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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 save(self, path: Union[str, bytes, int]) -> None: """Write QASM output to a file specified by path."""

        with open(path, 'w') as f:
            def write(s: str) -> None:
                f.write(s)
            self._write_qasm(write)