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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 rename_attribute(self, attribute: str, new_name: str) -> None: """Renames an attribute. Use only if is_mapping() returns true. If the attribute does not exist, this will do nothing. Args: attribute: The (old) name of the attribute to rename. new_name: The new name to rename it to. """

        for key_node, _ in self.yaml_node.value:
            if key_node.value == attribute:
                key_node.value = new_name
                break