XMP Array Property - Bag, Seq, or Alt

How to insert or update an XMP array property (bag, seq, or alt).

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import sys
import chilkat

xmp = chilkat.CkXmp()

success = xmp.UnlockComponent("Anything for 30-day trial.")
if (success != True):
    print xmp.lastErrorText()
    sys.exit()

#  Load a JPG or TIF image file.
#  Sample JPG's with XMP metadata may be found at:
#  http://www.chilkatsoft.com/testData/xmp/sample1.jpg
#  http://www.chilkatsoft.com/testData/xmp/sample2.jpg
#  http://www.chilkatsoft.com/testData/xmp/sample3.jpg
success = xmp.LoadAppFile("sample1.jpg")
if (success != True):
    print xmp.lastErrorText()
    sys.exit()

print "Num embedded XMP docs: " + xmp.get_NumEmbedded()

#  Assuming there is at least one, get the 1st.
#  (There is typically never more than one, but theoretically it's possible.)

# xml is a CkXml
xml = xmp.GetEmbedded(0)
if (not (xml == None )):

    #  Create an object to hold one or more string values.
    sa = chilkat.CkStringArray()
    sa.Append("value_1")
    sa.Append("value_2")
    #  ...

    success = xmp.AddArray(xml,"bag","Iptc4xmpCore:Chilkat",sa)
    if (success != True):
        print xmp.lastErrorText()
    else:
        #  Save the JPG.
        xmp.put_SaveAppFile(xmp.get_SaveAppFile() S ("modified.jpg"))

else:
    print xmp.lastErrorText()