Answers for "why is xml.dom.minidom used"

xml.dom.minidom

from xml.dom import minidom

doc = minidom.parse("staff.xml")

# doc.getElementsByTagName returns NodeList
name = doc.getElementsByTagName("name")[0]
print(name.firstChild.data)

staffs = doc.getElementsByTagName("staff")
for staff in staffs:
        sid = staff.getAttribute("id")
        nickname = staff.getElementsByTagName("nickname")[0]
        salary = staff.getElementsByTagName("salary")[0]
        print("id:%s, nickname:%s, salary:%s" %
              (sid, nickname.firstChild.data, salary.firstChild.data))