Untitled

from suds.plugin import MessagePlugin
from suds.sax.document import Document


class RemoveEmptyNodes(MessagePlugin):
    """
    A Suds plugin, designed to remove empty nodes from an outgoing message before it is sent.
    """
    def marshalled(self, context):
        """
        Removes all short-closed, empty nodes from the outgoing XML's <body>.
        """
        recursive_remove(context.envelope.getChild('Body'))


def recursive_remove(node):
    """
    Recurses down through an XML tree from ``node``, removing all empty nodes and nodes whose children are
    all empty.
    """
    for child in node.getChildren():
        if is_empty(child):
            node.remove(child)
        else:
            recursive_remove(child)


def is_empty(node):
    """
    Using recursion, returns ``True``, if a node's entire tree contains no attributes or text values, else
    returns ``False``.
    """
    return node.isempty() or (all([is_empty(child) for child in node.getChildren()]) if
                              len(node.getChildren()) > 0 else False)