most xml parsers use this tree-like structure to read xml content the following are the two major types of xml parsersdom parserthe document object model parser is the closest form of tree representation of an xml it parses the xml and generates the tree structure one big disadvantage with dom parsers is their instability with huge xml files sax parserthe simple api for xml (or sax for shortis variant widely used on the web this is an event-based parser that parses an xml element by element and provides hooks to trigger events based on tags this overcomes the memory-based restrictions of dom but lacks overall representation power there are multiple variants available that derive from these two types to begin withlet' take look at the elementtree parser available from python' xml library the elementtree parser is an optimization over the dom parser and it utilizes python data structures like lists and dicts to handle data in concise manner the following snippet uses the elementtree parser to load and parse the sample xml file we saw previously the parse(function returns tree objectwhich has various attributesiteratorsand utilities to extract root and further components of the parsed xml tree et parse(file_nameroot tree getroot(print("root tag:{ }format(root tag)print("attributes of root:{ }format(root attrib)the two print statements provide us with values related to the root tag and its attributes (if there are anythe root object also has an iterator attached to it which can be used to extract information related to all child nodes the following snippet iterates the root object to print the contents of child nodes for child in xml:rootprint("{ }tag:{ }attribute:{ }format"\ "*indent_levelchild tagchild attrib)print("{ }tag data:{ }format("\ "*indent_levelchild text)the final output generated by parsing the xml using elementtree is as follows we used custom print utility to make the output more readablethe code for which is available on the repository root tag:records attributes of root:{'attr''sample xml records'tag:recordattribute:{'name''rec_ 'tag datatag:sub_elementattribute:{tag datatag:detail attribute:{tag data:attribute tag:detail attribute:{tag data: