X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/537ea8df35b1004bdb228b483907fb5dd92e5257..283d999c3f89e2204cbf5a61242665bedd6887ef:/docs/the_black_code_style.md diff --git a/docs/the_black_code_style.md b/docs/the_black_code_style.md index 09d5830..19464ba 100644 --- a/docs/the_black_code_style.md +++ b/docs/the_black_code_style.md @@ -199,12 +199,12 @@ You'd do it like this: max-line-length = 80 ... select = C,E,F,W,B,B950 -ignore = E203, E501, W503 +extend-ignore = E203, E501 ``` You'll find _Black_'s own .flake8 config file is configured like this. Explanation of -why W503 and E203 are disabled can be found further in this documentation. And if you're -curious about the reasoning behind B950, +why E203 is disabled can be found further in this documentation. And 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". @@ -244,16 +244,6 @@ required due to an inner function starting immediately after. _Black_ will add trailing commas to expressions that are split by comma where each element is on its own line. This includes function signatures. -Unnecessary trailing commas are removed if an expression fits in one line. This makes it -1% more likely that your line won't exceed the allotted line length limit. Moreover, in -this scenario, if you added another argument to your call, you'd probably fit it in the -same line anyway. That doesn't make diffs any larger. - -One exception to removing trailing commas is tuple expressions with just one element. In -this case _Black_ won't touch the single trailing comma as this would unexpectedly -change the underlying data type. Note that this is also the case when commas are used -while indexing. This is a tuple in disguise: `numpy_array[3, ]`. - One exception to adding trailing commas is function signatures containing `*`, `*args`, or `**kwargs`. In this case a trailing comma is only safe to use on Python 3.6. _Black_ will detect if your file is already 3.6+ only and use trailing commas in this situation. @@ -262,6 +252,10 @@ in function signatures that have stars in them. In other words, if you'd like a comma in this situation and _Black_ didn't recognize it was safe to do so, put it there manually and _Black_ will keep it. +A pre-existing trailing comma informs _Black_ to always explode contents of the current +bracket pair into one item per line. Read more about this in the +[Pragmatism](#pragmatism) section below. + ### Strings _Black_ prefers double quotes (`"` and `"""`) over single quotes (`'` and `'''`). It @@ -309,10 +303,6 @@ multiple lines. This is so that _Black_ is compliant with the recent changes in [PEP 8](https://www.python.org/dev/peps/pep-0008/#should-a-line-break-before-or-after-a-binary-operator) style guide, which emphasizes that this approach improves readability. -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. - ### Slices PEP 8