks that start with `# fmt: off` and end with `# fmt: on`.  It also
+blocks that start with `# fmt: off` and end with `# fmt: on`. `# fmt: on/off`
+have to be on the same level of indentation. It also

 recognizes [YAPF](https://github.com/google/yapf)'s block comments to
 the same effect, as a courtesy for straddling code.
 
 recognizes [YAPF](https://github.com/google/yapf)'s block comments to
 the same effect, as a courtesy for straddling code.
 


@@ -175,12 +190,12 @@ brackets and put that in a separate indented line.
 ```py3
 # in:
 
 ```py3
 # in:
 

-TracebackException.from_exception(exc, limit, lookup_lines, capture_locals)
+ImportantClass.important_method(exc, limit, lookup_lines, capture_locals, extra_argument)

 
 # out:
 
 
 # out:
 

-TracebackException.from_exception(
-    exc, limit, lookup_lines, capture_locals
+ImportantClass.important_method(
+    exc, limit, lookup_lines, capture_locals, extra_argument

 )
 ```
 
 )
 ```
 


@@ -194,7 +209,7 @@ separate lines.
 ```py3
 # in:
 
 ```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:
         ...
     """Applies `variables` to the `template` and writes to `file`."""
     with open(file, 'w') as f:
         ...


@@ -205,6 +220,8 @@ def very_important_function(
     template: str,
     *variables,
     file: os.PathLike,
     template: str,
     *variables,
     file: os.PathLike,

+    engine: str,
+    header: bool = True,

     debug: bool = False,
 ):
     """Applies `variables` to the `template` and writes to `file`."""
     debug: bool = False,
 ):
     """Applies `variables` to the `template` and writes to `file`."""


@@ -235,13 +252,13 @@ the following configuration.
 multi_line_output=3
 include_trailing_comma=True
 force_grid_wrap=0
 multi_line_output=3
 include_trailing_comma=True
 force_grid_wrap=0

-combine_as_imports=True
+use_parentheses=True

 line_length=88
 ```
 
 The equivalent command line is:
 ```
 line_length=88
 ```
 
 The equivalent command line is:
 ```

-$ isort --multi-line=3 --trailing-comma --force-grid-wrap=0 --combine-as --line-width=88 [ file.py ]
+$ isort --multi-line=3 --trailing-comma --force-grid-wrap=0 --use-parentheses --line-width=88 [ file.py ]

 ```
 </details>
 
 ```
 </details>
 


@@ -277,7 +294,8 @@ ignore = E501
 ```
 
 You'll find *Black*'s own .flake8 config file is configured like this.
 ```
 
 You'll find *Black*'s own .flake8 config file is configured like this.

-If you're curious about the reasoning behind B950, Bugbear's documentation
+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".
 
 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".
 


@@ -355,8 +373,8 @@ string literals that ended up on the same line (see
 [#26](https://github.com/ambv/black/issues/26) for details).
 
 Why settle on double quotes?  They anticipate apostrophes in English
 [#26](https://github.com/ambv/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.  An
-empty string in double quotes (`""`) is impossible to confuse with
+text.  They match the docstring standard described in [PEP 257](https://www.python.org/dev/peps/pep-0257/#what-is-a-docstring).
+An empty string in double quotes (`""`) is impossible to confuse with

 a one double-quote regardless of fonts and syntax highlighting used.
 On top of this, double quotes for strings are consistent with C which
 Python interacts a lot with.
 a one double-quote regardless of fonts and syntax highlighting used.
 On top of this, double quotes for strings are consistent with C which
 Python interacts a lot with.


@@ -377,9 +395,8 @@ an adoption helper, avoid using this for new projects.
 *Black* standardizes most numeric literals to use lowercase letters for the
 syntactic parts and uppercase letters for the digits themselves: `0xAB`
 instead of `0XAB` and `1e10` instead of `1E10`. Python 2 long literals are
 *Black* standardizes most numeric literals to use lowercase letters for the
 syntactic parts and uppercase letters for the digits themselves: `0xAB`
 instead of `0XAB` and `1e10` instead of `1E10`. Python 2 long literals are

-styled as `2L` instead of `2l` to avoid confusion between `l` and `1`. In
-Python 3.6+, *Black* adds underscores to long numeric literals to aid
-readability: `100000000` becomes `100_000_000`.
+styled as `2L` instead of `2l` to avoid confusion between `l` and `1`.
+

 
 ### Line breaks & binary operators
 
 
 ### Line breaks & binary operators
 


@@ -539,6 +556,8 @@ other file.
 If you're running with `--verbose`, you will see a blue message if
 a file was found and used.
 
 If you're running with `--verbose`, you will see a blue message if
 a file was found and used.
 

