code: def match_namespace(self, el, tag):
          
  
          match = True
          namespace = self.get_tag_ns(el)
          default_namespace = self.namespaces.get('')
          tag_ns = '' if tag.prefix is None else self.namespaces.get(tag.prefix, None)
          # We must match the default namespace if one is not provided
          if tag.prefix is None and (default_namespace is not None and namespace != default_namespace):
              match = False
          # If we specified `|tag`, we must not have a namespace.
          elif (tag.prefix is not None and tag.prefix == '' and namespace):
              match = False
          # Verify prefix matches
          elif (
              tag.prefix and
              tag.prefix != '*' and (tag_ns is None or namespace != tag_ns)
          ):
              match = False
          return match
docs: Match the namespace of the element.