X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/eb5d175c9cd3c14a0731f8afd0cc5a18264353e7..bfc013ab93d0993a6e24235291dddd4c4ecd64ee:/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 fab4bca..a028a28 100644 --- a/docs/the_black_code_style/future_style.md +++ b/docs/the_black_code_style/future_style.md @@ -23,10 +23,10 @@ So _Black_ will eventually format it like this: ```py3 with \ - make_context_manager(1) as cm1, \ - make_context_manager(2) as cm2, \ - make_context_manager(3) as cm3, \ - make_context_manager(4) as cm4 \ + make_context_manager1() as cm1, \ + make_context_manager2() as cm2, \ + make_context_manager3() as cm3, \ + make_context_manager4() as cm4 \ : ... # backslashes and an ugly stranded colon ``` @@ -34,6 +34,19 @@ with \ 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. +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 +following way: + +```python +with contextlib.ExitStack() as exit_stack: + cm1 = exit_stack.enter_context(make_context_manager1()) + cm2 = exit_stack.enter_context(make_context_manager2()) + cm3 = exit_stack.enter_context(make_context_manager3()) + cm4 = exit_stack.enter_context(make_context_manager4()) + ... +``` + ## Preview style Experimental, potentially disruptive style changes are gathered under the `--preview`