How to use the internetarchive.modify_metadata function in internetarchive

def ia_modify_metadata(self, identifier, metadata):
        try:
            modify_metadata(identifier, metadata = metadata, \
                            access_key = self.access_key, \
                            secret_key = self.secret_key)
        except Exception as e:
            self.logger.warn('Could not  modify metadata %s. Error %s' , identifier, e)
            return False
        return True

def ia_modify_metadat(self, identifier, metadata):
        try:
            modify_metadata(identifier, metadata = metadata, \
                            access_key = self.access_key, \
                            secret_key = self.secret_key)
        except Exception as e:
            self.logger.warn('Could not  modify metadata %s. Error %s' , identifier, e)
            return False
        return True