Retrieve data from oscilloscope using pyserial on ubuntu

[jte350]

Hi i am trying to retrieve data from an oscilloscope, it works well with windows using the provided software but i need to use it with ubuntu using the raw data directly. For the moment i came up with:

import serial
from serial import Serial

ser = serial.Serial('/dev/ttyACM0',115200, timeout=0)
print ser.name

packet = bytearray()
packet.append(<byte1>)
packet.append(<byte2>)
packet.append(<byte3>)
packet.append(<byte4>)

ser.write(packet)
print packet 
while ser.in_waiting:
	data=ser.read()
	print data
	print '\n'	
ser.close()

but the while loop is not performed, and also how to set parameters like ReadIntervalTimeout, ReadTotalTimeoutMultiplier specific to win32 serial or is there a more suitable library than pyserial. I am sure about the <bytei> values, i figured them using a serial port sniffer.

Best regards.