python - python-docx 中的项目符号列表

Question

我正在尝试让它在 python-docx 中工作:

我可以使用它得到的项目符号列表:

from docx import Document
doc = Document()
p = doc.add_paragraph()
p.style = 'List Bullet'

r = p.add_run()
r.add_text("Item 1")
# Something's gotta come here to get the Sub-Item 1
r = p.add_run()
r.add_text("Item 2")    
# Something's gotta come here to get the Sub-Item 2

我想，在中间添加另一个段落不会有帮助，因为这基本上意味着我正在制作另一个 List Bullet，其格式与其父级相同，而不是我想要的类似子格式的格式.此外，在同一段落中添加另一个 run 也无济于事(我试过了，把整个事情搞砸了..)。有什么办法吗？

Answer 1

有一种方法可以做到这一点，但您需要做一些额外的工作。目前在 python-docx 中没有用于执行此操作的“ native ”接口(interface)。每个带项目符号的项目必须是一个单独的段落。运行仅适用于文本字符。

想法是列表项目符号或编号由具体的项目符号或编号样式控制，具体样式指的是抽象样式。抽象样式决定受影响段落的样式，而具体编号决定抽象序列中的编号/项目符号。这意味着您可以让没有项目符号的段落和散布在项目符号段落之间的编号。同时，您可以随时通过创建新的具体样式重新开始编号/项目符号序列。

所有这些信息都在 Issue #25 中散列(详细但未成功) .我现在没有时间或资源来解决这个问题，但我确实写了一个我留在 comment 中的函数。在讨论线程中。此函数将根据您想要的缩进级别和段落样式查找抽象样式。然后它将基于该抽象样式创建或检索具体样式并将其分配给您的段落对象:

def list_number(doc, par, prev=None, level=None, num=True):
    """
    Makes a paragraph into a list item with a specific level and
    optional restart.

    An attempt will be made to retreive an abstract numbering style that
    corresponds to the style of the paragraph. If that is not possible,
    the default numbering or bullet style will be used based on the
    ``num`` parameter.

    Parameters
    ----------
    doc : docx.document.Document
        The document to add the list into.
    par : docx.paragraph.Paragraph
        The paragraph to turn into a list item.
    prev : docx.paragraph.Paragraph or None
        The previous paragraph in the list. If specified, the numbering
        and styles will be taken as a continuation of this paragraph.
        If omitted, a new numbering scheme will be started.
    level : int or None
        The level of the paragraph within the outline. If ``prev`` is
        set, defaults to the same level as in ``prev``. Otherwise,
        defaults to zero.
    num : bool
        If ``prev`` is :py:obj:`None` and the style of the paragraph
        does not correspond to an existing numbering style, this will
        determine wether or not the list will be numbered or bulleted.
        The result is not guaranteed, but is fairly safe for most Word
        templates.
    """
    xpath_options = {
        True: {'single': 'count(w:lvl)=1 and ', 'level': 0},
        False: {'single': '', 'level': level},
    }

    def style_xpath(prefer_single=True):
        """
        The style comes from the outer-scope variable ``par.style.name``.
        """
        style = par.style.style_id
        return (
            'w:abstractNum['
                '{single}w:lvl[@w:ilvl="{level}"]/w:pStyle[@w:val="{style}"]'
            ']/@w:abstractNumId'
        ).format(style=style, **xpath_options[prefer_single])

    def type_xpath(prefer_single=True):
        """
        The type is from the outer-scope variable ``num``.
        """
        type = 'decimal' if num else 'bullet'
        return (
            'w:abstractNum['
                '{single}w:lvl[@w:ilvl="{level}"]/w:numFmt[@w:val="{type}"]'
            ']/@w:abstractNumId'
        ).format(type=type, **xpath_options[prefer_single])

    def get_abstract_id():
        """
        Select as follows:

            1. Match single-level by style (get min ID)
            2. Match exact style and level (get min ID)
            3. Match single-level decimal/bullet types (get min ID)
            4. Match decimal/bullet in requested level (get min ID)
            3. 0
        """
        for fn in (style_xpath, type_xpath):
            for prefer_single in (True, False):
                xpath = fn(prefer_single)
                ids = numbering.xpath(xpath)
                if ids:
                    return min(int(x) for x in ids)
        return 0

    if (prev is None or
            prev._p.pPr is None or
            prev._p.pPr.numPr is None or
            prev._p.pPr.numPr.numId is None):
        if level is None:
            level = 0
        numbering = doc.part.numbering_part.numbering_definitions._numbering
        # Compute the abstract ID first by style, then by num
        anum = get_abstract_id()
        # Set the concrete numbering based on the abstract numbering ID
        num = numbering.add_num(anum)
        # Make sure to override the abstract continuation property
        num.add_lvlOverride(ilvl=level).add_startOverride(1)
        # Extract the newly-allocated concrete numbering ID
        num = num.numId
    else:
        if level is None:
            level = prev._p.pPr.numPr.ilvl.val
        # Get the previous concrete numbering ID
        num = prev._p.pPr.numPr.numId.val
    par._p.get_or_add_pPr().get_or_add_numPr().get_or_add_numId().val = num
    par._p.get_or_add_pPr().get_or_add_numPr().get_or_add_ilvl().val = level

使用默认内置文档 stub 中的样式，您可以执行如下操作:

d = docx.Document()
p0 = d.add_paragraph('Item 1', style='List Bullet')
list_number(d, p0, level=0, num=False)
p1 = d.add_paragraph('Item A', style='List Bullet 2')
list_number(d, p1, p0, level=1)
p2 = d.add_paragraph('Item 2', style='List Bullet')
list_number(d, p2, p1, level=0)
p3 = d.add_paragraph('Item B', style='List Bullet 2')
list_number(d, p3, p2, level=1)

样式不仅会影响段落的制表位和其他显示特征，而且还有助于查找适当的摘要编号方案。当您在对 p0 的调用中隐式设置 prev=None 时，该函数会创建一个新的具体编号方案。所有剩余的段落都将继承相同的方案，因为它们获得了一个 prev 参数。对 list_number 的调用不必像那样与对 add_paragraph 的调用交错，只要段落的编号用作 prev 在通话前设置。

您可以在我维护的名为 haggis 的库中找到此函数的实现，在 GitHub 和 PyPi 上可用:haggis.files.docx.list_number .