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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 create(self, root=None, namespace=None):
 """Create a sequence element with the given root. @param root: The C{etree.Element} to root the sequence at, if C{None} a new one will be created.. @result: A L{SequenceItem} with the given root. @raises L{ECResponseError}: If the given C{root} has a bad tag. """

        if root is not None:
            tag = root.tag
            if root.nsmap:
                namespace = root.nsmap[None]
                tag = tag[len(namespace) + 2:]
            if tag != self.tag:
                raise WSDLParseError("Expected response with tag '%s', but "
                                       "got '%s' instead" % (self.tag, tag))
        return SequenceItem(self, root, namespace)