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Dump headers of parent nested tables #447

@oleole39

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@oleole39

Hello,

  1. I was trying to convert this python dictionnary

    my_dict = {
        "apps": {
            "test": {
                "whatever_1": {
                    "date": "2025-12-16",
                },
                "whatever_2": {
                    "date": "2025-12-16",
                },
            },
        },
    }

    ...to this TOML output:

    [apps]
        [apps.test]
            [apps.test.whatever_1]
            date = "2025-12-16"
            [apps.test.whatever_2]
            date = "2025-12-16"
    
  2. I first had great hopes with:

    print(tomlkit.dumps(my_dict))

    but that outputs

    [apps.test.whatever_1]
    date = "2025-12-16"
    
    [apps.test.whatever_2]
    date = "2025-12-16"
  3. With a bit of pain, I eventually manage to get the expected output using:

    my_dict_new = tomlkit.document()
    for category_name, apps in my_dict.items():
        cat = tomlkit.table(False)
        for app_name, app_reports in apps.items():
            app = tomlkit.table(False).indent(4)
            for report_name, report_data in app_reports.items():
                rep = tomlkit.table(False).indent(4)
                for key, val in report_data.items():
                    rep.add(key, val).indent(4) 
                app.append(report_name, rep)
            cat.append(app_name, app)
        my_dict_new.append(category_name, cat)
    
    print(tomlkit.dumps(my_dict_new))

As this the reverse scenario from #47 and #107 in which the target output here seemed to be the default .dumps() output at the time, I wonder whether there would be a quicker way to access the old behavior again (i.e. dump headers for parent nested headers) ?

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