@os.setter
    def os(self, value):
        """The os property.
        
        Args:
            value (string). the property value.
        """
        if value == self._defaults['ai.device.os'] and 'ai.device.os' in self._values:
            del self._values['ai.device.os']
        else:
            self._values['ai.device.os'] = value
dataset/ETHPy150Open Microsoft/ApplicationInsights-Python/applicationinsights/channel/contracts/Device.py/Device.os/original