+Please note `blackd` will not use `pyproject.toml` configuration.
+

 
 ### Configuration format
 
 
 ### Configuration format
 


@@ -558,24 +577,26 @@ to denote a significant space character.
 ```toml
 [tool.black]
 line-length = 88
 ```toml
 [tool.black]
 line-length = 88

-py36 = true
+target-version = ['py37']

 include = '\.pyi?$'
 exclude = '''
 include = '\.pyi?$'
 exclude = '''

-/(
-    \.git
-  | \.hg
-  | \.mypy_cache
-  | \.tox
-  | \.venv
-  | _build
-  | buck-out
-  | build
-  | dist
-
-  # The following are specific to Black, you probably don't want those.
-  | blib2to3
-  | tests/data
-)/
+
+(
+  /(
+      \.eggs         # exclude a few common directories in the
+    | \.git          # root of the project
+    | \.hg
+    | \.mypy_cache
+    | \.tox
+    | \.venv
+    | _build
+    | buck-out
+    | build
+    | dist
+  )/
+  | foo.py           # also separately exclude a file named foo.py in
+                     # the root of the project
+)

 '''
 ```
 
 '''
 ```
 


@@ -599,7 +620,7 @@ configuration from different levels of the file hierarchy.
 Use [proofit404/blacken](https://github.com/proofit404/blacken).
 
 
 Use [proofit404/blacken](https://github.com/proofit404/blacken).
 
 

-### PyCharm
+### PyCharm/IntelliJ IDEA

 
 1. Install `black`.
 
 
 1. Install `black`.
 


@@ -623,28 +644,37 @@ $ where black
 %LocalAppData%\Programs\Python\Python36-32\Scripts\black.exe  # possible location
 ```
 
 %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>
 
 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`.
 
 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:
 
     1. Make sure you have the [File Watcher](https://plugins.jetbrains.com/plugin/7177-file-watchers) plugin installed.
 
 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: `$FilePath$`
         - 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: `$ProjectFileDir$`
         - Working directory: `$ProjectFileDir$`

+       - Uncheck "Auto-save edited files to trigger the watcher"

 
 ### Vim
 
 
 ### Vim
 


@@ -664,7 +694,7 @@ Configuration:
 To install with [vim-plug](https://github.com/junegunn/vim-plug):
 
 ```
 To install with [vim-plug](https://github.com/junegunn/vim-plug):
 
 ```

-Plug 'ambv/black',
+Plug 'ambv/black'

