Introduction and use of xml files

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Notepad needs to manually install and enable the XMLTools plug-in to format XML; if the tags are messed up or the content is lost after formatting, it means that the XML itself is illegal, and there are problems such as unclosed tags or illegal characters.

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python-docx does not support direct reading of XML files. You need to use xml.etree.ElementTree or lxml to parse the XML extraction fields first, and then write them into the Document object segment by segment. Explicit declaration of prefixes is required to process namespaces, and manual manipulation of the underlying XML is required for table merging and styling. Chinese paths should be avoided when saving.

To parse remote XML API in Python, you need to use requests to get the response and then check the status code and Content-Type. Prioritize using r.text with xml.etree.ElementTree to parse; when encountering a namespace, you need to pass the namespace dictionary; use iterparse to stream large files and clear them manually; front-end JS requires CORS support or proxy.

You should use attributes to store short metadata (such as id, type), and use elements to store scalable content data; because attributes do not support namespaces, duplication, nesting, and internationalization, their parsing is error-prone and maintenance is difficult.

The XML file cannot be opened by double-clicking because it is associated with Notepad by default, causing confusion in the display. You should use Notepad, VSCode or Edge instead; Edge can format and report errors, while VSCode requires the installation of extensions such as RedHatXML for normal highlighting, indentation and verification.

XDocument.Load() is the preferred method for reading local XML files and automatically handles encoding, BOM and format exceptions; absolute or correct relative paths are required; namespaces must be explicitly declared and participate in queries; Elements() and Descendants() behave differently and should be selected as needed; string parsing must capture XmlException and verify the source.