__init__.py 文件源码

def set_prefixes(self, elem, prefix_map):

        # check if this is a tree wrapper
        if not ElementTree.iselement(elem):
            elem = elem.getroot()

        # build uri map and add to root element
        uri_map = {}
        for prefix, uri in prefix_map.items():
            uri_map[uri] = prefix
            elem.set("xmlns:" + prefix, uri)

        # fixup all elements in the tree
        memo = {}
        for elem in elem.getiterator():
            self.fixup_element_prefixes(elem, uri_map, memo)