Class _ParentedElement

source code

etree.ElementTree._ElementInterface --+        
                                      |        
                       _AbstractElement --+    
                                          |    
                   _AbstractParentedElement --+
                                              |
                                             _ParentedElement

A specialized version of etree.ElementTree.Element that keeps track of a single parent pointer per element.

Each _ParentedElement may have at most one parent. In particular, subtrees may not be shared. Any attempt to reuse a single _ParentedElement as a child of more than one parent (or as multiple children of the same parent) will cause a ValueError exception to be raised.

_ParentedElements should never be used in the same tree as other Element implementation classes. Mixing Element implementations may result in incorrect parent pointers and in ValueError exceptions.