import urllib.request
import xml.etree.ElementTree as etree

f= open('air.xml',encoding='utf-8')
text=f.read()
f.close()

#print(text)

root=etree.fromstring(text)
for child in root:#header,body
    for grandchild in child:#resultCode,resultMsg,items
        for ggchild in grandchild:
            for gggchild in ggchild:
                print(gggchild.tag)