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我想构建一个图表,显示给定 XML 文档中哪些标签用作其他标签的子级。

我编写了这个函数来获取 lxml.etree 树中给定标签的唯一子标签集:

def iter_unique_child_tags(root, tag):
    """Iterates through unique child tags for all instances of tag.

    Iteration starts at `root`.
    """
    found_child_tags = set()
    instances = root.iterdescendants(tag)
    from itertools import chain
    child_nodes = chain.from_iterable(i.getchildren() for i in instances)
    child_tags = (n.tag for n in child_nodes)
    for t in child_tags:
        if t not in found_child_tags:
            found_child_tags.add(t)
            yield t

是否有一个通用的图形构建器,我可以使用这个函数来构建一个点文件或其他格式的图形?

我也偷偷怀疑在某个地方专门为此目的设计了一个工具。那可能是什么?

4

1 回答 1

3

我最终使用了python-graph。最后,我还使用argparse构建了一个命令行界面,该界面从 XML 文档中提取一些基本信息,并以pydot支持的格式构建图形图像。它被称为xmlearn并且很有用:

usage: xmlearn [-h] [-i INFILE] [-p PATH] {graph,dump,tags} ...

optional arguments:
  -h, --help            show this help message and exit
  -i INFILE, --infile INFILE
                        The XML file to learn about. Defaults to stdin.
  -p PATH, --path PATH  An XPath to be applied to various actions.
                        Defaults to the root node.

subcommands:
  {graph,dump,tags}
    dump                Dump xml data according to a set of rules.
    tags                Show information about tags.
    graph               Build a graph from the XML tags relationships.
于 2010-07-19T19:48:59.697 回答