主要是想记录一下for child in root.iter():这句的作用：

输入

<pre name="code" class="python">C:\Users\jeguan\Desktop\Test_2.xml

<Response Status="OKAY" CongLvl="LEVEL0" OverallProvTime="4026852" TimeInReqQueue="228" DbCommitTime="6371" RequestId="100000"> <CapacityParms><Category>RESIDENTIALSUBSCRIBER_R2</Category><FeatureSetName>R1 FEATURE SET</FeatureSetName><OfficeId>ylvJrPbcGgHE</OfficeId><CurrentCnt>0</CurrentCnt><LimitCnt>0000050</LimitCnt><SpareCapacity>0</SpareCapacity><TasUnequalDistribution>0</TasUnequalDistribution> </CapacityParms></Response>

代码为：

############################################################################
#   The same to re_testsearch(),the difference is ET.fromstring(str1) is
#   used,that is,there is no need to save the matched "restult" into a file
#   we can analize the content of the "result" directly.
#refer-to:https://docs.python.org/2/library/xml.etree.elementtree.html?highlight=elementtree
############################################################################
def re_testsearch2():

    from xml.etree import ElementTree as ET

    filename = r'C:\Users\jeguan\Desktop\Test_2.xml'

    open_file = open(filename,'r')
    read_file = open_file.readlines()

    # re.S means: Make the '.' special character match any character at all,# including a newline; without this flag,'.' will match anything except a newline.
    # '(.+?)' means: this is a lazzy match. When the fist 'Response>' is found,then
    # it will not try to match the next 'Response>'
    re_patt = re.compile(r'<Response Status="OKAY" CongLvl="LEVEL0"*(.+?)Response>',re.S)

    str1 = ""
    # 把读出的行放在str1中
    for line in read_file:
        str1 = str1 + line

    # re_patt.search() returns an object for MatchObject;
    # "result" is a string.
    result = re_patt.search(str1).group(0)

    # This code only used to make it more clear that "result" is used as a tree here.
    tree = result

    root = ET.fromstring(tree)
    #print(root.tag)
    #print(root.attrib)

    # Element has some useful methods that help iterate recursively over all
    # the sub-tree below it (its children,their children,and so on).
    # For example,Element.iter()
    #
    global dict_child
    dict_child = {}

 <span style="color:#CC0000;">   for child in root.iter():</span>
        dict_child[child.tag] = child.text
    #   print(child.tag)
    #   print(child.attrib)
    #   print(child.text)

    print(dict_child)

{'Category': 'RESIDENTIALSUBSCRIBER_R2','SpareCapacity': '0','LimitCnt': '0000050','FeatureSetName': 'R1 FEATURE SET','CurrentCnt': '0','TasUnequalDistribution': '0','OfficeId': 'ylvJrPbcGgHE','<span style="font-size:18px;color:#FF0000;">CapacityParms': '\n\t','Response': '\n    '</span>}