Redundant parentheses around lists

[cypreess]

Operating system: MacOS Mojave
Python version: 3.6.6
Black version: 18.9b0
Does also happen on master: did not test

Black normally removes redundant parentheses (e.g. ((1)) -> 1) but this feature does not work for lists.

([]) -> ([]) (instead of [])
the same for using function notation
(list()) -> list()

[maciej-gol]

Same for strings: (",").join(some_names) does not get formatted to ",".join(some_names).

[wimglenn]

Another example:

foo(arg1=1, arg2=(
    "hello\n"
    "world"
))

bar(arg1=1, arg2=(
    "spam"
))

reformats with some strange choices

foo(arg1=1, arg2=("hello\n" "world"))

bar(arg1=1, arg2=("spam"))

[ichard26]

The suggestions in the original post and also the second post are IMO reasonable to implement. So unless they are technical reasons, I doubt a PR implementing this would be rejected.

wimglenn's case is covered by #1123.

[oyeyipo]

the OP issue seems to be resolved.

[felix-hilden]

At least not in main: playground

[oyeyipo]

At least not in main: playground

They are on v22.1.0

[felix-hilden]

I meant that the original issue isn't fixed in main, nor in 22.1.0.