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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 process_xml(self, xml):
        '''
        Parse OutcomeResponse data form XML.
        '''
        try:
            root = objectify.fromstring(xml)
            # Get message idenifier from header info
            self.message_identifier = root.imsx_POXHeader.\
                imsx_POXResponseHeaderInfo.\
                imsx_messageIdentifier

            status_node = root.imsx_POXHeader.\
                imsx_POXResponseHeaderInfo.\
                imsx_statusInfo

            # Get status parameters from header info status
            self.code_major = status_node.imsx_codeMajor
            self.severity = status_node.imsx_severity
            self.description = status_node.imsx_description
            self.message_ref_identifier = str(
                status_node.imsx_messageRefIdentifier)
            self.operation = status_node.imsx_operationRefIdentifier

            try:
                # Try to get the score
                self.score = str(root.imsx_POXBody.readResultResponse.
                                 result.resultScore.textString)
            except AttributeError:
                # Not a readResult, just ignore!
                pass
        except:
            pass