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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 indent_xml(elem, level=0, more_sibs=False):
 """Indent an xml element object to prepare for pretty printing. To avoid changing the contents of the original Element, it is recommended that a copy is made to send to this function. Args: elem: Element to indent. level: Int indent level (default is 0) more_sibs: Bool, whether to anticipate further siblings. """

    i = "\n"
    pad = "    "
    if level:
        i += (level - 1) * pad
    num_kids = len(elem)
    if num_kids:
        if not elem.text or not elem.text.strip():
            elem.text = i + pad
            if level:
                elem.text += pad
        count = 0
        for kid in elem:
            if kid.tag == "data":
                kid.text = "*DATA*"
            indent_xml(kid, level + 1, count < num_kids - 1)
            count += 1
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
            if more_sibs:
                elem.tail += pad
    else:
        if level and (not elem.tail or not elem.tail.strip()):
            elem.tail = i
            if more_sibs:
                elem.tail += pad