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# 20.8. `xml.dom.pulldom` — Support for building partial DOM trees

New in version 2.0.

`xml.dom.pulldom` allows building only selected portions of a Document Object Model representation of a document from SAX events.

class `xml.dom.pulldom.``PullDOM`([documentFactory])
  `xml.sax.handler.ContentHandler` implementation that ...

class `xml.dom.pulldom.``DOMEventStream`(stream, parser, bufsize)
  ...

class `xml.dom.pulldom.``SAX2DOM`([documentFactory])
  `xml.sax.handler.ContentHandler` implementation that ...

`xml.dom.pulldom.``parse`(stream_or_string[, parser[, bufsize]])
  ...

`xml.dom.pulldom.``parseString`(string[, parser])
  ...

`xml.dom.pulldom.``default_bufsize`

  Default value for the bufsize parameter to `parse()`.

  Changed in version 2.1: The value of this variable can be changed before calling `parse()` and the new value will take effect.

## 20.8.1. DOMEventStream Objects

`DOMEventStream.``getEvent`()
  ...

`DOMEventStream.``expandNode`(node)
  ...

`DOMEventStream.``reset`()
  ...

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