Table of Contents header

[TheGroundZero]

Hi

I've added a Table of Contents (ToC) to my document via Mustash's code in #36

Now I'd like to add a header above it, in the ToC Header style (so that it doesn't add it's own header in the table).

However, I seem to be unable to find the correct style for this in the docs.

from docx.enum.style import WD_BUILTIN_STYLE

document = Document()
document.add_paragraph('Table of Contents', style=WD_BUILTIN_STYLE.INDEX_HEADING)
document.save()

Traceback (most recent call last):
  [ . . . ]
  File "/root/TOOLS/.../.../libs/export.py", line 330, in export_to_word
    document.add_paragraph('Table of Contents', style=WD_BUILTIN_STYLE.INDEX_HEADING)
  File "/usr/local/lib/python3.7/dist-packages/docx/document.py", line 63, in add_paragraph
    return self._body.add_paragraph(text, style)
  File "/usr/local/lib/python3.7/dist-packages/docx/blkcntnr.py", line 38, in add_paragraph
    paragraph.style = style
  File "/usr/local/lib/python3.7/dist-packages/docx/text/paragraph.py", line 111, in style
    style_or_name, WD_STYLE_TYPE.PARAGRAPH
  File "/usr/local/lib/python3.7/dist-packages/docx/parts/document.py", line 76, in get_style_id
    return self.styles.get_style_id(style_or_name, style_type)
  File "/usr/local/lib/python3.7/dist-packages/docx/styles/styles.py", line 113, in get_style_id
    return self._get_style_id_from_name(style_or_name, style_type)
  File "/usr/local/lib/python3.7/dist-packages/docx/styles/styles.py", line 143, in _get_style_id_from_name
    return self._get_style_id_from_style(self[style_name], style_type)
  File "/usr/local/lib/python3.7/dist-packages/docx/styles/styles.py", line 57, in __getitem__
    raise KeyError("no style with name '%s'" % key)
KeyError: "no style with name 'INDEX_HEADING (-34)'"