Python Serial Help

import serial

#Use for Linux
ser = serial.Serial('/dev/ttyUSB0', 9600)

#Use for Windows
ser = serial.Serial('YOU_COM', 9600)  # YOUR_COM needs to be the Windows COM port.

ser.write('asdf\n')  # write data to the serial port
ser.inWaiting() # gets the number of bytes waiting to be read
ser.read(X) # reads X number of bytes