X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/4abc0399b527c50369c448e00d6e204af74026e5..69ca0a4c7a365c5f5eea519a90980bab72cab764:/docs/the_black_code_style/future_style.md?ds=sidebyside diff --git a/docs/the_black_code_style/future_style.md b/docs/the_black_code_style/future_style.md index 17b7eef..6d289d4 100644 --- a/docs/the_black_code_style/future_style.md +++ b/docs/the_black_code_style/future_style.md @@ -19,7 +19,7 @@ with make_context_manager1() as cm1, make_context_manager2() as cm2, make_contex ... # nothing to split on - line too long ``` -So _Black_ will eventually format it like this: +So _Black_ will, when we implement this, format it like this: ```py3 with \ @@ -31,8 +31,8 @@ with \ ... # backslashes and an ugly stranded colon ``` -Although when the target version is Python 3.9 or higher, _Black_ will use parentheses -instead since they're allowed in Python 3.9 and higher. +Although when the target version is Python 3.9 or higher, _Black_ uses parentheses +instead in `--preview` mode (see below) since they're allowed in Python 3.9 and higher. An alternative to consider if the backslashes in the above formatting are undesirable is to use {external:py:obj}`contextlib.ExitStack` to combine context managers in the @@ -62,93 +62,3 @@ plain strings. User-made splits are respected when they do not exceed the line l limit. Line continuation backslashes are converted into parenthesized strings. Unnecessary parentheses are stripped. The stability and status of this feature is tracked in [this issue](https://github.com/psf/black/issues/2188). - -### Improved empty line management - -1. _Black_ will remove newlines in the beginning of new code blocks, i.e. when the - indentation level is increased. For example: - - ```python - def my_func(): - - print("The line above me will be deleted!") - ``` - - will be changed to: - - ```python - def my_func(): - print("The line above me will be deleted!") - ``` - - This new feature will be applied to **all code blocks**: `def`, `class`, `if`, - `for`, `while`, `with`, `case` and `match`. - -2. _Black_ will enforce empty lines before classes and functions with leading comments. - For example: - - ```python - some_var = 1 - # Leading sticky comment - def my_func(): - ... - ``` - - will be changed to: - - ```python - some_var = 1 - - - # Leading sticky comment - def my_func(): - ... - ``` - -### Improved parentheses management - -_Black_ will format parentheses around return annotations similarly to other sets of -parentheses. For example: - -```python -def foo() -> (int): - ... - -def foo() -> looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong: - ... -``` - -will be changed to: - -```python -def foo() -> int: - ... - - -def foo() -> ( - looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong -): - ... -``` - -And, extra parentheses in `await` expressions and `with` statements are removed. For -example: - -```python -with ((open("bla.txt")) as f, open("x")): - ... - -async def main(): - await (asyncio.sleep(1)) -``` - -will be changed to: - -```python -with open("bla.txt") as f, open("x"): - ... - - -async def main(): - await asyncio.sleep(1) -```