Remove grammar pickles from git (#225)

[etc/vim.git] / README.md

diff --git a/README.md b/README.md
index 6c99fd32a7c5053fa084d8ecf906acd55ba29d38..57f3ac2e8669dfae035ba21cb36968ae6152ea11 100644 (file)
--- a/README.md
+++ b/README.md
@@ -78,14 +78,16 @@ Options:
   used).
 
 
   used).
 
 

-### NOTE: This is an early pre-release
+### NOTE: This is a beta product

 
 

-*Black* can already successfully format itself and the standard library.
+*Black* is already successfully used by several 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
 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

-"Alpha" trove classifier, as well as by the "a" in the version number.
+"Beta" trove classifier, as well as by the "b" in the version number.

 What this means for you is that **until the formatter becomes stable,
 What this means for you is that **until the formatter becomes stable,

-you should expect some formatting to change in the future**.
+you should expect some formatting to change in the future**.  That being
+said, no drastic stylistic changes are planned, mostly responses to bug
+reports.

 
 Also, as a temporary safety measure, *Black* will check that the
 reformatted code still produces a valid AST that is equivalent to the
 
 Also, as a temporary safety measure, *Black* will check that the
 reformatted code still produces a valid AST that is equivalent to the


@@ -131,13 +133,13 @@ brackets and put that in a separate indented line.
 ```py3
 # in:
 
 ```py3
 # in:
 

-l = [[n for n in list_bosses()], [n for n in list_employees()]]
+TracebackException.from_exception(exc, limit, lookup_lines, capture_locals)

 
 # out:
 
 
 # out:
 

-l = [
-    [n for n in list_bosses()], [n for n in list_employees()]
-]
+TracebackException.from_exception(
+    exc, limit, lookup_lines, capture_locals
+)

 ```
 
 If that still doesn't fit the bill, it will decompose the internal
 ```
 
 If that still doesn't fit the bill, it will decompose the internal


@@ -176,13 +178,13 @@ between two distinct sections of the code that otherwise share the same
 indentation level (like the arguments list and the docstring in the
 example above).
 
 indentation level (like the arguments list and the docstring in the
 example above).
 

-If a line of "from" imports cannot fit in the allotted length, it's always split
-into one per line.  Imports tend to change often and this minimizes diffs, as well
-as enables readers of code to easily find which commit introduced a particular
-import.  This exception also makes *Black* compatible with
-[isort](https://pypi.org/p/isort/).  Use `multi_line_output=3`,
-`include_trailing_comma=True`, `force_grid_wrap=0`, and `line_length=88` in your
-isort config.
+If a data structure literal (tuple, list, set, dict) or a line of "from"
+imports cannot fit in the allotted length, it's always split into one
+element per line.  This minimizes diffs as well as enables readers of
+code to find which commit introduced a particular entry.  This also
+makes *Black* compatible with [isort](https://pypi.org/p/isort/).  Use
+`multi_line_output=3`, `include_trailing_comma=True`,
+`force_grid_wrap=0`, and `line_length=88` in your isort config.

 
 
 ### Line length
 
 
 ### Line length


@@ -268,6 +270,7 @@ if you'd like a trailing comma in this situation and *Black* didn't
 recognize it was safe to do so, put it there manually and *Black* will
 keep it.
 
 recognize it was safe to do so, put it there manually and *Black* will
 keep it.
 

+

 ### Strings
 
 *Black* prefers double quotes (`"` and `"""`) over single quotes (`'`
 ### Strings
 
 *Black* prefers double quotes (`"` and `"""`) over single quotes (`'`


@@ -297,6 +300,7 @@ a bit easier than double quotes.  The latter requires use of the Shift
 key.  My recommendation here is to keep using whatever is faster to type
 and let *Black* handle the transformation.
 
 key.  My recommendation here is to keep using whatever is faster to type
 and let *Black* handle the transformation.
 

+

 ### Line Breaks & Binary Operators
 
 *Black* will break a line before a binary operator when splitting a block
 ### Line Breaks & Binary Operators
 
 *Black* will break a line before a binary operator when splitting a block


@@ -308,6 +312,7 @@ This behaviour may raise ``W503 line break before binary operator`` warnings in
 style guide enforcement tools like Flake8. Since ``W503`` is not PEP 8 compliant,
 you should tell Flake8 to ignore these warnings.
 
 style guide enforcement tools like Flake8. Since ``W503`` is not PEP 8 compliant,
 you should tell Flake8 to ignore these warnings.
 

+

 ### Slices
 
 PEP 8 [recommends](https://www.python.org/dev/peps/pep-0008/#whitespace-in-expressions-and-statements)
 ### Slices
 
 PEP 8 [recommends](https://www.python.org/dev/peps/pep-0008/#whitespace-in-expressions-and-statements)


@@ -321,6 +326,7 @@ This behaviour may raise ``E203 whitespace before ':'`` warnings in style guide
 enforcement tools like Flake8. Since ``E203`` is not PEP 8 compliant, you should
 tell Flake8 to ignore these warnings.
 
 enforcement tools like Flake8. Since ``E203`` is not PEP 8 compliant, you should
 tell Flake8 to ignore these warnings.
 

