python - independent simultaneous input -

in python code want read data serial port take input user through keyboard.the data serial port , keyboard can come @ time , independent of each other.i started making 2 threads 2 inputs.

import thread  def serialread():  while 1:   while(is.waiting>0)    out+=ser.read()   print out # input 'out'  def keyboard():  while 1:   print(raw_input("enter command")) #now keyboard input  thread.start_new_thread(serialread,()) thread.start_new_thread(keyboard, ()) 

when run above code terminal waits both keyboard input serial read before going next iteration, want when there serial read thread should work , whenever there keyboard inp respective thread should work, should not wait both inputs , got next iteration.

is possible??should use threading module??