(Python) Traverse Direct Children via FirstChild / NextSibling, or LastChild / PreviousSibling

Demonstrates some ways to iterate over direct child nodes using the FirstChild / NextSibling and LastChild / PreviousSibling methods.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

 Chilkat Python Module Downloads for Windows, Linux, and MAC OS X

import sys
import chilkat

xml = chilkat.CkXml()

#  The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
success = xml.LoadXmlFile("fruit.xml")
if (success != True):
    print xml.lastErrorText()
    sys.exit()

#  Iterate over the direct children by using FirstChild / NextSibling
# child is a CkXml
child = xml.FirstChild()
while not (child == None ) :
    print child.tag() + " : " + child.content()
    # nextSibling is a CkXml
    nextSibling = child.NextSibling()

    # child is a CkXml
    child = nextSibling

print "-----"

#  Do the same, but with FirstChild2 / NextSibling2 to avoid
#  creating so many XML object instances:
success = xml.FirstChild2()
while success == True :
    print xml.tag() + " : " + xml.content()
    success = xml.NextSibling2()

#  Revert back up to the parent:
xml.GetParent2()

print "-----"

#  Iterate in reverse order using LastChild / PreviousSibling
# child is a CkXml
child = xml.LastChild()
while not (child == None ) :
    print child.tag() + " : " + child.content()
    # prevSibling is a CkXml
    prevSibling = child.PreviousSibling()

    # child is a CkXml
    child = prevSibling

print "-----"

#  Do the same, but with LastChild2 / PreviousSibling2 to avoid
#  creating so many XML object instances:
success = xml.LastChild2()
while success == True :
    print xml.tag() + " : " + xml.content()
    success = xml.PreviousSibling2()

#  Revert back up to the parent:
xml.GetParent2()