Send data from Arduino to raspberry pi through USB cable (Solved)

Projects Programming
3 
import serial
import time

def Read_Weight():
        time.sleep(2)

        ser = serial.Serial(
        port='/dev/ttyACM0',
        baudrate = 115200,
        bytesize = serial.EIGHTBITS,
        parity = serial.PARITY_NONE,
        stopbits = serial.STOPBITS_ONE,
        xonxoff = False,
        rtscts = False,
        dsrdtr = False,
        timeout = 1
        )

        while 1:

                for _ in range(10):
                        data = ser.readline()
                        return data
#                       Serial.flush();
                Serial.flush();

Thats the code after I did all I could think off, but I still loose data the same as before, its bit more rare but still happens. :confused: