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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getXmlText (parent, tag):
 """Return XML content of given tag in parent element."""

    elem = parent.getElementsByTagName(tag)[0]
    # Yes, the DOM standard is awful.
    rc = []
    for node in elem.childNodes:
        if node.nodeType == node.TEXT_NODE:
            rc.append(node.data)
    return ''.join(rc)