Nios II and Python

I am trying to send char bytes from my fpga to a python program, the data bytes are hexadecimal data, and those values will be plotted in a GUI table. The nios code is

unsigned char temp =0xa;

unsigned char temp1 =0xb;

unsigned char temp2 =0xc;

while(1)

{

sendFloat(temp);

sendFloat(temp1);

sendFloat(temp2);

}

return0;

}

void sendFloat( unsigned char n)

{

char number[20];

int i=0;

snprintf(number, sizeof(number),"%u", n);

while(i<20){

IOWR_ALTERA_AVALON_UART_TXDATA(UART_BASE,number[i]);

delay();

i++;

}

IOWR_ALTERA_AVALON_UART_TXDATA(UART_BASE,'\n');}

The Python code is

import serial

ser= serial.Serial('COM5',baudrate =115200, timeout=1)

while 1:

fpgadata=ser.readline()

print(fpgadata)