Calling ElementTree.write on an ElementTree instance where ElementTree._root is the wrong type causes possible data loss #135640
Description
Bug report
Bug description:
Example:
tree = xml.etree.ElementTree.ElementTree(element = "") # element should be an ElementTree.Element object or None
tree.write("file.xml") # This appropriately causes a traceback, but blanks file.xml if it exists
PR coming with a fix!
CPython versions tested on:
CPython main branch, 3.14
Operating systems tested on:
macOS