在 etree 上使用 iterdescendants() 时，可以修改树吗？
(Python 3.2)
我正在使用 etree 来解析一些 XML。为此，我使用 iterdescendants() 递归地迭代文档。所以，就像：
for elem in doc.iterdescendants():
if elem.tag == "tag":
pass # Further processing
有时，我处理一个父标签，其中包含我想防止在以后的递归中处理的子标签。毁掉孩子可以吗？
在我的初始测试中，我尝试过：
for child in elem.getchildren(): child.clear()
出于某种原因，这会导致紧随 elem 之后的元素被处理。就像元素也被删除一样。
然后我尝试了这个，它有效（因为它删除了父级及其子级，但不会导致父级的任何后续兄弟姐妹被跳过/受影响）：
elem.clear()
任何人都可以对此有所了解吗？谢谢，
(Python 3.2)
I'm using etree to parse some XML. To do this, I'm recursively iterating through the document with iterdescendants(). So, something like:
for elem in doc.iterdescendants():
if elem.tag == "tag":
pass # Further processing
Sometimes, I process a parent tag that contains children that I want to prevent from being processed in a later recursion. Is it ok to destroy the children?
In my initial testing, I've tried:
for child in elem.getchildren(): child.clear()
For some reason, this results in the element immediately after elem from being processed. It's like the element gets removed as well.
I then tried this, which works (in that it removes the parent and its children, but doesn't result in any subsequent siblings of the parent from being skipped/affected as well):
elem.clear()
Can anyone shed some light on this? Thanks,
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我用以下代码代替了您的代码，它似乎可以工作，删除所有子元素。我使用 iterfind 查找带有该标签的所有后代并将其删除。
I have the following code in place of yours and it seems to work, deleting all the child elements. I use iterfind to find all descendants with the tag and delete them.