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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_binary(self, fname, silent=True):
 """Save DMatrix to an XGBoost buffer. Parameters fname : string Name of the output buffer file. silent : bool (optional; default: True) If set, the output is suppressed. """

        _check_call(_LIB.XGDMatrixSaveBinary(self.handle,
                                             c_str(fname),
                                             int(silent)))