+

 ### Parentheses
 
 Some parentheses are optional in the Python grammar.  Any expression can
 ### Parentheses
 
 Some parentheses are optional in the Python grammar.  Any expression can


@@ -340,7 +346,41 @@ interesting cases:
 
 In those cases, parentheses are removed when the entire statement fits
 in one line, or if the inner expression doesn't have any delimiters to
 
 In those cases, parentheses are removed when the entire statement fits
 in one line, or if the inner expression doesn't have any delimiters to

-further split on.  Otherwise, the parentheses are always added.
+further split on.  If there is only a single delimiter and the expression
+starts or ends with a bracket, the parenthesis can also be successfully
+omitted since the existing bracket pair will organize the expression
+neatly anyway.  Otherwise, the parentheses are added.
+
+Please note that *Black* does not add or remove any additional nested
+parentheses that you might want to have for clarity or further
+code organization.  For example those parentheses are not going to be
+removed:
+```py3
+return not (this or that)
+decision = (maybe.this() and values > 0) or (maybe.that() and values < 0)
+```
+
+
+### Call chains
+
+Some popular APIs, like ORMs, use call chaining.  This API style is known
+as a [fluent interface](https://en.wikipedia.org/wiki/Fluent_interface).
+*Black* formats those treating dots that follow a call or an indexing
+operation like a very low priority delimiter.  It's easier to show the
+behavior than to explain it.  Look at the example:
+```py3
+def example(session):
+    result = (
+        session.query(models.Customer.id)
+        .filter(
+            models.Customer.account_id == account_id,
+            models.Customer.email == email_address,
+        )
+        .order_by(models.Customer.id.asc())
+        .all()
+    )
+```
+

 
 ### Typing stub files
 
 
 ### Typing stub files
 


@@ -472,14 +512,17 @@ to do this.
 
 Use [joslarson.black-vscode](https://marketplace.visualstudio.com/items?itemName=joslarson.black-vscode).
 
 
 Use [joslarson.black-vscode](https://marketplace.visualstudio.com/items?itemName=joslarson.black-vscode).
 

+

 ### SublimeText 3
 
 Use [sublack plugin](https://github.com/jgirardet/sublack).
 
 ### SublimeText 3
 
 Use [sublack plugin](https://github.com/jgirardet/sublack).
 

+

 ### IPython Notebook Magic
 
 Use [blackcellmagic](https://github.com/csurfer/blackcellmagic).
 
 ### IPython Notebook Magic
 
 Use [blackcellmagic](https://github.com/csurfer/blackcellmagic).
 

+

 ### Other editors
 
 Atom/Nuclide integration is planned by the author, others will
 ### Other editors
 
 Atom/Nuclide integration is planned by the author, others will


@@ -587,7 +630,15 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 
 ## Change Log
 
 
 ## Change Log
 

-### 18.5a0 (unreleased)
+### 18.5b0
+
+* call chains are now formatted according to the
+  [fluent interfaces](https://en.wikipedia.org/wiki/Fluent_interface)
+  style (#67)
+
+* data structure literals (tuples, lists, dictionaries, and sets) are
+  now also always exploded like imports when they don't fit in a single
+  line (#152)

 
 * slices are now formatted according to PEP 8 (#178)
 
 
 * slices are now formatted according to PEP 8 (#178)
 


@@ -597,6 +648,9 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 * math operators now use their respective priorities for delimiting multiline
   expressions (#148)
 
 * math operators now use their respective priorities for delimiting multiline
   expressions (#148)
 

+* optional parentheses are now omitted on expressions that start or end
+  with a bracket and only contain a single operator (#177)
+

 * empty parentheses in a class definition are now removed (#145, #180)
 
 * string prefixes are now standardized to lowercase and `u` is removed
 * empty parentheses in a class definition are now removed (#145, #180)
 
 * string prefixes are now standardized to lowercase and `u` is removed


@@ -606,14 +660,19 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 * typing stub files (`.pyi`) are now formatted in a style that is consistent
   with PEP 484 (#207, #210)
 
 * typing stub files (`.pyi`) are now formatted in a style that is consistent
   with PEP 484 (#207, #210)
 

+* progress when reformatting many files is now reported incrementally
+

 * fixed trailers (content with brackets) being unnecessarily exploded
 * fixed trailers (content with brackets) being unnecessarily exploded

-  into their own lines after a dedented closing bracket
+  into their own lines after a dedented closing bracket (#119)

 
 * fixed an invalid trailing comma sometimes left in imports (#185)
 
 * fixed non-deterministic formatting when multiple pairs of removable parentheses
   were used (#183)
 
 
 * fixed an invalid trailing comma sometimes left in imports (#185)
 
 * fixed non-deterministic formatting when multiple pairs of removable parentheses
   were used (#183)
 

+* fixed multiline strings being unnecessarily wrapped in optional
+  parentheses in long assignments (#215)
+

 * fixed not splitting long from-imports with only a single name
 
 * fixed Python 3.6+ file discovery by also looking at function calls with
 * fixed not splitting long from-imports with only a single name
 
 * fixed Python 3.6+ file discovery by also looking at function calls with


@@ -621,6 +680,11 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
   where used both in function signatures with stars and function calls
   with stars but the former would be reformatted to a single line.
 
   where used both in function signatures with stars and function calls
   with stars but the former would be reformatted to a single line.
 

+* fixed crash on dealing with optional parentheses (#193)
+
+* fixed "is", "is not", "in", and "not in" not considered operators for
+  splitting purposes
+

 * fixed crash when dead symlinks where encountered
 
 
 * fixed crash when dead symlinks where encountered