 ```
 
 or with [Vundle](https://github.com/VundleVim/Vundle.vim):
 ```
 
 or with [Vundle](https://github.com/VundleVim/Vundle.vim):


@@ -715,7 +745,7 @@ Use the [Python extension](https://marketplace.visualstudio.com/items?itemName=m
 Use [sublack plugin](https://github.com/jgirardet/sublack).
 
 
 Use [sublack plugin](https://github.com/jgirardet/sublack).
 
 

-### IPython Notebook Magic
+### Jupyter Notebook Magic

 
 Use [blackcellmagic](https://github.com/csurfer/blackcellmagic).
 
 
 Use [blackcellmagic](https://github.com/csurfer/blackcellmagic).
 


@@ -745,7 +775,7 @@ The formatted code will be returned on stdout (unless `--check` was
 passed).  *Black* will still emit messages on stderr but that shouldn't
 affect your use case.
 
 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
 
 
 ## blackd
 


@@ -781,14 +811,14 @@ Options:
 ### Protocol
 
 `blackd` only accepts `POST` requests at the `/` path. The body of the request
 ### Protocol
 
 `blackd` only accepts `POST` requests at the `/` path. The body of the request

-should contain the python source code to be formatted, encoded 
+should contain the python source code to be formatted, encoded

 according to the `charset` field in the `Content-Type` request header. If no
 `charset` is specified, `blackd` assumes `UTF-8`.
 
 There are a few HTTP headers that control how the source is formatted. These
 correspond to command line flags for *Black*. There is one exception to this:
 `X-Protocol-Version` which if present, should have the value `1`, otherwise the
 according to the `charset` field in the `Content-Type` request header. If no
 `charset` is specified, `blackd` assumes `UTF-8`.
 
 There are a few HTTP headers that control how the source is formatted. These
 correspond to command line flags for *Black*. There is one exception to this:
 `X-Protocol-Version` which if present, should have the value `1`, otherwise the

-request is rejected with `HTTP 501` (Not Implemented). 
+request is rejected with `HTTP 501` (Not Implemented).

 
 The headers controlling how code is formatted are:
 
 
 The headers controlling how code is formatted are:
 


@@ -800,8 +830,9 @@ The headers controlling how code is formatted are:
     passed the `--fast` command line flag.
  - `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
     passed the `--fast` command line flag.
  - `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. If this value represents at least Python 3.6, `blackd` will
-    act as *Black* does when passed the `--py36` command line flag.
+    a Python version or a set of comma-separated Python versions, optionally
+    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.
 
 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.


@@ -920,24 +951,65 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 
 ## Change Log
 
 
 ## Change Log
 

+### 19.3b1
+
+* fix bug that led *Black* format some code with a line length target of 1
+  (#762)
+
+### 19.3b0
+
+* new option `--target-version` to control which Python versions
+  *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
 
 * numeric literals are now formatted by *Black* (#452, #461, #464, #469):
 
   * numeric literals are normalized to include `_` separators on Python 3.6+ code
 
 ### 18.9b0
 
 * numeric literals are now formatted by *Black* (#452, #461, #464, #469):
 
   * numeric literals are normalized to include `_` separators on Python 3.6+ code
 

+  * added `--skip-numeric-underscore-normalization` to disable the above behavior and
+    leave numeric underscores as they were in the input
+

   * code with `_` in numeric literals is recognized as Python 3.6+
 
   * code with `_` in numeric literals is recognized as Python 3.6+
 

-  * most letters in numeric literals are lowercased (e.g., in `1e10` or `0xab`)
+  * most letters in numeric literals are lowercased (e.g., in `1e10`, `0x01`)
+
+  * hexadecimal digits are always uppercased (e.g. `0xBADC0DE`)

 
 * added `blackd`, see [its documentation](#blackd) for more info (#349)
 
 * adjacent string literals are now correctly split into multiple lines (#463)
 
 
 * added `blackd`, see [its documentation](#blackd) for more info (#349)
 
 * adjacent string literals are now correctly split into multiple lines (#463)
 

+* trailing comma is now added to single imports that don't fit on a line (#250)
+

 * cache is now populated when `--check` is successful for a file which speeds up
   consecutive checks of properly formatted unmodified files (#448)
 
 * cache is now populated when `--check` is successful for a file which speeds up
   consecutive checks of properly formatted unmodified files (#448)
 

-* code with `_` in numeric literals is recognized as Python 3.6+ (#461)
+* whitespace at the beginning of the file is now removed (#399)
+
+* fixed mangling [pweave](http://mpastell.com/pweave/) and
+  [Spyder IDE](https://pythonhosted.org/spyder/) special comments (#532)

 
 * fixed unstable formatting when unpacking big tuples (#267)
 
 
 * fixed unstable formatting when unpacking big tuples (#267)
 


@@ -954,7 +1026,6 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
   to be a bad idea (#415)
 
 
   to be a bad idea (#415)
 
 

-

 ### 18.6b4
 
 * hotfix: don't freeze when multiple comments directly precede `# fmt: off` (#371)
 ### 18.6b4
 
 * hotfix: don't freeze when multiple comments directly precede `# fmt: off` (#371)


@@ -1317,15 +1388,18 @@ Multiple contributions by:
 * [Christian Heimes](mailto:christian@python.org)
 * [Daniel M. Capella](mailto:polycitizen@gmail.com)
 * [Eli Treuherz](mailto:eli@treuherz.com)
 * [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)
 * [Jonas Obrist](mailto:ojiidotch@gmail.com)
 * [Luka Sterbic](mailto:luka.sterbic@gmail.com)
 * [Miguel Gaiowski](mailto:miggaiowski@gmail.com)
 * [Miroslav Shubernetskiy](mailto:miroslav@miki725.com)
 * Hugo van Kemenade
 * [Ivan Katanić](mailto:ivan.katanic@gmail.com)
 * [Jonas Obrist](mailto:ojiidotch@gmail.com)
 * [Luka Sterbic](mailto:luka.sterbic@gmail.com)
 * [Miguel Gaiowski](mailto:miggaiowski@gmail.com)
 * [Miroslav Shubernetskiy](mailto:miroslav@miki725.com)

-* [Neraste](neraste.herr10@gmail.com)
+* [Neraste](mailto:neraste.herr10@gmail.com)

 * [Osaetin Daniel](mailto:osaetindaniel@gmail.com)
 * [Peter Bengtsson](mailto:mail@peterbe.com)
 * [Stavros Korokithakis](mailto:hi@stavros.io)
 * [Sunil Kapil](mailto:snlkapil@gmail.com)
 * [Osaetin Daniel](mailto:osaetindaniel@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)
 * [Vishwas B Sharma](mailto:sharma.vishwas88@gmail.com)

+* [Chuck Wooters](mailto:chuck.wooters@microsoft.com)