how to comprehension black split []?

[Cherrymelon]

Describe the style change
i found black will split arr[1] to a wired format

Examples in the current Black style

some_arr[
1
]

Desired style

some_arr[1]

Additional context

[JelleZijlstra]

That is not in fact how Black formats that code normally. Perhaps you have a very long key. Could you provide more details?

[Cherrymelon]

here is detail

                        box["property"] = LineItem(category, key, "table", value.page_index)
                        box["item"] = project_name
                        if project_name.value:
                            span = project_name.value.lines[
                                -1
                            ]._LocationTextPart__location["spans"]
                            if span:
                                uniq_name = "{}_{}_{}".format(
                                    project_name.value._LocationText__str,
                                    project_name.value.lines[
                                        -1
                                    ]._LocationTextPart__location["spans"][0]["bbox"][
                                        0
                                    ],
                                    project_name.value.lines[
                                        -1
                                    ]._LocationTextPart__location["spans"][0]["bbox"][
                                        1
                                    ],
                                )

[rmorshea]

This seems like another example of: #2156

[felix-hilden]

Indeed, and also related to #571 because of the dotted names, although I couldn't find an issue on the tracker that combines fluent interfaces with subscript access. I'd expect the formatting to be:

if 1:
    if 1:
        if 1:
            box["property"] = LineItem(category, key, "table", value.page_index)
            box["item"] = project_name
            if project_name.value:
                span = (
                    project_name.value.lines[-1]
                    ._LocationTextPart__location["spans"]
                )
                if span:
                    uniq_name = "{}_{}_{}".format(
                        project_name.value._LocationText__str,
                        (
                            project_name.value.lines[-1]
                            ._LocationTextPart__location["spans"][0]["bbox"][0]
                        ),
                        (
                            project_name.value.lines[-1]
                            ._LocationTextPart__location["spans"][0]["bbox"][1]
                        ),
                    )

Since the last lines in the original example don't fit the line length, this is of course formatted further by exploding the subscripts. Sadly there isn't a fluent interface of subscripts.

[hauntsaninja]

Closing as a duplicate of #2156 and #1280