在Python中遍历子标记的XML子标记

Question

Currently, I have an XML file. I want to say, if string is this print all the child element associated with this . I've documented some of the code that I've tried. I'm using the element tree built in.

XML

<commands>
    <command name="this" type="out" major="0x1" minor="0x0">
        <data bytes="1-0" descrip=" ID"></data>
        <data bytes="3-2" descrip=" ID"></data>
        <data bytes="5-4" descrip=" ID"></data>
        <data bytes="7-6" descrip="  Code"></data>
        <data bytes="12-8" descrip=" Revision"></data>
        <data bytes="13" descrip=" Version"></data>
        <data bytes="14" descrip="   Mask"></data>
        <data bytes="15" descrip="Reserved"></data>
        <data bytes="17-16" descrip="   Windows"></data>
        <data bytes="19-18" descrip=" of Write Flush Addresses"></data>
    </command>
</commands>

Sample Code to Parse Out Names

tree = ET.parse('command_details.xml')
root = tree.getroot()

for child in root:

    if child.attrib['major'] == str(hex(int(major_bits[::-1], 2))) and child.attrib['minor'] == str(hex(int(minor_bits[::-1], 2))):
        command_name = str(child.attrib['name'])

I basically want to dive deeper and print the sub tags of the command name.

Answer 1

You have to get the children of the child and iterate through all of the grandchildren

tree = ET.parse('command_details.xml')
root = tree.getroot()

for child in root:

    if child.attrib['major'] == str(hex(int(major_bits[::-1], 2))) and child.attrib['minor'] == str(hex(int(minor_bits[::-1], 2))):
        command_name = str(child.attrib['name'])    
        for grandchild in child.getchildren():
            print str(grandchild.attrib['bytes'])
            print str(grandchild.attrib['descrip'])

Or if you want to print the full XML line, you can do:

print ET.tostring(grandchild).strip()