I'm also facing the same problem. Sending an int value from arduino to raspberrpi3. But it showing some garbage hex value like /xc8 for value 200.
import serial
import time
ser = serial.Serial("/dev/ttyAMA0",baudrate = 9600)
time.sleep(1)
while 1:
x = ser.read(1) * 256
x = x + ser.read(1)
if x>100 :
print ("data",x)
Please solve this..............