13.7.1 DOM Objects
The definition of the DOM API for Python is given as part of the xml.dom module documentation. This section lists the
differences between the API and xml.dom.minidom.
- Break internal references within the DOM so that it will be garbage collected on
versions of Python without cyclic GC. Even when cyclic GC is available, using this can
make large amounts of memory available sooner, so calling this on DOM objects as soon as
they are no longer needed is good practice. This only needs to be called on the Document object, but may be called on child nodes to discard children
of that node.
- Write XML to the writer object. The writer should have a write()
method which matches that of the file object interface.
New in version 2.1: To support pretty output, new keyword
parameters indent, addindent, and newl have been added.
New in version 2.3: For the Document
node, an additional keyword argument encoding can be used to specify the encoding field of
the XML header.
- Return the XML that the DOM represents as a string.
New in version 2.3: the encoding argument.
With no argument, the XML header does not specify an encoding, and the result is
Unicode string if the default encoding cannot represent all characters in the document.
Encoding this string in an encoding other than UTF-8 is likely incorrect, since UTF-8 is
the default encoding of XML.
With an explicit encoding argument, the result is a byte string in the
specified encoding. It is recommended that this argument is always specified. To avoid
UnicodeError exceptions in case of unrepresentable text data, the encoding argument should
be specified as "utf-8".
Return a pretty-printed version of the document. indent specifies the
indentation string and defaults to a tabulator; newl specifies the string
emitted at the end of each line and defaults to
New in version 2.1.
New in version 2.3: the encoding argument; see toxml.
The following standard DOM methods have special considerations with xml.dom.minidom:
- Although this method was present in the version of xml.dom.minidom packaged with Python 2.0, it
was seriously broken. This has been corrected for subsequent releases.