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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 get_element_child_info(doc, attr):
 """Get information from child elements of this elementas a list since order is important. Don't include signature tags. :param doc: XML element :param attr: Attribute to get from the elements, for example "tag" or "text". """

    props = []
    for child in doc:
        if child.tag not in ["author_signature", "parent_author_signature"]:
            props.append(getattr(child, attr))
    return props