Write number to the data stream .

        @param  n: The number data to be encoded to the AMF0 data stream.

def writeNumber(self, n):
        """
        Write number to the data stream .

        @param  n: The number data to be encoded to the AMF0 data stream.
        """
        self.writeType(TYPE_NUMBER)
        self.stream.write_double(float(n))